RTCnet™ / LINKnet™ HT Nodes

Product Manual 26640
(Revision NEW)
Original Instructions
RTCnet™ / LINKnet™ HT Nodes
Installation and Operation Manual
Read this entire manual and all other publications pertaining to the work to be
performed before installing, operating, or servicing this equipment.
Practice all plant and safety instructions and precautions.
General
Precautions Failure to follow instructions can cause personal injury and/or property damage.
Revisions
This publication may have been revised or updated since this copy was produced.
To verify that you have the latest revision, check manual 26311 , Revision Status &
Distribution Restrictions of Woodward Technical Publications, on the publications
page of the Woodward website:
www.woodward.com/publications
The latest version of most publications is available on the publications page. If
your publication is not there, please contact your customer service representative
to get the latest copy.
Proper Use
Any unauthorized modifications to or use of this equipment outside its specified
mechanical, electrical, or other operating limits may cause personal injury and/or
property damage, including damage to the equipment. Any such unauthorized
modifications: (i) constitute "misuse" and/or "negligence" within the meaning of
the product warranty thereby excluding warranty coverage for any resulting
damage, and (ii) invalidate product certifications or listings.
If the cover of this publication states "Translation of the Original Instructions"
please note:
The original source of this publication may have been updated since this
Translated translation was made. Be sure to check manual 26311 , Revision Status &
Publications Distribution Restrictions of Woodward Technical Publications, to verify whether
this translation is up to date. Out-of-date translations are marked with . Always
compare with the original for technical specifications and for proper and safe
installation and operation procedures.
Revisions—Changes in this publication since the last revision are indicated by a black line
alongside the text.
Woodward reserves the right to update any portion of this publication at any time. Information provided by Woodward is
believed to be correct and reliable. However, no responsibility is assumed by Woodward unless otherwise expressly
undertaken.
Copyright © Woodward 2012
All Rights Reserved
Manual 26640
RTCnet / LINKnet HT Nodes
Contents
IOLOCK. When a CPU or I/O module fails, watchdog logic drives it
into an IOLOCK condition where all output circuits and signals are
driven to a known de-energized state as described below. The
System MUST be designed such that IOLOCK and power OFF states
will result in a SAFE condition of the controlled device.
 CPU and I/O module failures will drive the module into an
IOLOCK state
 CPU failure will assert an IOLOCK signal to all modules and
expansion racks to drive them into an IOLOCK state.
 Discrete outputs / relay drivers will be non-active and deenergized
 Analog and Actuator outputs will be non-active and deenergized with zero voltage or zero current.
The IOLOCK state is asserted under various conditions including
 CPU and I/O module watchdog failures
 Power Up and Power Down conditions.
 System reset and hardware/software initialization
 Entering configuration mode
NOTE: Additional watchdog details and any exceptions to these
failure states are specified in the related CPU or I/O module section
of the manual.
WARNINGS AND NOTICES ........................................................................... IV ELECTROSTATIC DISCHARGE AWARENESS .................................................. V REGULATORY COMPLIANCE ....................................................................... VI CHAPTER 1. GENERAL INFORMATION ........................................................... 1 Introduction .............................................................................................................1 RTCnet Product Family ..........................................................................................2 LINKnet HT Product Family ....................................................................................2 Environmental Specifications .................................................................................3 CHAPTER 2. RTCNET AND LINKNET HT DISTRIBUTED I/O NETWORKS ......... 4 Product Compatibility..............................................................................................4 Network Wiring Considerations ..............................................................................4 Network Examples with MicroNet ...........................................................................5 Network Power Distribution ....................................................................................6 CAN Network Communications ..............................................................................6 CHAPTER 3. INSTALLATION.......................................................................... 9 Introduction .............................................................................................................9 Shipping Carton ......................................................................................................9 General Installation.................................................................................................9 Mounting Requirements .......................................................................................10 Outline Drawing for Nodes ...................................................................................12 Outline Drawing for T/C High Accuracy Node ......................................................13 General Wiring Guidance .....................................................................................14 Node Replacement / HotSwap .............................................................................16 Commissioning Checklist .....................................................................................17 Woodward
i
RTCnet / LINKnet HT Nodes
Manual 26640
Contents
CHAPTER 4. RTD NODES (8CH) .................................................................20 Description and Features .....................................................................................20 Block Diagram ......................................................................................................21 Specifications........................................................................................................21 RTD Curve Limits .................................................................................................23 Configuration ........................................................................................................24 Connector Pinouts ................................................................................................24 Field Wiring and Diagrams ...................................................................................25 Status Indicators and Trouble Codes ...................................................................26 CHAPTER 5. THERMOCOUPLE NODES (8CH) ...............................................28 Description and Features .....................................................................................28 Block Diagram ......................................................................................................29 Specifications........................................................................................................29 Thermocouple Curve Limits..................................................................................30 Configuration ........................................................................................................31 Connector Pinouts ................................................................................................31 Field Wiring and Diagrams ...................................................................................32 Status Indicators and Trouble Codes ...................................................................33 CHAPTER 6. AIO 4–20 MA NODES (8IN, 2OUT) ...........................................35 Description and Features .....................................................................................35 Block Diagram ......................................................................................................36 Specifications........................................................................................................36 Configuration ........................................................................................................37 Connector Pinouts ................................................................................................38 Field Wiring and Diagrams ...................................................................................39 Status Indicators and Trouble Codes ...................................................................40 CHAPTER 7. DISCRETE INPUT NODES (16CH) .............................................42 Description and Features .....................................................................................42 Block Diagram ......................................................................................................43 Specifications........................................................................................................43 Configuration ........................................................................................................44 Connector Pinouts ................................................................................................44 Field Wiring and Diagrams ...................................................................................45 Status Indicators and Trouble Codes ...................................................................46 CHAPTER 8. DISCRETE OUT RELAY DRIVER NODES (16CH) ........................47 Description and Features .....................................................................................47 Block Diagram ......................................................................................................48 Specifications........................................................................................................48 Configuration ........................................................................................................49 Connector Pinouts ................................................................................................49 Field Wiring and Diagrams ...................................................................................50 Status Indicators and Trouble Codes ...................................................................51 CHAPTER 9. SERVICE OPTIONS ..................................................................52 Product Service Options .......................................................................................52 Woodward Factory Servicing Options ..................................................................53 Returning Equipment for Repair ...........................................................................53 Replacement Parts ...............................................................................................54 Engineering Services ............................................................................................54 How to Contact Woodward ...................................................................................55 Technical Assistance ............................................................................................55 ii
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Contents
DECLARATIONS ......................................................................................... 57 Illustrations and Tables
Figure 1-1. RTCnet, Real-Time ..............................................................................2 Figure 1-2. LINKnet HT Products ...........................................................................2 Figure 3-1. RTCnet and LINKnet HT Node Outline Drawing ...............................12 Figure 3-2. T/C High Accuracy Node Outline Drawing .........................................13 Figure 4-1. Input Power Connector Pinout ...........................................................24 Figure 4-2. CAN Connector Pinout.......................................................................24 Figure 5-1. Input Power Connector Pinout ...........................................................31 Figure 5-2. CAN Connector Pinout.......................................................................31 Figure 6-1. Input Power Connector Pinout ...........................................................38 Figure 6-2. CAN Connector Pinout.......................................................................38 Figure 7-1. Input Power Connector Pinout ...........................................................44 Figure 7-2. CAN Connector Pinout.......................................................................44 Figure 8-1. Input Power Connector Pinout ...........................................................49 Figure 8-2. CAN Connector Pinout.......................................................................49 The following are trademarks of Woodward, Inc.:
GAP
LINKnet
MicroNet
RTCnet
Woodward
Woodward
iii
RTCnet / LINKnet HT Nodes
Manual 26640
Warnings and Notices
Important Definitions





This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that follow this
symbol to avoid possible injury or death.
DANGER—Indicates a hazardous situation which, if not avoided, will result
in death or serious injury.
WARNING—Indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION—Indicates a hazardous situation which, if not avoided, could
result in minor or moderate injury.
NOTICE—Indicates a hazard that could result in property damage only
(including damage to the control).
IMPORTANT—Designates an operating tip or maintenance suggestion.
Overspeed /
Overtemperature /
Overpressure
Personal Protective
Equipment
The engine, turbine, or other type of prime mover should be
equipped with an overspeed shutdown device to protect against
runaway or damage to the prime mover with possible personal injury,
loss of life, or property damage.
The overspeed shutdown device must be totally independent of the
prime mover control system. An overtemperature or overpressure
shutdown device may also be needed for safety, as appropriate.
The products described in this publication may present risks that
could lead to personal injury, loss of life, or property damage. Always
wear the appropriate personal protective equipment (PPE) for the job
at hand. Equipment that should be considered includes but is not
limited to:

Eye Protection

Hearing Protection

Hard Hat

Gloves

Safety Boots

Respirator
Always read the proper Material Safety Data Sheet (MSDS) for any
working fluid(s) and comply with recommended safety equipment.
Start-up
Automotive
Applications
iv
Be prepared to make an emergency shutdown when starting the
engine, turbine, or other type of prime mover, to protect against
runaway or overspeed with possible personal injury, loss of life, or
property damage.
On- and off-highway Mobile Applications: Unless Woodward's control
functions as the supervisory control, customer should install a
system totally independent of the prime mover control system that
monitors for supervisory control of engine (and takes appropriate
action if supervisory control is lost) to protect against loss of engine
control with possible personal injury, loss of life, or property damage.
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
To prevent damage to a control system that uses an alternator or
battery-charging device, make sure the charging device is turned off
before disconnecting the battery from the system.
Battery Charging
Device
Electrostatic Discharge Awareness
Electrostatic
Precautions
Electronic controls contain static-sensitive parts. Observe the
following precautions to prevent damage to these parts:

Discharge body static before handling the control (with power to
the control turned off, contact a grounded surface and maintain
contact while handling the control).

Avoid all plastic, vinyl, and Styrofoam (except antistatic versions)
around printed circuit boards.

Do not touch the components or conductors on a printed circuit
board with your hands or with conductive devices.
To prevent damage to electronic components caused by improper
handling, read and observe the precautions in Woodward manual
82715, Guide for Handling and Protection of Electronic Controls,
Printed Circuit Boards, and Modules.
Follow these precautions when working with or near the control.
1. Avoid the build-up of static electricity on your body by not wearing clothing
made of synthetic materials. Wear cotton or cotton-blend materials as much
as possible because these do not store static electric charges as much as
synthetics.
2. Do not remove the printed circuit board (PCB) from the control cabinet
unless absolutely necessary. If you must remove the PCB from the control
cabinet, follow these precautions:

Do not touch any part of the PCB except the edges.

Do not touch the electrical conductors, the connectors, or the
components with conductive devices or with your hands.

When replacing a PCB, keep the new PCB in the plastic antistatic
protective bag it comes in until you are ready to install it. Immediately
after removing the old PCB from the control cabinet, place it in the
antistatic protective bag.
Woodward
v
RTCnet / LINKnet HT Nodes
Manual 26640
Regulatory Compliance
European Compliance for CE Marking:
These listings are limited only to those units bearing the CE Marking.
EMC Directive:
ATEX – Potentially
Explosive
Atmospheres
Directive:
Declared to 2004/108/EC COUNCIL DIRECTIVE of 15
Dec 2004 on the approximation of the laws of the
Member States relating to electromagnetic compatibility.
Declared to 94/9/EC COUNCIL DIRECTIVE of 23 March
1994 on the approximation of the laws of the Member
States concerning equipment and protective systems
intended for use in potentially explosive atmospheres (see
also Compliance Notes below).
Zone 2, Category 3, Group II G, Ex nA IIC T4 Gc X
North American Compliance:
These listings are limited only to those units bearing the CSA identification.
cCSAus:
Marine Compliance:
American Bureau of
Shipping:
CSA Certified for Class I, Division 2, Groups A, B, C,
& D, T4 at 100 °C surrounding air temperature. For
use in Canada and the United States.
CSA Certificate 2494650
(see also Compliance Notes below)
ABS Rules 2012 SVR 1-1-4/7.7, 1-1-A3, 4-2-1/7.3
7.5.1; 4-9-3/17, 4-9-4/23 & 4-9-7/Table 9 (As
appropriate)
Det Norske Veritas:
Standard for Certification No. 2.4, 2006:
Temperature Class B, Humidity Class B, Vibration
Class A, EMC Class A, Enclosure B. (PENDING)
Lloyd’s Register of
Shipping:
LR Type Approval Test Specification No. 1, 2002 for
Environmental Categories ENV1, ENV2 and ENV3
(PENDING)
Other Compliance:
These listings are limited to those units bearing the C-Tick mark:
C-Tick (ACA/RSM):
Declared to Australian Radiocommunications Act of
1992 and the New Zealand Radiocommunications
Act of 1989.
Compliance Notes:
This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D T4 at
100 °C surrounding air temperature per CSA for Canada and US or nonhazardous locations only.
This equipment is suitable for use in European Zone 2, Group IIC environments
when installed in an IP54 minimum rated enclosure per self-declaration to
EN 60079-15.
RTCnet and LINKnet HT nodes are open-type equipment that are installed in a
suitable enclosure of final application, with combination subject to acceptance to
the Local Inspection Authority having jurisdiction.
vi
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Field wiring must be in accordance with North American Class I, Division 2 (CEC
and NEC), or European Zone 2, Category 3 wiring methods as applicable, and in
accordance with the Local Inspection Authority having jurisdiction.
The modules must be installed in a vertical position in a enclosure with a
minimum IP54 rating to meet the cyclic Damp Heat requirements of Marine
Agency Type Approval.
Special Conditions for Safe Use:
Field wiring must be suitable for at least 10 °C above ambient conditions during
operation.
This equipment must be installed in an area or enclosure providing adequate
protection against impact and the entry of dust or water.
For ATEX compliance, the user-provided enclosure must have a minimum IP54
ingress protection rating per IEC 60529 and meet the construction requirements
of IEC 60079-15. The interior of the enclosure shall not be accessible in normal
operation without the use of a tool.
EXPLOSION HAZARD—Do not connect or disconnect while circuit is
live unless area is known to be non-hazardous.
Substitution of components may impair suitability for Class I,
Division 2 applications.
RISQUE D’EXPLOSION—Ne pas raccorder ni débrancher
tant que l’installation est sous tension, sauf en cas
l’ambiance est décidément non dangereuse.
La substitution de composants peut rendre ce matériel
inacceptable pour les emplacements de Classe I,
applications Division 2.
Woodward
vii
RTCnet / LINKnet HT Nodes
viii
Manual 26640
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Chapter 1.
General Information
Introduction
Woodward RTCnet and LINKnet HT distributed I/O nodes are small CANopen
based modules designed for turbine control in harsh vibration and temperature
environments.
Woodward Control Systems like MicroNet Plus can easily program these nodes
to gather I/O sensor data from remote locations. Woodward’s GAP Graphical
Application Program software provides automatic node initialization, RateGroup
operation, and diagnostic features when using these nodes to control:

Gas and Steam Turbines

Gas and Diesel Engines

Hydro Turbines
Because RTCnet and LINKnet HT nodes may be skid mounted with the turbine
or engine, typical installation and maintenance costs for cables, sensor wiring,
and field troubleshooting can be significantly reduced.
Product Highlights

Suitable for skid mounted turbine and engine control markets

Designed for high temperature and high vibration operation

RTCnet products are designed for real-time, deterministic operation

LINKnet HT products are designed to support slower, non-critical I/O

Designed for easy integration with Woodward controls like MicroNet Plus

Provides Plug-N-Play integration with Woodward GAP software and
RateGroups

Provides a convenient upgrade path for older LINKnet distributed I/O nodes
Features and I/O

High temperature operating range of –40 °C to +100 °C

High vibration operation for skid mount vibration and shock levels

18 V to 36 V (dc) isolated input power with isolated CAN communications

RT, real-time version with deterministic and synchronous updates of 10 ms
to 160 ms

HT, asynchronous, non real-time version with 100 ms to 1 second update
rates

RTCnet products have (2) CAN ports to support redundant network and
cabling
A MicroNet Plus Control system using RTCnet / LINKnet HT nodes with
Woodward’s GAP software provides a powerful control environment.
Woodward’s unique RateGroup structure ensures that control functions execute
with determinism at intervals defined by the System Engineer. GAP allows critical
control loops to be processed as fast as 5 milliseconds while less critical code is
assigned to a slower execution rate like 160 ms. The RateGroup structure
prevents the possibility of changing system dynamics when adding additional
code so the control functions are always deterministic and predictable.
RTCnet / LINKnet node configuration, diagnostics, and monitoring are provided
through standard MicroNet and GAP tools like Monitor GAP and SOS OPC
server.
Woodward
1
RTCnet / LINKnet HT Nodes
Manual 26640
RTCnet Product Family
RTCnet products are focused on real-time deterministic I/O with redundant CAN
ports. These nodes support MicroNet Plus CPU failover and are designed to
operate in high temperature and high vibration environments.
Node Types

(8ch) RTD Input (100 Ω, 200 Ω)

(8ch) High Accuracy Thermocouple Input (K, N, E, J, R, S, T, B, mV)

(10ch) AIO 4 mA to 20 mA In/Out (8AI, 2AO) (loop & self-power versions)

(16ch) Discrete Input

(16ch) Discrete Out Relay Driver
Figure 1-1. RTCnet, Real-Time
LINKnet HT Product Family
LINKnet HT products provide for slower, asynchronous distributed I/O with a
single CAN port. These nodes support MicroNet Plus CPU failover and are
designed to operate in high temperature and high vibration environments.
Node Types

(8ch) RTD Input (100 Ω, 200 Ω)

(8ch) Thermocouple Input (K, N, E, J, R, S, T, B, mV)

(10ch) AIO 4 mA to 20 mA In/Out (8AI, 2AO) (loop & self-power versions)

(16ch) Discrete Input

(16ch) Discrete Out Relay Driver
Figure 1-2. LINKnet HT Products
2
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Environmental Specifications
These specifications apply to both RTCnet and LINKnet HT product lines.
Operating Temperature
Storage Temperature
–40 °C to +100 °C
–40 °C to +105 °C, recommend 20 °C to 40 °C for
long life
Vibration
8.2 Grms, industrial skid mount, per Woodward RV1
Shock
40 G, 3x each axis, per Woodward MS1
Humidity1
5 % to 95 %, non-condensing
Ingress Rating / Installation2
IP20, Pollution Degree2, Overvoltage Category 3
EMC Emissions
EN 61000-6-4 (Heavy Industrial)
IACS UR E10 (Commercial Marine)
EMC Immunity
EN 61000-6-2 (Heavy Industrial)
IACS UR E10 (Commercial Marine)
1
Cyclic condensing humidity is supported with selection of an appropriate
enclosure
2
ATEX, IP54, and Pollution Degree 3 are supported with an appropriate
enclosure.
Electromagnetic Compatibility (EMC)
The RTCnet and LINKnet HT products comply with Heavy Industrial EMC
requirements per EN 61000-6-4 & EN 61000-6-2 specifications. Marine Type
Approval is also met per IACS UR E10 EMC test requirements.
Emissions EN 61000-6-4 & IACS UR E10

Radiated RF Emissions Limits 150 kHz to 3000 MHz per IEC 61000-6-4 &
Marine Type Approval.

Power Line Conducted RF Emissions Limits 10 kHz to 30 MHz per IEC
61000-6-4 & Marine Type Approval.
Immunity EN 61000-6-2 & IACS UR E10

Electrostatic Discharge (ESD) immunity to ±6 kV Contact, except to I/O pins,
and ±8 kV Air per IEC 61000-4-2

±6 kV Contact to I/O pins, operational with deviations and ±8 kV Package
and Handling without damage.

Radiated RF Immunity to 10 V/m, from 80 MHz to 3000 MHz per IEC
61000-4-3.

Electrical Fast Transients (EFT) Immunity to ±2.0 kV, kHz 5 & 100 kHz rep
rate on I/O and Power input cabling per IEC 61000-4-4.

Surge Immunity (PS) to ±1.0 kV CM and ±0.5 kV DM per IEC 61000-4-5.

Surge Immunity (I/O) to ±1.0 kV CM per IEC 61000-4-5.

Conducted RF Immunity to 10 V (rms) from 150 kHz to 80 MHz per IEC
61000-4-6.

Conducted Low Frequency Injection Immunity to 3.6 V (rms), ≤ 2 W Power,
from 50 Hz to 12 kHz on Power Inputs per Marine Type Approval test
requirements.

Conducted Low Frequency Injection Immunity to 3.6 V to 0.36 V (rms),
≤ (2 to 0.2) W Power, 12 kHz to 150 kHz on Power Inputs, extended from
Marine Type Approval test requirements.
Woodward
3
RTCnet / LINKnet HT Nodes
Manual 26640
Chapter 2.
RTCnet and LINKnet HT Distributed I/O
Networks
Product Compatibility
The RTCnet and LINKnet HT product families are compatible with the MicroNet
Plus simplex and redundant CPU platforms. GAP3.04 and Coder 6.0 or later
software tools are required. Contact Woodward Marketing and Sales for
compatibility with other Woodward products.
Network Wiring Considerations
The CAN network may be routed using either a simple daisy-chain wiring
strategy or a Trunk and daisy-chain wiring strategy. The primary requirement is
that the CAN network is terminated with 120 Ω ±10 Ω resistors at each end of the
“trunk” cable.
For MicroNet CAN cable and connector options see MicroNet manual
26166 and Woodward Reference drawing for CAN/DeviceNet cables
9097-2097.
4
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Network Examples with MicroNet
The following is an example MicroNet Plus, redundant CPU system using
RTCnet and LINKnet HT products. The MicroNet CPU’s are directly connected to
a group of RTCnet nodes and the RTN Gateway is used to interface with (2)
other node groups.
This example shows redundant CPU’s and multiple node locations supported
with Woodward’s RTN Gateway. It also shows redundant RTCnet CAN network
wiring and redundant RTN networking to the RTN Gateway.
Reference information:
 Manual 26640—For RTCnet and LINKnet HT nodes.
 Manual 26166—For MicroNet RTN Ethernet switches and cables.
 Manual 26612—For RTN Gateway information, cables, and setup.
Useful Woodward Part Numbers at the Time of Writing
CAN Cables (reference drawing 9097-2097)
5417-1127
Cable - CAN MicroNet drop, 7/8 inch male to M12 female (1 m)
5417-1142
Cable - CAN drop, 7/8 inch male to pigtail (1 m, mid gauge)
5417-1148
Cable - CAN mid trunk cable (3 m, mid guage)
1635-1463
Connector - CAN network tee, 7/8 inch M/F with F drop
1635-1464
Connector - CAN terminator 7/8 inch, male 121 Ω
1635-1465
Connector - CAN terminator 7/8 inch, female 121 Ω
2008-1512
Cable - CAN RTCnet High Temp (1.5 pair, 0.3 mm² / 22 AWG, 125 °C)
8923-1889
KIT - RTCnet CAN termination resistor (121 Ω, qty 20)
Misc.
5417-394
1752-423
1711-1069
1751-6077
1730-221
1731-757
Woodward
Cable - Double Shielded CAT-5 Ethernet (SSTP), 10 foot
Hirschmann Copper Ethernet switch (RS2-TX, 8 port)
Hirschmann Fiber Optic Switch (RS2-4TX/1FX)
Hirschmann Fiber Optic Switch (RS2-3TX/2FX)
General Purpose Relay (24 V dc, 10 A, "ice cube")
Socket - DIN rail base for relay 1730-221
5
RTCnet / LINKnet HT Nodes
Manual 26640
Network Power Distribution
Power Bus Distribution: The primary power distribution bus should be < 300 m
with a recommended wire size of 3 mm² / 12 AWG or larger. It is expected that it
will be broken out to smaller distribution wires at the final location. Wires should
be routed with positive and negative together, but they don’t need to be twisted.
When the optional EARTH terminal is used at the nodes, it should be routed as
short as possible to an earth/chassis enclosure connection.
Longer cable runs and complex power distribution designs may
require a more detailed power system analysis. For best
performance, it is important to control the total input source
resistance to < 5.4 Ω and total input source inductance to < 300 μH.
Power Wiring to nodes: Wires routed from the main bus to feed the nodes shall
be 0.5 mm² / 20 AWG to allow daisy chaining the power from node to node. It is
recommended that the power daisy chain be limited to 16 nodes of any
combination.
Power Fusing: Breaker or power-line fusing is recommended to protect the
power wiring network from possible wiring shorts. The breaker or fuse rating for a
group of nodes should be at least 1.5 A (time-delay type) per AIO node and
0.75 A (time-delay type) per all other node types to avoid nuisance trips. Due to
the isolated input PS design, each node does not need individual fuse protection,
but should still be fuse protected in strategic groups.
Power Wiring / Shielding: No shield is required, however it is allowed and
beneficial in harsh corrosive environments. If used, it should be EARTH terminated
to a DIN rail or panel connection with as short a wire as possible. See the cable
shield preparation and the node grounding sections for specific guidance.
CAN Network Communications
RTCnet and LINKnet HT nodes communicate with the master controller (i.e.:
MicroNet) using the CAN protocol. Both RTCnet and LINKnet HT nodes support
MicroNet dual CPU’s and failover operation. Note: RTCnet nodes have (2)
redundant CAN ports and LINKnet HT nodes provide only (1) CAN port.
CAN Specifications
Interface Standard
Network Connections
Network Isolation
Network Speed/Length
CAN 2.0B
(2) Redundant CAN ports, separate connectors
500 V (ac) to chassis, input power, I/O channels, between CAN ports
1 Mbit @ 30 m
500 Kbit @ 100 m
250 Kbit @ 250 m (thick cable only, otherwise limited to 100 m)
125 Kbit @ 500 m (thick cable only, otherwise limited to 100 m)
Network Termination:
(120 ± 10) Ω is required at each end of the network trunk line.
**The termination resistor is NOT built into the node hardware.
Node Address
(2) Rotary switches shall configure the node address (range of 1–99).
Baud Rate configuration rotary switch selectable for 125 K, 500 K, 250 K, and 1 Mbit
Cable / Part Number
2008-1512 (120 Ω, 3-wire, shielded twisted pair)
—Belden YR58684 or similar
Cable Drops (1 Mbit)
CAN Cable drops shall be < 1 m and as short as possible
Cable Drops (500K, etc) CAN Cable drops shall be < 6 m and as short as possible
**If needed, a recommended CAN to USB converter is IXXAT, HW221245 (isolated)
6
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
CAN Cable Specifications
Belden YR58684, high temperature communications / CAN cable is approved
and recommended. This is a smaller and more flexible 0.3 mm² / 22 AWG, low
capacitance cable suitable for tight routing between nodes in high temperature
environments.
Belden YR58684, bulk cable (Woodward PN 2008-1512)
Impedance:
DC resistance:
Cable
capacitance:
Data Pair:
Ground:
Drain / Shield
Wire:
Shielding:
Jacket:
Cable type:
Outer Diameter:
Bend Radius:
Temperature:
Similar Cable:
120 Ω 10 % at 1 MHz
17.5 Ω per 1000 ft
11 pF/ft at 1 kHz
0.3 mm² / 22 AWG, 7 strands, individually tinned, FEP insulation
(BLUE, WHITE twisted pair)
0.3 mm² / 22 AWG, 7 strands, individually tinned, FEP insulation (BLACK)
0.3 mm² / 22 AWG, 7 strands, individually tinned
Foil 100 % with outer Braid 65 %
FEP Insulation, BLACK
1.5 pair, twisted shielded
0.244 inch
2.5 inches
–70 °C to +125 °C
Belden 3106A (has different colors & lower temperature specs)
CAN Cable Shield Terminations & Exposed Cable Limitations
For robust communications performance, the CAN cabling needs to minimize the
exposed, non-shielded cable section that occurs at terminal blocks. The exposed
length of CAN wiring must be limited to less than 3.8 cm / 1.5 inches from the
end of the shield to the terminal block. This limits the total length of exposed
wiring during a series or daisy chain connection on each side of the terminal
block to 7.6 cm / 3 inches.
CAN shields are terminated to chassis (EARTH) through a capacitor-resistor
network. This is designed into the RTCnet / LINKnet HT nodes, RTN Gateway,
and MicroNet products. However, the shield must also be directly terminated to
chassis (Earth) at one point in the network. In the case of Woodward equipment,
the direct ground is meant to be located at the master device end, as it exits the
master device’s enclosure.
Always use shielded cables for improved communications in industrial
environments. Wire terminations at the node should expose as little
un-shielded cable as possible (less than 3.8 cm / 1.5 inches).
Woodward
7
RTCnet / LINKnet HT Nodes
Manual 26640
Daisy chaining CAN cables between multiple nodes allows leaving down to (20 to
30) cm / (8 to 12) inches of shielded cable between each node, a violation of the
standard practice with shielded cable terminal block shield breaks listed below.
(The shield break is not a stop of the shield. It is reducing the full shield
encompassing internal wires to a single wire to pass through or connect to the
terminal block.) This is acceptable for CAN only at the nodes, as long as the
cable from the terminal block closest to the main exit entrance point of the
enclosure is at least 1 m / 39 inches long before another terminal block break in
the full shielding of the cable wires. The individual shield caps in the nodes add,
to provide low impedance shield terminations. Shield brakes not at the node
terminal blocks should be minimized, and may have additional coupling
capacitors to earth as noted below in the general wiring section (if desired,
implement with great care).
8
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Chapter 3.
Installation
Introduction
This chapter provides the general information for mounting location selection,
installation, and wiring of the RTCnet and LINKnet HT distributed I/O node
modules. Hardware dimensions, ratings, and requirements are given for
mounting and wiring the control in a specific application.
Each type of I/O node is physically similar, only the High Accuracy Thermal
couple I/O nodes are different sized. In addition, each node type has the same
power input and CAN cabling options. The two families of Distributed I/O have
two differences in CAN: RTCnet has two redundant CAN ports synchronized for
real-time communication and LINKnet HT has a single CAN port that is not real
time capable.
Basic installation guidance is given within this chapter, but specific requirements
are given with each type of distributed I/O node.
Shipping Carton
Before unpacking the I/O nodes, refer to the inside front cover and page vi of this
manual for WARNINGS and CAUTIONS. Be careful when unpacking the I/O
node. Check for signs of damage such as bent or dented panels, scratches, and
loose or broken parts. If any damage is found, immediately notify the shipper.
The node was shipped from the factory in an anti-static foam lined carton. This
carton should always be used for transport of the I/O node or for storage when it
is not installed in the system.
General Installation
When selecting a location for mounting the I/O Nodes, consider the following:

Protect the unit from direct exposure to water or to a condensation-prone
environment.

The control is designed for installation in a protective metal enclosure such
as a standard cabinet with ingress protection rating of IP54 or greater for
Hazardous locations.

Provide an ESD strap or other discharge methods as ESD mitigation inside
the cabinet; it must be used for handling the equipment and
plugging/unplugging the connectors.

Provide adequate ventilation for cooling. Mount in a location that is able to
maintain an ambient operating temperature within the range of rated
maximum and minimum ambient temperatures. Shield the unit from radiant
heat sources as needed to maintain ambient temperature within the rated
range.

Do not install the unit or its connecting wires near inductive, high-voltage, or
high-current devices. If this is not possible, shield both the system
connecting wires and the interfering devices and/or its wires.

Allow adequate space around the unit for air flow, servicing, and wiring.

Do not install where objects can be dropped on the terminals or inside the
unit.
Woodward
9
RTCnet / LINKnet HT Nodes

Manual 26640
Ground the chassis for proper safety and shielding effectiveness. The DIN
Rail connector is designed to be the main functional ground for RF. The
optional power input ground wire may be, and is recommended to be,
grounded too if corrosion or significant vibration may be present. A DIN Rail
mounted grounding terminal block connected to the power port ground pin
by as short and large gage wire as possible is recommended.
Mounting Requirements
The nodes are DIN rail mounted, using the DIN Rail as the primary source of
chassis ground. The DIN Rail must be connected to EARTH ground as with the
enclosure and mounting plate for the DIN rail.
DIN rails must have mounting screws to bolt down and bond to the mounting plate at
least every 6–8 inches, (15–20 cm) or ~1–2 inches (~2.5–5 cm) in on each end if the
DIN rail is shorter than ~12 inches (30 cm). This provides stability and grounding
paths. In addition to the DIN rail grounding, in some environments it is required to
add the supplemental ground wire connection from the power port to earth.
The nodes may be mounted in any orientation necessary. However
for best accuracy, the T/C Thermocouple nodes should be mounted
in an upright-vertical position.
Nodes should maintain at least 8 cm / 3 inches between them on the long edge
and may be flush mounted against each other on the short edge. When using the
T/C High Accuracy node, plan for an additional 2 cm / 0.75 inch for the I/O wiring
clamp.
Mounting of the units must be such that the Power and CAN cabling are
restrained to be directly against the earth grounded metal mounting plate. Since
power is not required to be shielded and daisy chained CAN breaks the shield at
regular intervals, it is advisable to either segregate power and CAN as possible
or shield the power port cabling. The design is expected to have power and CAN
be directly restrained to the mounting plate, so they are flush against it for as
much length as possible outside the service loop. (The Service loop should be as
short as possible too.)
The I/O cabling is intended, but not required, to be segregated from the CAN and
Power wiring, this may be accomplished by aligning two rows next to each other
and placing the CAN and power bus wiring between them, restrained to the
mounting plate in two separate rows, Field I/O cables staying on the outside of
the two rows of nodes. This mounting scheme can be repeated to keep field I/O
together and away from CAN and Power bus wiring. If not shielded, segregation
of DI & DO field wiring is strongly suggested due to switching arc noise on relay
contacts and the transient pulse due to relay coil current stored energy.
It is recommended that unshielded and shielded field I/O cabling also be
segregated to the extent possible. Specifically DI & DO cabling routed away from
other cabling, due to the noise it can generate or couple as noted above.
10
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
General Notes:
Terminal blocks are Phoenix MCVR series for all products except High Accuracy
T/C
Plug Type is side entry, 3.5 mm, latching screw-down for all nodes except High
Accuracy T/C
Max wire size: 1.3 mm² / 16 AWG for single wires, 0.5 mm² / 20 AWG for two
wires
Voltage / Current Rating: 300 V, 8 A
A small flathead screw-driver (0.4mm wide blade) is required for all terminal
blocks.
—Example: Woodward PN 8992-005 (WAGO 210-619, 2.5 mm x 0.4 mm blade)
High Accuracy T/C Node
High Accuracy T/C node channels 1–8 use fixed (non-pluggable) 3.5 mm
terminal blocks, screw-down for improved cold-junction compensation. The max
wire size is 1.3 mm² / 16 AWG for single wires.
Compatibility with Older LINKnet Product Line
The RTCnet / LINKnet HT communication protocol, cabling, and termination
design is NOT compatible with the older LINKnet.
RTCnet / LINKnet HT nodes are smaller than the original LINKnet nodes. The
length is about 2” (5cm) shorter and the width is about 0.1” less (except for the
T/C High Accuracy node which is approx 0.5” wider with the wiring clamp).
RTCnet / LINKnet HT uses smaller 3.5mm pitch connectors than the older 5mm
products. RTCnet / LINKnet HT allows a max size single wire of 1.3 mm² /
16 AWG wire. The older product LINKnet terminal blocks (5 mm) allow for a
single 2 mm² / 14 AWG wire.
Terminal block wiring must use multi-stranded wires to provide best
results. Due to the clamping action of screw-down and spring-loaded
terminal blocks, lower voltage level signals like TC and RTD input are
susceptible to glitches when using single “solid-core” wires.
Do not tin (solder) the wires that terminate at the node terminal
blocks. The spring-loaded CageClamp or screw down terminal
blocks are designed to flatten stranded wire, and if those strands are
tinned together, the connection loses surface area and is degraded.
The solder tinned wire end will also cold flow over time potentially
further degrading or break the connection.
CAN NETWORKS. It is possible to disrupt an existing CAN network
by attaching an improperly configured device. To prevent problems
on your existing network(s), read this chapter before connecting an
RTCnet or LINKnet HT Node to a network.
Woodward
11
RTCnet / LINKnet HT Nodes
Manual 26640
Outline Drawing for Nodes
The physical outline dimensions for RTCnet and LINKnet HT nodes are shown
below using a generic RTCnet node drawing. See Woodward Reference drawing
9989-1169 for additional details if necessary. Note: The T/C High Accuracy node
outline drawing is slightly different because of the wiring gland plate and is show
in the next section.
Figure 3-1. RTCnet and LINKnet HT Node Outline Drawing
12
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Outline Drawing for T/C High Accuracy Node
The physical outline dimensions for the T/C High Accuracy node is shown below
and is slightly different because of the I/O wiring gland plate. See Woodward
Reference drawing 9989-1169 for additional details if necessary.
Figure 3-2. T/C High Accuracy Node Outline Drawing
Woodward
13
RTCnet / LINKnet HT Nodes
Manual 26640
Recommended Grounding Practices
Each type of the I/O nodes must be grounded to earth by the DIN rail. The DIN
Rail and mounting plate must be bonded to ground. The DIN Rail connector is
designed to be the main functional ground for the units.
The optional power input ground wire may be, and is recommended to be,
grounded too if corrosion or significant vibration may be present. A DIN Rail
mounted grounding terminal block connected to the power port ground pin by as
short and large gage wire as possible is recommended.
Input power ground terminal, not power return, should be wired / bonded to earth
ground in applicable cases like environments that lead to corrosion or hazardous
atmosphere environments.
General Wiring Guidance
Shielded Wire, Shield Termination Lead Preparation
Where shielded cable is required, cut the cable to the desired length and prepare
the cable as instructed below.
1. Strip outer insulation from both ends, exposing the braided or spiral wrapped
shield. Do not cut the shield or nick the wire inside the shield.
2. Using a sharply pointed tool, carefully spread the strands of the braided
shield to form a hole.
3. Take hold of the inner conductor(s) wire’s insulation and pull the wires out of
the shield one at a time.
a. If the shield is the braided type, twist the braid it to prevent fraying;
twist it with the drain wire if one is present. Use as much of the shield
braid and drain combined as possible to terminate the shield.
b. Foil shields or shields of foil combined with braid require the drain to
be brought out and excess foil may be removed.
4. Remove 6 mm (1/4 inch) of insulation from the inner insulated signal
conductors.
5. Connect wiring and shield as shown in plant wiring diagram.
6. If a shield connection is not required or desired, fold back and secure or
remove the excess shield as needed. (If there is a landing/connection point
for the shield, it should be used to get optimal signal performance.)
General Wiring Installation
All signal lines except power supply, Discrete Input and Discrete Output, wiring
should be shielded to prevent picking up stray signals from adjacent equipment.
These may also be shielded if desired.
For noise suppression reasons, it is recommend that all low-current and low
voltage wires be separated from all high-current and/or high-voltage wiring.
Strain relief is recommended for cables. In general strain relief of cables is a wise
practice.
Input power ground terminal, not power return, should also be wired / bonded to
earth ground in applicable cases like environments that lead to corrosion or
hazardous atmosphere environments.
14
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
All shielded cable must be twisted conductor pairs, triples or multiple pairs. The
nodes are designed with AC (Capacitor) and direct shield terminations to earth
ground at the cable landing points to facilitate shield termination.
Installations with severe electromagnetic interference (EMI) and maintaining
electromagnetic compatibility (EMC) may require additional shielding
precautions, such as wire run in conduit or double shielding. In general the
devices are designed with a level of immunity to EMI and to maintain EMC for the
typical installation environment and added pre cautions are not needed. Contact
Woodward for more information.
In general shields are intended to be terminated to their landing point on the
RTCnet or LINKnet HT nodes. They may also be required to be landed /
terminated at the opposite end.
Shields from the node to its loads or input sources can be directly grounded to
earth at both ends, but only if the cable length is sufficiently short to prevent
ground loop current in the shield. (e.g. Shields within a single cabinet or where
the shortest straight line distance between shield to chassis/earth connection
points is no further than 10 m to 30 m apart).
If long cables are used where termination end point separations are greater than
10 to 30 m, and both shield ends must be terminated, a capacitor must be used
at one end to terminate the shield to earth/chassis. The preferred point for the
capacitor is at the remote end, but individual device sensitivity makes this a
determinative process, to find the end most applicable to using it. Using a
0.01 μF, 1500 V, capacitor is typically sufficient.
If intervening terminal blocks are used in routing a shielded signal cable, the
shield should be continued through the terminal block. If shield grounding is
desired at the terminal block, it should be AC (capacitor) coupled to earth. It is
suggested to limit the number of TB break points along the cabling between the
field device end and node end to a minimum, zero would be best. In general, at
least 39 inches (1 m) of cable with an intact shield should present between
breaks in the shield. Daisy chained CAN drop cabling has an exception.
Multiple, spread out, direct or high capacitance connections of a shield to earth
should be avoided. Multiple connections of shielding runs the risk of high levels
of low frequency ground current, like 50/60 Hz, flowing within the shield. If there
are multiple connections made, add the impedance of them up and make sure it
is much greater than safety grounds impedance required by local laws.
Shielding and Enclosure Installations: If the device is installed in a metal
enclosure, as expected and intended by hazardous location installations,
shielded I/O must be AC or DC terminated directly to the enclosure (earth
ground) at the entry to the enclosure, as well as at the intended shield pins on
the nodes.
As noted, shield termination can be a deterministic process. AC shield
connections (capacitors) on shield I/O may be dictated at the node, instead of the
direct earth connection provided. Typically, shields at signal inputs are connected
directly to earth, and shields at signal outputs are AC-coupled to earth or floating.
All shields from the nodes, except CAN are designed directly terminated to earth
/ chassis. See Woodward application notes 50532, Interference Control in
Electronic Governing Systems, and 51204, Grounding and Shield Termination,
for more information.
Specifics are provided in each individual installation section.
Woodward
15
RTCnet / LINKnet HT Nodes
Manual 26640
Node Replacement / HotSwap
EXPLOSION HAZARD—Do not connect or disconnect while circuit is
live unless area is known to be non-hazardous.
Substitution of components may impair suitability for Class I,
Division 2 applications.
RISQUE D’EXPLOSION—Ne pas raccorder ni débrancher
tant que l’installation est sous tension, sauf en cas
l’ambiance est décidément non dangereuse.
La substitution de composants peut rendre ce matériel
inacceptable pour les emplacements de Classe I,
applications Division 2.
For simplex systems this procedure will SHUTDOWN the control
system.
CAN NETWORKS. It is possible to disrupt an existing CAN network
by attaching an improperly configured device. To prevent problems
on your existing network(s), read this chapter before connecting an
RTCnet or LINKnet HT Node to a network.
A faulty RTCnet / LINKnet HT node can be replaced using the following steps.
Configure the new replacement node:

Set the new node address and baud rate to match the faulty node.
Remember the node address and use it in GAP to verify that you are
initializing the proper module.
Removal of faulty node:

Disconnect the POWER from the faulty node

Disconnect the CAN1 and/or CAN2 ports from the faulty node

Disconnect the I/O wiring from the faulty node

Carefully remove the faulty node from the DIN rail
Installation of new replacement node:

Install the replacement node onto the DIN rail

Re-Connect the I/O wiring from the faulty node

Re-Connect the CAN1 and/or CAN2 ports to the faulty node

Re-Connect the POWER to the faulty node
Node Initialization:

Use GAP to initialize and reset the node (NODE_INIT). Remember the node
address / ID and use it in GAP to verify that you are initializing the proper
module.

Verify the node FAULT led clears properly

Verify proper GAP operation
16
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Commissioning Checklist
Power checks

Verify proper polarity on power connections

Verify power source and wire size is sufficient for all loads

Verify input power is 18 V to 36 V (dc) with < 1.5 V (rms) ripple

Verify PS(+) and PS(–) impedance to EARTH is > 10 MΩ

Entire power network source resistance should be < 5.4 Ω

Entire power network source inductance should be < 300 μH
CAN checks

Verify CANH is not connected to PS(+), PS(–), EARTH

Verify CANL is not connected to PS(+), PS(–), EARTH

Verify CAN_COM is not connected to PS(+), PS(–), EARTH

Verify CAN shield wire is not shorted to PS(+), PS(–)

Verify CAN network length is < max length spec for the baud rate being
used

Verify CAN drop cables to each node are as short as possible and meets
spec.

Verify both ends of each CAN network is terminated with 121 Ω between
CAN-H and CAN-L wires.

Verify the CAN network uses 3-wires (CAN-H, CAN-L, and CAN_common)
with shielding

Verify CAN cable is 2008-1512 (Belden YRxxx) or equivalent low
capacitance, shielded communications wire.

Verify the CAN overall cable shield is terminated to EARTH at only (1)
location for each network. This should be located at the master control
(MicroNet) as the cable exits the control cabinet.

For redundant nodes, verify CAN1 and CAN2 networks are not miswired
and connected together.
DI, Discrete Input wiring checks

Verify each DI(+) is not shorted to another input.

Verify each DI(+) is not shorted to CPWR(+), CPWR(–), PS(+), PS(–),
EARTH.

Verify each DI(+) wiring is functional by setting each input HIGH (>16 V DC)
and then LOW (<8 V DC). Verify GAP software detects the state change.

When possible, consider using a shielded DIN cable.
DI, Contact Power (CPWR) wiring checks

CPWR(+) is an output voltage, it should never be connected to any other
supply.

To maintain node isolation, verify CPWR(–) is not shorted to PS(–).

Using the internal isolated Contact Power output (CPWR,COM) is highly
recommended to maintain node-to-node isolation.

Verify CPWR(+) is not connected to CPWR(–), PS(–), EARTH.

Verify CPWR(–) is not connected to CPWR(+), PS(+), EARTH.

Verify CPWR voltage level is correct (18 V to 36 V DC).
Woodward
17
RTCnet / LINKnet HT Nodes
Manual 26640
DO, Discrete Output wiring checks

Verify each DO(–) is connected to the COIL POWER SOURCE (common)
properly.

Verify each DO(+) output is connected to the COIL LOAD properly.

Verify each DO(+) is not shorted to another output channel.

Verify each DO(+) is not shorted to DO(–), PS(+), PS(–), EARTH.

Functionally verify each DO(+) wiring by driving each output ON then OFF.
Verify the GAP software detects the readback state change.

When possible, consider using a shielded DOUT cable.
TC, Thermocouple Input wiring checks

Verify each TC(+,–) is not shorted to another input channel.

Verify each TC(+) terminal is not shorted to PS(+), PS(–), EARTH.

Verify each TC(–) terminal is not shorted to PS(+), PS(–), EARTH.

Verify each TC shield wire is not shorted to PS(+), PS(–).

Verify no wires are landed accidently on the NC, no-connect terminals.

Verify each TC shield wire is terminated at the node properly.

Functionally verify the wiring for each TC channel using a simulator source.

TC OPENS: A TC input will read MAX DegC if the (+) or (–) wire is broken /
open.

TC SHORTS: A TC input will read 0 DegC if the (+) and (–) wires are
shorted.
GROUND FAULTS: Input channels accidently shorted to EARTH will
be more susceptible to spurious noise events related to the
installation and environment.
RTD, Input wiring checks

Verify each RTD(+,–) is not shorted to another input channel.

Verify each RTD(+) terminal is not shorted to PS(+), PS(–), EARTH.

Verify each RTD(–) terminal is not shorted to PS(+), PS(–), EARTH.

Verify each RTD(sense) terminal is not shorted to PS(+), PS(–), EARTH.

Verify each RTD(sense) terminal is connected properly for 3-wire sensors.

Verify each RTD(sense) terminal is jumpered to RTD(–) for 2-wire sensors.

Verify each RTD shield wire is not shorted to PS(+), PS(–).

Verify each RTD shield wire is terminated at the node properly.

Functionally verify the wiring for each RTD channel using a simulator
source.

RTD OPENS: RTD channels will read MAX DegC if the (+) or (–) wire is
broken.
AI(non-loop), Analog Input wiring checks

Verify that external XDCR's are NOT used with these self-powered
channels.

Verify each AI(+,–) is not shorted to another input channel.

Verify each AI(+) terminal is not shorted to PS(+), PS(–), EARTH.

Verify each AI(–) terminal is not shorted to PS(+), PS(–), EARTH.

Verify each AI shield wire is not shorted to PS(+), PS(–).

Verify each AI shield wire is terminated at the node properly.

Functionally verify the wiring for each AI channel using a simulator source.
18
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
AI LOOP, Analog Input wiring checks

Verify that external XDCR's are connected to these channels.

Verify the LPWR voltage level (+22 V DC) is correct for the XDCR.

If the XDCR needs loop power common, use the LOOP_GND terminal.

Verify each LPWR(+) terminal is wired to the XDCR POWER(+).

Verify each LPWR(+) terminal is not shorted to PS(+), PS(–), EARTH.

Verify each AI(–) terminal is not shorted to PS(+), PS(–), EARTH.

Verify each AI shield wire is not shorted to PS(+), PS(–).

Verify each AI shield wire is terminated at the node properly.

Verify that all XDCR's for one node use less than 250 mA of LPWR.

Functionally verify the wiring for each AI channel using a simulator source.
AO, Analog Output wiring checks

Verify each AO(+,–) is not shorted to another output channel.

Verify each AO(+,–) is not shorted to another Analog Input channel.

Verify each AO(+) terminal is not shorted to PS(+), PS(–), EARTH.

Verify each AO(–) terminal is not shorted to PS(+), PS(–), EARTH.

Verify each AO shield wire is not shorted to PS(+), PS(–).

Verify each AO shield wire is terminated at the node properly.

Functionally verify the wiring for each AOUT by driving 4 mA and 20 mA to
the load from the GAP application. Verify the RDBK value and correct load
current.
Woodward
19
RTCnet / LINKnet HT Nodes
Manual 26640
Chapter 4.
RTD Nodes (8ch)
Description and Features
The RTD node is a CANopen based distributed I/O module that interfaces to
either a Woodward RTCnet or LINKnet HT network. RTCnet products are
designed for synchronous real-time/deterministic operation whereas LINKnet HT
products are designed for slower asynchronous networks.
This module provides (8) channels of I/O monitoring for 100 Ω and 200 Ω
resistive temperature devices. Both European (alpha=0.00385) and American
(alpha=0.00392) curve types are supported.
Features

(8) RTD Input Channels, 15 bit resolution

RTD sensor types (100 Ω, 200 Ω, and ohms)

RTD curves (European alpha 0.003850, American alpha 0.003920)

High accuracy with automatic temperature compensation

High temperature/reliability design for 100 °C environments

High vibration design suitable for industrial turbine/engine skid-mounting

Designed for operation with MicroNet Plus and redundant CPU failover

Woodward GAP block, diagnostics, and configuration support

3-way isolated design separating power, communications, and inputs
CAN Communications (isolated)

Baud rate configuration for 1 Mbit, 500 Kbit, 250 Kbit, and 125 Kbit

RTCnet supported GAP update rates of 20 ms, 40 ms, 80 ms, 160 ms

LINKnet HT supported GAP update rates of 100 ms, 200 ms, etc (up to
1 second)
20
RTCnet, Real-Time
LINKnet HT, Non Real-Time
(2 isolated CAN ports)
(1 isolated CAN port)
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Block Diagram
Specifications
Environment
Operating Temperature
Storage Temperature
Vibration
Shock
Ingress Rating / Installation
EMC Emissions
EMC Immunity
–40 °C to +100 °C
–40 °C to +105 °C, recommend 20 °C to 40 °C for
long life
8.2 Grms, skid mount, per Woodward RV1
40 G, 3x each axis, per Woodward MS1
IP20, Pollution Degree 2, Overvoltage Category 3
EN 61000-6-4 (Heavy Industrial)
IACS UR E10 (Commercial Marine)
EN 61000-6-2 (Heavy Industrial)
IACS UR E10 (Commercial Marine)
Input Power
Input Power (watts)
Input Voltage (DC)
Input Voltage (AC ripple)
Input Isolation
Overvoltage Protection
Wire size (to node)
Wire size (main distribution)
Wiring & Source Impedance
Woodward
5.0 W max
(18 to 36) V (dc)
< 1.5 V (ac), 50 Hz to 1 kHz
500 V (ac) to chassis, CAN1, CAN2, and I/O
channels
±60 V (dc), includes reverse polarity protection
0.5 mm² / 20 AWG for two wires
1.3 mm² / 16 AWG max for single wires
< 300 m, 3 mm² / 12 AWG or larger
< 5.4 Ω, 300 μH max
21
RTCnet / LINKnet HT Nodes
Manual 26640
Functional
Number of channels
Input Range
Input RTD Type
Engineering Units
RTD Excitation Current
Hardware filter
Accuracy Signal Range
Accuracy (–40 °C, +100 °C)
High Accuracy(–20,+80 °C)
Resolution
8
(0 to 600) Ω
100 Ω, 200 Ω (2 & 3 wire, European & American curves)
°C, °F, or ohms (default = °C)
0 V channel to channel
500 V (ac) to chassis, input power, CAN1, and CAN2
1 mA
2 poles @ ~10 ms
–100 °C to upper curve limit
±2 °C
±1.1 °C for signals between –100 °C and 150 °C
< 0.1 °C (~15 bits)
CMRR over temp
CMVR
Internal Temp Sensor
Miswire protection
Over-voltage protection
> 110 dB @ 50/60 Hz, 140 dB typical
±10 V (dc) to dgnd
±1.0 °C typical (value available thru CANbus)
reverse polarity, short-circuit to earth / each other
± 36 V (dc)
Channel Isolation
Some degraded performance may occur on RTD inputs in the
presence of energy from transmitters such as cell phones or push to
talk (PTT) radios. The units herein are designed to have a level of
protection from interference typically in the environment without
degradation, however not all situations can be anticipated. Degraded
performance, if present, will be in the form of a change in the
accuracy of the measured temperature. It is recommended that
operation of such devices be kept more than 1 meter (3 ft) from the
RTCnet or LINKnet HT to prevent any possible degradation.
Intentional or unintentional grounding, also called “EARTHING”, of
the RTD sensor may reduce the accuracy of the inputs due to ground
loop noise flowing in the wiring. In general common mode noise
riding on the earth ground will degrade performance, depending on
the noise present, up to damaging them. EARTHING, intentional or
unintentional, provides a path for transients (ground bounce
transient currents) or RF noise to flow through the input, either from
or to the remote earthing connection. The RTD and TC inputs are
designed to survive a limited level of transient noise with intentional
or unintentional grounding, or EARTHING, of the inputs. This is
limited to transient pulses, as defined in the surge specification IEC
61000-4-5, of ±1 kV with respect to the remote ground injected into
the local chassis ground.
22
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
If the RTD sensor grounding is intentionally used, maintaining short
RTD cable lengths is recommended; this will aid in reducing the
effect of ground loop noise and limit the transient voltage potential
that may be developed. The recommended distance is less than 10
up to 30 m separation, for furthest two separated points in the subsystem. Placing one set of earthed sensors at 30 m from the node
and another set of earthed sensors 30 m in the opposite direction is
an example violation. That is, the shortest straight line distance
between the grounded sensors is 60 m is a violation of this
recommendation.
Determining acceptability of deviations due to ground noise is
deterministic. Earth noise due to large currents or voltages may be
present, depending on the location in the system.
Determining acceptability of transient noise may be due to indirect
lightening strikes and is determined by the level of building structure
that is provided for shelter and continuity (conductivity) of the
earthing system, voltage peak = Current peak * ground resistance. In
the case of a motor transient the peak current may be a few hundred
amps, in the case of lightening transients this may be up to ~200,000
amps. With a ±1000 V limited design and a 200 kA transient, the earth
ground impedance must be less than 5 milliohms.
Mixing of earth grounded and non-earth grounded RTD or TC
sensors in the same node will degrade the performance of all sensor
inputs; however length limitations only apply to the straight line
distances from the grounded sensors to the nodes or to each other,
whichever is further.
Channel to channel isolation is limited, unused inputs should be
shorted at the node terminal blocks to provide known values and
limit spurious noise from coupling to the unused inputs and
propagating.
RTD Curve Limits
RTD Range Limits (Ω and °C)
RTD Type
100 Ω, E
100 Ω, A
200 Ω, E
200 Ω, A
SpecLohms
18.49
17.00
37.04
33.992
SpecUohms
390.48
396.30
594.97
602.81
SpecLDegC
-200
-200
-200
-200
SpecUDegC
850
850
550
550
RTD Curve Types
European curve (100 EU, 200 EU)
per IEC 60751 spec
R0 =100 Ω or 200 Ω platinum
coeff_A=3.9083E-3, coeff_B=-5.775E-7
coeff_C=-4.183E-12
resulting ALPHA coefficient is 0.003850
Woodward
American curve (100 US, 200 US)
per ITS-90 update
R0 =100 Ω or 200 Ω platinum
coeff_A=3.9848E-3, coeff_B=-5.8700E-7
coeff_C=-4.0000E-12
resulting ALPHA coefficient is 0.003920
23
RTCnet / LINKnet HT Nodes
Manual 26640
Configuration
Rotary switches are provided to configure the Network Address and Baud Rate
(125K, 250K, 500K, 1 Mbit). The Network Address (Node ID) is configurable
from 1-99 using the x10 and x1 rotary switches. For example, to configure node
29 address set x10=2 and x1=9.
Software Configuration: Woodward’s GAP application is a block language
programmer tool that provides specific blocks for each node type. GAP blocks
exist to configure and monitor the node channels, update rates, and faults.
Connector Pinouts
Input Power
Power is provided through a 3 position, latching terminal block with removable
plug.
Board Connection
PIN Color
Description
1
EARTH
Optional earth / shield connection
2
BLACK
Input Power (–)
3
RED
Input Power (+)
Plug Type: Side entry 3.5 mm, 8 A, pluggable with latching screw down
Max wire size: 1.3 mm² / 16 AWG for single wires, 0.5 mm² / 20 AWG for two wires
Figure 4-1. Input Power Connector Pinout
CAN Port(s)
Every RTCnet/LINKnet HT node provides a CAN1 communication port
(5-position, latching) for network communications. Removable mating plug(s) are
provided for field wiring.
RTCnet, real-time nodes provide an additional CAN2 connection for those
systems that require redundant network wiring. The redundant CPU’s in a
MicroNet Plus Control will control both ports properly during CPU failover events.
Board Connection
PIN Color
Description
1
BLACK CAN Signal Ground
2
BLUE
CAN Low
3
Shield
CAN Shield (30 Meg + AC coupled to EARTH)
4
WHITE CAN High
5
n/a
Not used, no internal connection
Plug Type: Side entry 3.5 mm, 8 A, pluggable with latching screw down
Max wire size: 1.3 mm² / 16 AWG for single wires, 0.5 mm² / 20 AWG for two wires
Figure 4-2. CAN Connector Pinout
CAN networks must include a 120 Ω termination resistor at each end of the trunk
line. It is recommended to design the network trunk to be less than 100 meters
with a max cumulative drop length of less than 39 meters. Drop cables
connecting a device to the trunk line should be as short as possible and much
less than 6 meters. For 1 Mbit/s communication each drop cable must be less
than 1 meter.
24
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Field Wiring and Diagrams
General Wiring Recommendations

RTD Inputs: Use 0.5 mm² / 20 AWG, 3-wire, shielded twisted pair cable
(<300 m)

Power: Use 0.5 mm² / 20 AWG, 2-wire cable. Limit daisy chains to 16 nodes

CAN: Use Belden YR58684, 0.3 mm² / 22 AWG, 3-wire comms cable
(2008-1512)

CAN Terminations: Use 120 Ω ± 10 Ω at each end of the network

CAN Stub Lengths: Short as possible (< 1 meter is best)

Shielding: All CAN and I/O signals must be shielded for best performance

EARTH Connections: The DIN-rail clip is the primary earth connection. The
PE connection should be used when required for harsh environments where
the DIN-rail ground may be compromised over time.
RTD wiring connections
Wiring Block Diagram (3-wire sensor)
Wiring Block Diagram (2-wire sensor)
Woodward
25
RTCnet / LINKnet HT Nodes
Manual 26640
Status Indicators and Trouble Codes
Each node displays a green CPU LED and a red FAULT LED to help in
troubleshooting if the module has a problem.
CPU (green): This indicates the CPU has power and is capable of running. It
also indicates that the firmware is correct for the board. For long term reliability
reasons, this LED is dimmer at high temperatures and turned OFF for high
temperature, out of spec conditions.
FAULT (red): A solid red LED indicates that the node has not been initialized by
the Network Master. A flashing red LED indicates a CAN communication fault or
hardware problem. A table of fault LED flash-codes is shown below:
RTD Fault / Status The Node is not initialized or is in a pre‐operational state
CAN ‐ CORE_SYNC_ERR CAN ‐ COMMUNICATION_CAN_ALL_ERR
CAN1 ‐ COMMUNICATION TX ERROR CAN1 ‐ COMMUNICATION RX ERROR CAN1 ‐ COMMUNICATION BUS OFF ERROR
CAN1 ‐ COMMUNICATION_WARNING_LIMIT_REACHED ERROR
CAN1 ‐ CORE_TIMESTAMP_VALUE_ERR
CAN ‐ COMMUNICATION_BAUD_RATE_ERR
CAN2 ‐COMMUNICATION_NODE_ID_ERR
CAN2 ‐COMMUNICATION TX ERROR CAN2 ‐COMMUNICATION RX ERROR CAN2 ‐COMMUNICATION BUS OFF ERROR
CAN2 ‐COMMUNICATION_WARNING_LIMIT_REACHED_ERROR
APP_CHANNEL0_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL1_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL2_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL3_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL4_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL5_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL6_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL7_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL0_SENSOR_HIGH_LIMIT_ERR
APP_CHANNEL1_SENSOR_HIGH_LIMIT_ERR
APP_CHANNEL2_SENSOR_HIGH_LIMIT_ERR
APP_CHANNEL3_SENSOR_HIGH_LIMIT_ERR
APP_CHANNEL4_SENSOR_HIGH_LIMIT_ERR
APP_CHANNEL5_SENSOR_HIGH_LIMIT_ERR
APP_CHANNEL6_SENSOR_HIGH_LIMIT_ERR
APP_CHANNEL7_SENSOR_HIGH_LIMIT_ERR
26
FlashCode Solid Red 1,1
1,2
1,3
1,4
1,5
1,6
1,7
2,1
2,2
2,3
2,4
2,5
2,6
4,01
4,02
4,03
4,04
4,05
4,06
4,07
4,08
4,09
4,10
4,11
4,12
4,13
4,14
4,15
4,16
Woodward
Manual 26640
CORE_EEPROM_WRITE_ERR
CORE_EEPROM_READ_ERR
CORE_PARAMETER_ERR
CORE_PARAMETER_VERSION_ERR
CORE_STACK_OVERFLOW_WARNING_ERR
CORE_SENCE_5V_RANGE_ERR
CORE_SENCE_12V_RANGE_ERR
CORE_SENCE_m12V_RANGE_ERR
CORE_SENCE_5VA_RANGE_ERR
CORE_SENCE_3p3V_RANGE_ERR
CORE_SENCE_1p8V_RANGE_ERR
CORE_INTERNAL_ADC_ERR
CORE_LOW_VOLTAGE_RESET_ERR
APP_EXTERNAL_ADC_ERR
Woodward
RTCnet / LINKnet HT Nodes
8,01
8,02
8,03
8,04
8,05
8,06
8,07
8,08
8,09
8,10
8,11
9,1
9,2
9,9
27
RTCnet / LINKnet HT Nodes
Manual 26640
Chapter 5.
Thermocouple Nodes (8ch)
Description and Features
The T/C (thermocouple) node is a CANopen based distributed I/O module that
interfaces to either a Woodward RTCnet or LINKnet HT network. RTCnet
products are designed for synchronous real-time/deterministic operation whereas
LINKnet HT products are designed for slower asynchronous networks.
This module provides (8) channels of I/O monitoring for many different
thermocouple types. Automatic temperature drift and cold-junction compensation
is standard. RTCnet, T/C High Accuracy nodes provide automatic cold-junction
compensation using (8) different sensors (one for each channel). LINKnet HT
T/C nodes provide automatic cold-junction compensation using (2) sensors.
Features

(8) T/C Input Channels, 15 bit resolution, fail high

T/C sensor types (K, J, T, B, E, N, R, S, and mV)

High accuracy with automatic cold-junction and temperature compensation

High temperature/reliability design for 100 °C environments

High vibration design suitable for industrial turbine/engine skid-mounting

Designed for operation with MicroNet Plus and redundant CPU failover

Woodward GAP block, diagnostics, and configuration support

3-way isolated design separating power, communications, and inputs
CAN Communications (isolated)

Baud rate configuration for 1 Mbit, 500 Kbit, 250 Kbit, and 125 Kbit

RTCnet supported GAP update rates of 20 ms, 40 ms, 80 ms, 160 ms

LINKnet HT supported GAP update rates of 100 ms, 200 ms, etc (up to 1 second)
RTCnet, Real-Time, High Accuracy
LINKnet HT, Non Real-Time
(2 isolated CAN ports, fixed TB)
(1 isolated CAN port, pluggable)
28
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Block Diagram
Specifications
Environment
Operating Temperature
Storage Temperature
Vibration
Shock
Ingress Rating / Installation
EMC Emissions
EMC Immunity
–40 °C to +100 °C
–40 °C to +105 °C, recommend 20 °C to 40 °C for
long life
8.2 Grms, skid mount, per Woodward RV1
40 G, 3x each axis, per Woodward MS1
IP20, Pollution Degree 2, Overvoltage Category 3
EN 61000-6-4 (Heavy Industrial)
IACS UR E10 (Commercial Marine)
EN 61000-6-2 (Heavy Industrial)
IACS UR E10 (Commercial Marine)
Input Power
Input Power (watts)
Input Voltage (DC)
Input Voltage (AC ripple)
Input Isolation
Overvoltage Protection
Wire size (to node)
Wire size (main distribution)
Wiring & Source Impedance
Woodward
4.3 W max
(18 to 36) V (dc)
< 1.5 V (ac), 50 Hz to 1 kHz
500 V (ac) to chassis, CAN1, CAN2, and I/O
channels
±60 V (dc), includes reverse polarity protection
0.5 mm² / 20 AWG for two wires, 1.3 mm² / 16 AWG
max for single wires
< 300 m, 3 mm² / 12 AWG or larger
< 5.4 Ω, 300 μH max
29
RTCnet / LINKnet HT Nodes
Manual 26640
Functional
Number of channels
Input T/C Types
Engineering Units
Channel Isolation
Accuracy (–40, +100 °C)
Resolution
Hardware Filter
CMRR over temp
CMVR
Internal Temp Sensor
Miswire protection
Over-voltage protection
Cold Junction
8
K, J, T, B, E, N, R, S, and mV
(per NIST Monograph 175, ITS-90)
°C, °F, or ohms (default = °C)
0 V channel to channel
500 V (ac) to chassis, input power, CAN1, and CAN2
See tables below
< 0.1 °C (~15 bits)
2 poles @ ~10 ms
> 110 dB @ 50/60 Hz, 140 dB typical
±10 V (dc) to DGND, ±110 V (dc) to earth
±1.0 °C typical (available thru CANbus)
reverse polarity, short-circuit to earth / each other
±36 V (dc)
Automatic CJ compensation included
High Accuracy Thermocouple Module Accuracy
High Accuracy Signal Range
+200 °C to 900 °C
Accuracy (–20 °C, +80 °C)
±1.5 °C with CJ (types K, J, N, E, T)
Accuracy (–20 °C, +80 °C)
±3.0 °C with CJ (types R, S, B) and B type > 500 °C
CJ Sensors
Each channel has a dedicated CJ sensor
*Use Standard T/C specs when outside of High Accuracy Signal Range & Temperature
Standard Thermocouple Module Accuracy
Accuracy Signal Range
Accuracy (–40 °C, +100 °C)
CJ Sensor (ch 1–4)
CJ Sensor (ch 5–8)
–100 °C to upper curve limit
+500 °C to upper curve limit (type B)
±3.5 °C with CJ, mounted vertically-upright (±5.2 °C when inverted)
Channels 1–4 share a cold junction sensor (located at CJ3)
Channels 5–8 share a cold junction sensor (located at CJ7)
Thermocouple Curve Limits
Thermocouple Range Limits (mV, °C)
T/C Type
Type K
Type N
Type E
Type J
Type T
Type R
Type S
Type B
30
SpecLMV
–6.458
–4.345
–9.835
–8.095
–6.258
–0.226
–0.236
0.033
SpecUMV
54.886
47.513
76.373
69.553
20.872
21.101
18.693
13.82
SpecLDegC
–270
–270
–270
–210
–270
–50
–50
100
SpecUDegC
1372
1300
1000
1200
400
1768
1768
1820
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Configuration
Rotary switches are provided to configure the Network Address and Baud Rate
(125K, 250K, 500K, 1 Mbit). The Network Address (Node ID) is configurable
from 1-99 using the x10 and x1 rotary switches. For example, to configure node
29 address set x10=2 and x1=9.
Software Configuration: Woodward’s GAP application is a block language
programmer tool that provides specific blocks for each node type. GAP blocks
exist to configure and monitor the node channels, update rates, and faults.
Connector Pinouts
Input Power
Power is provided through a 3-position, latching terminal block with removable
plug.
Board Connection
PIN Color
Description
1
EARTH
Optional earth / shield connection
2
BLACK
Input Power (–)
3
RED
Input Power (+)
Plug Type: Side entry 3.5 mm, 8 A, pluggable with latching screw down
Max wire size: 1.3 mm² / 16 AWG for single wires, 0.5 mm² / 20 AWG for two wires
Figure 5-1. Input Power Connector Pinout
CAN Port(s)
Every RTCnet/LINKnet HT node provides a CAN1 communication port
(5-position, latching) for network communications. Removable mating plug(s) are
provided for field wiring.
RTCnet, real-time nodes provide an additional CAN2 connection for those
systems that require redundant network wiring. The redundant CPU’s in a
MicroNet Plus Control will control both ports properly during CPU failover events.
Board Connection
PIN Color
Description
1
BLACK CAN Signal Ground
2
BLUE
CAN Low
3
Shield
CAN Shield (30 Meg + AC coupled to EARTH)
4
WHITE CAN High
5
n/a
Not used, no internal connection
Plug Type: Side entry 3.5 mm, 8 A, pluggable with latching screw down
Max wire size: 1.3 mm² / 16 AWG for single wires, 0.5 mm² / 20 AWG for two wires
Figure 5-2. CAN Connector Pinout
CAN networks must include a 120 Ω termination resistor at each end of the trunk
line. It is recommended to design the network trunk to be less than 100 meters
with a max cumulative drop length of less than 39 meters. Drop cables
connecting a device to the trunk line should be as short as possible and much
less than 6 meters. For 1 Mbit/sec communication each drop cable must be less
than 1 meter.
Woodward
31
RTCnet / LINKnet HT Nodes
Manual 26640
Field Wiring and Diagrams
General Wiring Recommendations

T/C Inputs for standard nodes: Use (0.5 to 1.3) mm² / (16 to 20) AWG,
2-wire, shielded twisted pair cable (<300 m)

T/C Inputs for high accuracy nodes: Use (0.8 to 0.13) mm² / (18 to 26)
AWG, 2-wire, shielded twisted pair cable (<300 m). Use (1.3 to 0.13) mm² /
(16 to 26) AWG solid

Power: Use 0.5 mm² / 20 AWG, 2-wire cable. Limit daisy chains to 16 nodes

CAN: Use Belden YR58684, 0.3 mm² / 22 AWG, 3-wire comms cable
(2008-1512)

CAN Terminations: Use 120 Ω ± 10 Ω at each end of the network

CAN Stub Lengths: Short as possible (< 1 m is best)

Shielding: All CAN and I/O signals must be shielded for best performance

EARTH Connections: The DIN-rail clip is the primary earth connection. The
PE connection should be used when required for harsh environments where
the DIN-rail ground may be compromised over time.
Thermocouple Connections
32
Wiring Block Diagram
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Status Indicators and Trouble Codes
Each node displays a green CPU LED and a red FAULT LED to help in
troubleshooting if the module has a problem.
CPU (green): This indicates the CPU has power and is capable of running. It
also indicates that the firmware is correct for the board. For long term reliability
reasons, this LED is dimmer at high temperatures and turned OFF for high
temperature, out of spec conditions.
FAULT (red): A solid red LED indicates that the node has not been initialized by
the Network Master. A flashing red LED indicates a CAN communication fault or
hardware problem. A table of fault LED flash-codes is shown below:
TC Fault / Status The Node is not initialized or is in a pre‐operational state
CAN ‐ CORE_SYNC_ERR
CAN ‐ COMMUNICATION_CAN_ALL_ERR
CAN1 ‐ COMMUNICATION TX ERROR
CAN1 ‐ COMMUNICATION RX ERROR
CAN1 ‐ COMMUNICATION BUS OFF ERROR
CAN1 ‐ COMMUNICATION_WARNING_LIMIT_REACHED ERROR
CAN1 ‐ CORE_TIMESTAMP_VALUE_ERR
CAN ‐ COMMUNICATION_BAUD_RATE_ERR
CAN2 ‐ COMMUNICATION_NODE_ID_ERR
CAN2 ‐ COMMUNICATION TX ERROR
CAN2‐ COMMUNICATION RX ERROR
CAN2 ‐ COMMUNICATION BUS OFF ERROR
CAN 2‐ COMMUNICATION_WARNING_LIMIT_REACHED_ERROR
APP_CHANNEL0_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL1_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL2_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL3_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL4_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL5_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL6_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL7_SENSOR_LOW_LIMIT_ERR
APP_CHANNEL0_SENSOR_HIGH_LIMIT_ERR
APP_CHANNEL1_SENSOR_HIGH_LIMIT_ERR
APP_CHANNEL2_SENSOR_HIGH_LIMIT_ERR
APP_CHANNEL3_SENSOR_HIGH_LIMIT_ERR
APP_CHANNEL4_SENSOR_HIGH_LIMIT_ERR
APP_CHANNEL5_SENSOR_HIGH_LIMIT_ERR
APP_CHANNEL6_SENSOR_HIGH_LIMIT_ERR
APP_CHANNEL7_SENSOR_HIGH_LIMIT_ERR
Woodward
FlashCode
Solid Red
1,1
1,2
1,3
1,4
1,5
1,6
1,7
2,1
2,2
2,3
2,4
2,5
2,6
4,01
4,02
4,03
4,04
4,05
4,06
4,07
4,08
4,09
4,10
4,11
4,12
4,13
4,14
4,15
4,16
33
RTCnet / LINKnet HT Nodes
CORE_EEPROM_WRITE_ERR CORE_EEPROM_READ_ERR CORE_PARAMETER_ERR CORE_PARAMETER_VERSION_ERR CORE_STACK_OVERFLOW_WARNING_ERR
CORE_SENSE_5V_RANGE_ERR CORE_SENSE_12V_RANGE_ERR CORE_SENSE_m12V_RANGE_ERR CORE_SENSE_5VA_RANGE_ERR CORE_SENSE_3p3V_RANGE_ERR CORE_SENSE_1p8V_RANGE_ERR CORE_INTERNAL_ADC_ERR CORE_LOW_VOLTAGE_RESET_ERR APP_EXTERNAL_ADC_ERR 34
Manual 26640
8,01
8,02
8,03
8,04
8,05
8,06
8,07
8,08
8,09
8,10
8,11
9,1
9,2
9,9
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Chapter 6.
AIO 4–20 mA Nodes (8in, 2out)
Description and Features
The AIO and AIO LOOP powered nodes are CANopen based distributed I/O
modules that interface to either a Woodward RTCnet or LINKnet HT network.
RTCnet products are designed for synchronous real-time/deterministic operation
whereas LINKnet HT products are designed for slower asynchronous networks.
These modules provide (8) 4–20 mA input channels of I/O monitoring and (2)
4–20 mA output channels for I/O control. The input and output channel groups are
isolated from each other. An isolated Loop Power supply for the analog inputs is
provided as +22 V (dc) and includes short-circuit/over-voltage protection.
The AIO node provides self-powered input channels, and the AIO LOOP node
provides loop powered input channels.
Features

(8) 4–20 mA Analog Input Channels, 14 bit resolution

(2) 4–20 mA Analog Output Channels, 12 bit resolution

Loop Power +22 V is provided with short-circuit and over-voltage protection

AI channel 6 is designed as a fast channel for special control functions

AI channels 7/8 are self-power inputs that can be configured for loop power

High temperature/reliability design for 100 °C environments

High vibration design suitable for industrial turbine/engine skid-mounting

Designed for operation with MicroNet Plus and redundant CPU failover

Woodward GAP block, diagnostics, and configuration support

4-way isolated design separating power, communications, inputs, and
outputs
CAN Communications (isolated)

Baud rate configuration for 1 Mbit, 500 Kbit, 250 Kbit, and 125 Kbit

RTCnet supported GAP update rates of 10 ms, 20 ms, 40 ms, 80 ms, 160 ms

LINKnet HT supported GAP update rates of 100 ms, 200 ms, etc (up to 1 second)
Woodward
RTCnet, Real-Time
LINKnet-HT, Non Real-Time
(2 isolated CAN ports)
(1 isolated CAN port)
35
RTCnet / LINKnet HT Nodes
Manual 26640
Block Diagram
Specifications
Environment
Operating Temperature
Storage Temperature
Vibration
Shock
Ingress Rating / Installation
EMC Emissions
EMC Immunity
–40 °C to +100 °C
–40 °C to +105 °C, recommend 20 °C to 40 °C for
long life
8.2 Grms, skid mount, per Woodward RV1
40 G, 3x each axis, per Woodward MS1
IP20, Pollution Degree 2, Overvoltage Category 3
EN 61000-6-4 (Heavy Industrial)
IACS UR E10 (Commercial Marine)
EN 61000-6-2 (Heavy Industrial)
IACS UR E10 (Commercial Marine)
Input Power
Input Power (watts)
Input Voltage (DC)
Input Voltage (AC ripple)
Input Isolation
Overvoltage Protection
Wire size (to node)
Wire size (main distribution)
Wiring & Source Impedance
36
5.6 W max (no loop power)
12.1 W max (with loop power=250 mA)
(18 to 36) V (dc)
< 1.5 V (ac), 50 Hz to 1 kHz
500 V (ac) to chassis, CAN1, CAN2, and I/O
channels
±60 V (dc), includes reverse polarity protection
0.5 mm² / 20 AWG for two wires, 1.3 mm² / 16 AWG
max for single wires
< 300 m, 3 mm² / 12 AWG or larger
< 5.4 Ω, 300 μH max
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Specifications (AI)
Number of channels
AI Input Range
AI Input Impedance
AI Loop power output
AI Loop power Isolation
8
(0 to 24) mA
0 V channel to channel.
500 V (ac) to PS Input, CAN1, CAN2, AO circuits, EARTH
≤ 0.03 mA or 50 mV in voltage mode
≤ 0.12 mA or 100 mV in voltage mode
≤ 0.0325 mA
14 bits of full scale (FS=24 mA)
2 poles @ ~10 ms
**Fast channel (ch 6) has 2 poles @ ~5 ms
~160 
22 V ±12 %, (0 to 250) mA, short circuit & diode protected
500 V (ac) to PS Input, CAN1, CAN2, AO circuits, EARTH
AI CMRR over temp
AI CMVR
AI Overvoltage
Internal Temp Sensor
Miswire protection (AI)
Miswire protection (LPWR)
> 70 dB @ 50/60 Hz (typical 86 db)
50 V (dc) (amplifier capable to 200 V [dc])
±36 V (dc) continuous at room temperature
±1.0 °C typical (available thru CANbus)
reverse polarity, short-circuit to earth / each other
reverse polarity, short-circuit to earth / each other
AI Input Isolation
AI Accuracy (@ 25 °C)
AI Accuracy (–40, +100 °C)
AI High Accuracy (–20, +80 °C)
AI Resolution
AI Hardware filter
Specifications (AO)
Number of channels
AO Output Range
AO Output Isolation
AO Accuracy (@ 25 °C)
AO Accuracy (–40, +100 °C)
AO High Accuracy (–20, +80 °C)
AO Resolution
AO Load Capability
AO Hardware filter (max)
AO Output Readback
AO Readback Accuracy
AO Readback HW Filter
IOLOCK state
Miswire protection
Over-voltage protection
2 (each with readback)
(2 to 24) mA, 0 mA during shutdown
0 V channel to channel
500 V (ac) to PS Input, CAN1, CAN2, AI circuits, EARTH
≤ 0.05 mA
≤ 0.12 mA
≤ 0.05 mA
12 bits of full scale (FS=24 mA)
400  at 20 mA
3 poles @ 160 μs
(0 to 24) mA
< 5 % over full temperature range
1.1 ms nominal
DOUT circuits are de-energized during power-up, powerdown, voltage failures (5 V), and watchdog failures
reverse polarity, short-circuit to earth / each other
Overvoltage to 36 V (dc)
Configuration
Rotary switches are provided to configure the Network Address and Baud Rate
(125K, 250K, 500K, 1 Mbit).
The Network Address (Node ID) is configurable from 1-99 using the x10 and x1
rotary switches. For example, to configure node 29 address set x10=2 and x1=9.
Software Configuration: Woodward’s GAP application is a block language
programmer tool that provides specific blocks for each node type. GAP blocks
exist to configure and monitor the node channels, update rates, and faults.
Woodward
37
RTCnet / LINKnet HT Nodes
Manual 26640
Connector Pinouts
Input Power
Power is provided through a 3 position, latching terminal block with removable
plug.
Board Connection
PIN Color
Description
1
EARTH
Optional earth / shield connection
2
BLACK
Input Power (–)
3
RED
Input Power (+)
Plug Type: Side entry 3.5 mm, 8 A, pluggable with latching screw down
Max wire size: 1.3 mm² / 16 AWG for single wires, 0.5 mm² / 20 AWG for two wires
Figure 6-1. Input Power Connector Pinout
CAN Port(s)
Every RTCnet/LINKnet HT node provides a CAN1 communication port (5
position, latching) for network communications. Removable mating plug(s) are
provided for field wiring.
RTCnet, real-time nodes provide an additional CAN2 connection for those
systems that require redundant network wiring. The redundant CPU’s in a
MicroNet Plus Control will control both ports properly during CPU failover events.
Board Connection
PIN Color
Description
1
BLACK CAN Signal Ground
2
BLUE
CAN Low
3
Shield
CAN Shield (30 Meg + AC coupled to EARTH)
4
WHITE CAN High
5
n/a
Not used, no internal connection
Plug Type: Side entry 3.5 mm, 8 A, pluggable with latching screw down
Max wire size: 1.3 mm² / 16 AWG for single wires, 0.5 mm² / 20 AWG for two wires
Figure 6-2. CAN Connector Pinout
CAN networks must include a 120 Ω termination resistor at each end of the trunk
line. It is recommended to design the network trunk to be less than 100 meters
with a max cumulative drop length of less than 39 meters. Drop cables
connecting a device to the trunk line should be as short as possible and much
less than 6 meters. For 1 Mbit/sec communication each drop cable must be less
than 1 meter.
38
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Field Wiring and Diagrams
General Wiring Recommendations

Inputs/Outputs: Use 0.5 mm² / 20 AWG, 2-wire, shielded twisted pair cable
(<300 m)

Power: Use 0.5 mm² / 20 AWG, 2-wire cable. Limit daisy chains to 16 nodes

CAN: Use Belden YR58684, 0.3 mm² / 22 AWG, 3-wire comms cable
(2008-1512)

CAN Terminations: Use 120 Ω ± 10 Ω at each end of the network

CAN Stub Lengths: Short as possible (< 1 m is best)

Shielding: All CAN and I/O signals must be shielded for best performance

EARTH Connections: The DIN-rail clip is the primary earth connection. The
PE connection should be used when required for harsh environments where
the DIN-rail ground may be compromised over time.
AIO LOOP Connections
Wiring Block Diagrams
AI Loop Powered (ch1-6)
OUT
4-20mA
XDCR
PWR
7
+
OVP
8
9
HW Input
Filter
AMP
SCP
LOOP
POWER +22V
SHLD
TO
CPU
Channels 7 and 8 are self-powered, but can be
configured for loop-power with an external jumper.
AI Loop Powered (ch7 or ch8)
OUT
4-20mA
XDCR
PWR
26 +
HW Input
Filter
27
28
Woodward
OVP
SHLD
LOOP
POWER +22V
29
SCP
33
LOOP GND
39
AMP
TO
CPU
RTCnet / LINKnet HT Nodes
AIO Connections
Manual 26640
Wiring Block Diagrams
Channels 7 and 8 are self-powered, but can be
configured for loop-power with an external jumper.
Status Indicators and Trouble Codes
Each node displays a green CPU LED and a red FAULT LED to help in
troubleshooting if the module has a problem.
CPU (green): This indicates the CPU has power and is capable of running. It
also indicates that the firmware is correct for the board. For long term reliability
reasons, this LED is dimmer at high temperatures and turned OFF for high
temperature, out of spec conditions.
FAULT (red): A solid red LED indicates that the node has not been initialized by
the Network Master. A flashing red LED indicates a CAN communication fault or
hardware problem. A table of fault LED flash-codes is shown below:
40
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
AIO Fault / Status The Node is not initialized or is in a pre‐operational state
CAN ‐ CORE_SYNC_ERR
CAN ‐ COMMUNICATION_CAN_ALL_ERR
CAN1 ‐ COMMUNICATION TX ERROR
CAN1 ‐ COMMUNICATION RX ERROR
CAN1 ‐ COMMUNICATION BUS OFF ERROR
CAN1 ‐ COMMUNICATION_WARNING_LIMIT_REACHED ERROR
CAN ‐ CORE_TIMESTAMP_VALUE_ERR
CAN ‐ COMMUNICATION_BAUD_RATE_ERR
CAN ‐ COMMUNICATION_NODE_ID_ERR
CAN2 ‐ COMMUNICATION TX ERROR
CAN2 ‐ COMMUNICATION RX ERROR
CAN2 ‐ COMMUNICATION BUS OFF ERROR
CAN2 ‐ COMMUNICATION_WARNING_LIMIT_REACHED_ERROR
CAN1 ‐ COMMUNICATION_RPDO4_SLIP_ERROR
CAN2 ‐ COMMUNICATION_RPDO4_SLIP_ERROR
APP_CHANNEL0_HW_LOW_LIMIT_ERR
APP_CHANNEL1_HW_LOW_LIMIT_ERR
APP_CHANNEL2_HW_LOW_LIMIT_ERR
APP_CHANNEL3_HW_LOW_LIMIT_ERR
APP_CHANNEL4_HW_LOW_LIMIT_ERR
APP_CHANNEL5_HW_LOW_LIMIT_ERR
APP_CHANNEL6_HW_LOW_LIMIT_ERR
APP_CHANNEL7_HW_LOW_LIMIT_ERR
CORE_MAIN3_RATE_GROUP_DATA_WATCHDOG_ERR
CORE_EEPROM_WRITE_ERR
CORE_EEPROM_READ_ERR
CORE_PARAMETER_ERR
CORE_PARAMETER_VERSION_ERR
CORE_STACK_OVERFLOW_WARNING_ERR
CORE_SENSE_5V_RANGE_ERR
CORE_SENSE_15V_RANGE_ERR
CORE_SENSE_m15V_RANGE_ERR
CORE_SENSE_LOOP22V_RANGE_ERR
CORE_INTERNAL_ADC_ERR
CORE_LOW_VOLTAGE_RESET_ERR
Woodward
FlashCode
Solid Red
1,1
1,2
1,3
1,4
1,5
1,6
1,7
2,1
2,2
2,3
2,4
2,5
2,6
3,07
3,08
4,1
4,2
4,3
4,4
4,5
4,6
4,7
4,8
5,3
8,01
8,02
8,03
8,04
8,05
8,06
8,12
8,13
8,15
9,1
9,2
41
RTCnet / LINKnet HT Nodes
Manual 26640
Chapter 7.
Discrete Input Nodes (16ch)
Description and Features
The Discrete Input (DI) node is a CANopen based distributed I/O module that
interfaces to either a Woodward RTCnet or LINKnet HT network. RTCnet
products are designed for synchronous real-time, deterministic operation
whereas LINKnet HT products are designed for slower asynchronous networks.
This module provides (16) discrete input channels for +24 V (dc) signals. An
isolated Contact Power for the inputs is provided as +24 V (dc) and includes
short-circuit/over-voltage protection.
Features

(16) Discrete Input Channels for +24 V (dc) signals

Contact Power +24 V is provided with short-circuit and over-voltage
protection

High temperature/reliability design for 100 °C environments

High vibration design suitable for industrial turbine/engine skid-mounting

Designed for operation with MicroNet Plus and redundant CPU failover

Woodward GAP block, diagnostics, and configuration support

3-way isolated design separating power, communications, and inputs
CAN Communications (isolated)

Baud rate configuration for 1 Mbit, 500 Kbit, 250 Kbit, and 125 Kbit

RTCnet supported GAP update rates of 10 ms, 20 ms, 40 ms, 80 ms, 160 ms

LINKnet HT supported GAP update rates of 100 ms, 200 ms, etc (up to 1 second)
42
RTCnet, Real-Time
LINKnet-HT, Non Real-Time
(2 isolated CAN ports)
(1 isolated CAN port)
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Block Diagram
Specifications
Environment
Operating Temperature
Storage Temperature
Vibration
Shock
Ingress Rating / Installation
EMC Emissions
EMC Immunity
–40 C to +100 C
–40 C to +105 C, recommend 20 °C to 40 °C for long life
8.2 Grms, skid mount, per Woodward RV1
40 G, 3x each axis, per Woodward MS1
IP20, Pollution Degree 2, Overvoltage Category 3
EN 61000-6-4 (Heavy Industrial)
IACS UR E10 (Commercial Marine)
EN 61000-6-2 (Heavy Industrial)
IACS UR E10 (Commercial Marine)
Input Power
Input Power (watts)
Input Voltage (DC)
Input Voltage (AC ripple)
Input Isolation
Overvoltage Protection
Wire size (to node)
Wire size (main distribution)
Wiring & Source Impedance
5.8 W max
(18 to 36) V (dc)
< 1.5 V (ac), 50 Hz to 1 kHz
500 V (ac) to chassis, CAN1, CAN2, and I/O channels
±60 V (dc), includes reverse polarity protection
0.5 mm² / 20 AWG for two wires,
1.3 mm² / 16 AWG max for single wires
< 300 m, 3 mm² / 12 AWG or larger
< 5.4 Ω, 300 μH max
Functional
Number of Channels
DI Channel Input Voltage
DI Channel Input Current, R
DI Channel Hardware Filter
DI Channel Isolation
DI Channel Firmware Filter
Contact Power Output
Contact Power Isolation
Internal Temp Sensor
Miswire protection (DI)
Miswire protection (CPWR)
Over-voltage Protection
Woodward
16
(18 to 36) V (dc)
(5 ± 2) mA (input resistance of 50K)
1.0 ms (0.75–1.4 ms), single pole, room temp
0 V channel to channel
500 V (ac) to PS Input, CAN1, CAN2, and EARTH
noise filter of 150 μs (3 samples @ 50 μs/each)
24 V ±14 %, (0 to 200) mA, short circuit & diode protected
500 V (ac) to PS Input, CAN1, CAN2, and EARTH
±1.0 °C typical (value available thru CANbus)
short-circuit to earth / each other
reverse polarity, short-circuit to earth / each other
Overvoltage to 36 V (dc), reverse polarity, short-circuit
43
RTCnet / LINKnet HT Nodes
Manual 26640
Configuration
Rotary switches are provided to configure the Network Address and Baud Rate
(125K, 250K, 500K, 1 Mbit). The Network Address (Node ID) is configurable
from 1-99 using the x10 and x1 rotary switches. For example, to configure node
29 address set x10=2 and x1=9.
Software Configuration: Woodward’s GAP application is a block language
programmer tool that provides specific blocks for each node type. GAP blocks
exist to configure and monitor the node channels, update rates, and faults.
Connector Pinouts
Input Power
Power is provided through a 3 position, latching terminal block with removable
plug.
Board Connection
PIN Color
Description
1
EARTH
Optional earth / shield connection
2
BLACK
Input Power (–)
3
RED
Input Power (+)
Plug Type: Side entry 3.5 mm, 8 A, pluggable with latching screw down
Max wire size: 1.3 mm² / 16 AWG for single wires, 0.5 mm² / 20 AWG for two wires
Figure 7-1. Input Power Connector Pinout
CAN Port(s)
Every RTCnet/LINKnet HT node provides a CAN1 communication port (5
position, latching) for network communications. Removable mating plug(s) are
provided for field wiring.
RTCnet, real-time nodes provide an additional CAN2 connection for those
systems that require redundant network wiring. The redundant CPU’s in a
MicroNet Plus Control will control both ports properly during CPU failover events.
Board Connection
PIN Color
Description
1
BLACK CAN Signal Ground
2
BLUE
CAN Low
3
Shield
CAN Shield (30 Meg + AC coupled to EARTH)
4
WHITE CAN High
5
n/a
Not used, no internal connection
Plug Type: Side entry 3.5 mm, 8 A, pluggable with latching screw down
Max wire size: 1.3 mm² / 16 AWG for single wires, 0.5 mm² / 20 AWG for two wires
Figure 7-2. CAN Connector Pinout
CAN networks must include a 120 Ω termination resistor at each end of the trunk
line. It is recommended to design the network trunk to be less than 100 meters
with a max cumulative drop length of less than 39 meters. Drop cables
connecting a device to the trunk line should be as short as possible and much
less than 6 meters. For 1 Mbit/s communication each drop cable must be less
than 1 meter.
44
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Field Wiring and Diagrams
General Wiring Recommendations

Inputs: Use (0.3 to 1.3) mm² / (16 to 22) AWG, single or multi-conductor
cable (<30 m), shielded is best

Power: Use 0.5 mm² / 20 AWG, 2-wire cable. Limit daisy chains to 16 nodes

CAN: Use Belden YR58684, 0.3 mm² / 22 AWG, 3-wire comms cable
(2008-1512)

CAN Terminations: Use 120 Ω ± 10 Ω at each end of the network

CAN Stub Lengths: Short as possible (< 1 m is best)

Shielding: All CAN signals must be shielded for best performance

EARTH Connections: The DIN-rail clip is the primary earth connection. The
PE connection should be used when required for harsh environments where
the DIN-rail ground may be compromised over time.
Woodward
45
RTCnet / LINKnet HT Nodes
Manual 26640
Status Indicators and Trouble Codes
Each node displays a green CPU LED and a red FAULT LED to help in
troubleshooting if the module has a problem.
CPU (green): This indicates the CPU has power and is capable of running. It
also indicates that the firmware is correct for the board. For long term reliability
reasons, this LED is dimmer at high temperatures and turned OFF for high
temperature, out of spec conditions.
FAULT (red): A solid red LED indicates that the node has not been initialized by
the Network Master. A flashing red LED indicates a CAN communication fault or
hardware problem. A table of fault LED flash-codes is shown below:
DIN Fault / Status The Node is not initialized or is in a pre‐operational state
CAN ‐ CORE_SYNC_ERR CAN ‐ COMMUNICATION_CAN_ALL_ERR
CAN1 ‐ COMMUNICATION TX ERROR CAN1 ‐ COMMUNICATION RX ERROR CAN1 ‐ COMMUNICATION BUS OFF ERROR
CAN1 ‐ COMMUNICATION_WARNING_LIMIT_REACHED ERROR
CAN ‐ CORE_TIMESTAMP_VALUE_ERR
CAN ‐ COMMUNICATION_BAUD_RATE_ERR
CAN ‐ COMMUNICATION_NODE_ID_ERR
CAN2 ‐ COMMUNICATION TX ERROR CAN2 ‐ COMMUNICATION RX ERROR CAN2 ‐ COMMUNICATION BUS OFF ERROR
CAN2 ‐ COMMUNICATION_WARNING_LIMIT_REACHED_ERROR
CORE_EEPROM_WRITE_ERR CORE_EEPROM_READ_ERR CORE_PARAMETER_ERR CORE_PARAMETER_VERSION_ERR CORE_STACK_OVERFLOW_WARNING_ERR
CORE_SENCE_5V_RANGE_ERR CORE_SENSE_CPWR24V_RANGE_ERR
CORE_INTERNAL_ADC_ERR CORE_LOW_VOLTAGE_RESET_ERR 46
FlashCode Solid Red 1,1
1,2
1,3
1,4
1,5
1,6
1,7
2,1
2,2
2,3
2,4
2,5
2,6
8,01
8,02
8,03
8,04
8,05
8,06
8,14
9,1
9,2
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Chapter 8.
Discrete Out Relay Driver Nodes (16ch)
Description and Features
The Discrete Output Relay Driver (DO) node is a CANopen based distributed I/O
module that interfaces to either a Woodward RTCnet or LINKnet HT network.
RTCnet products are designed for synchronous real-time, deterministic operation
whereas LINKnet HT products are designed for slower asynchronous networks.
This module provides (16) discrete output low-side driver channels that are
capable of sinking up to 250 mA when used to drive external relays. Each output
channel includes a readback fault that monitors the coil / load voltage.
Features

(16) Discrete Output Channels with readback fault

High temperature/reliability design for 100 °C environments

High vibration design suitable for industrial turbine/engine skid-mounting

Designed for operation with MicroNet Plus and redundant CPU failover

Woodward GAP block, diagnostics, and configuration support

3-way isolated design separating power, communications, and outputs
CAN Communications (isolated)

Baud rate configuration for 1 Mbit, 500 Kbit, 250 Kbit, and 125 Kbit

RTCnet supported GAP update rates of 10 ms, 20 ms, 40 ms, 80 ms, 160 ms

LINKnet HT supported GAP update rates of 100 ms, 200 ms, etc (up to 1 second)
Woodward
RTCnet, Real-Time
LINKnet-HT, Non Real-Time
(2 isolated CAN ports)
(1 isolated CAN port)
47
RTCnet / LINKnet HT Nodes
Manual 26640
Block Diagram
Specifications
Environment
Operating Temperature
Storage Temperature
Vibration
Shock
Ingress Rating / Installation
EMC Emissions
EMC Immunity
–40 °C to +100 °C
–40 °C to +105 °C, recommend 20 °C to 40 °C for long life
8.2 Grms, skid mount, per Woodward RV1
40 G, 3x each axis, per Woodward MS1
IP20, Pollution Degree 2, Overvoltage Category 3
EN 61000-6-4 (Heavy Industrial)
IACS UR E10 (Commercial Marine)
EN 61000-6-2 (Heavy Industrial)
IACS UR E10 (Commercial Marine)
Input Power
Input Power (watts)
Input Voltage (DC)
Input Voltage (AC ripple)
Input Isolation
Overvoltage Protection
Wire size (to node)
Wire size (main distribution)
Wiring & Source Impedance
4.2 W max
(18 to 36) V (dc)
< 1.5 V (ac), 50 Hz to 1 kHz
500 V (ac) to chassis, CAN1, CAN2, and I/O channels
±60 V (dc), includes reverse polarity protection
0.5 mm² / 20 AWG for two wires,
1.3 mm² / 16 AWG max for single wires
< 300 m, 3 mm² / 12 AWG or larger
< 5.4 Ω, 300 μH max
Functional
Number of channels
DOUT Load Voltage
DOUT Load Current
DOUT Readback
DOUT Leakage (OFF)
DOUT Channel Isolation
IOLOCK State
RDBK Filter (hw/sw)
Internal Temp Sensor
Miswire Protection
Over-voltage Protection
Over-current Protection
Over-temperature
48
16, low-side driver type
(5 to 36) V (dc), customer supplied
250 mA max per channel
High/Low coil voltage status available
< 650 μA
0 V channel to channel (except what external relay provides)
500 V (ac) to PS Input, CAN1, CAN2, and EARTH
DOUT circuits are de-energized during power-up, power-down,
voltage failures (5 V, 12 V), and watchdog failures
~1 ms, single pole with 150 μs digital noise filter
±1.0 °C typical (value available thru CANbus)
reverse polarity, short-circuit to earth / each other
Overvoltage to 36 V (dc), reverse polarity, short-circuit
FET over-current protection at 10 A
FET protection and shutdown at Tj=150 °C
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Configuration
Rotary switches are provided to configure the Network Address and Baud Rate
(125K, 250K, 500K, 1 Mbit). The Network Address (Node ID) is configurable
from 1-99 using the x10 and x1 rotary switches. For example, to configure node
29 address set x10=2 and x1=9.
Software Configuration: Woodward’s GAP application is a block language
programmer tool that provides specific blocks for each node type. GAP blocks
exist to configure and monitor the node channels, update rates, and faults.
Connector Pinouts
Input Power
Power is provided through a 3 position, latching terminal block with removable
plug.
Board Connection
PIN Color
Description
1
EARTH
Optional earth / shield connection
2
BLACK
Input Power (–)
3
RED
Input Power (+)
Plug Type: Side entry 3.5 mm, 8 A, pluggable with latching screw down
Max wire size: 1.3 mm² / 16 AWG for single wires, 0.5 mm² / 20 AWG for two wires
Figure 8-1. Input Power Connector Pinout
CAN Port(s)
Every RTCnet/LINKnet HT node provides a CAN1 communication port (5
position, latching) for network communications. Removable mating plug(s) are
provided for field wiring.
RTCnet, real-time nodes provide an additional CAN2 connection for those
systems that require redundant network wiring. The redundant CPU’s in a
MicroNet Plus Control will control both ports properly during CPU failover events.
Board Connection
PIN Color
Description
1
BLACK CAN Signal Ground
2
BLUE
CAN Low
3
Shield
CAN Shield (30 Meg + AC coupled to EARTH)
4
WHITE CAN High
5
n/a
Not used, no internal connection
Plug Type: Side entry 3.5 mm, 8 A, pluggable with latching screw down
Max wire size: 1.3 mm² / 16 AWG for single wires, 0.5 mm² / 20 AWG for two wires
Figure 8-2. CAN Connector Pinout
CAN networks must include a 120 Ω termination resistor at each end of the trunk
line. It is recommended to design the network trunk to be less than 100 meters with
a max cumulative drop length of less than 39 meters. Drop cables connecting a
device to the trunk line should be as short as possible and much less than 6
meters. For 1 Mbit/sec communication each drop cable must be less than 1 meter.
Woodward
49
RTCnet / LINKnet HT Nodes
Manual 26640
Field Wiring and Diagrams
General Wiring Recommendations

Inputs: Use (0.3 to 1.3) mm² / (16 to 22) AWG, single or multi-conductor
cable (<30 m), shielded is best

Power: Use 0.5 mm² / 20 AWG, 2-wire cable. Limite daisy chains to 16
nodes

CAN: Use Belden YR58684, 0.3 mm² / 22 AWG, 3-wire comms cable
(2008-1512)

CAN Terminations: Use 120 Ω ± 10 Ω at each end of the network

CAN Stub Lengths: Short as possible (< 1 m is best)

Shielding: All CAN signals must be shielded for best performance

EARTH Connections: The DIN-rail clip is the primary earth connection. The
PE connection should be used when required for harsh environments where
the DIN-rail ground may be compromised over time.
DOUT Connections
Wiring Block Diagram
Relay Power
5-36VDC
DOUT Relay Driver
C
P
U
IOLOCK
50
BUF
BUF
RDBK
Driver
1
2
Relay Power
Common
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Status Indicators and Trouble Codes
Each node displays a green CPU LED and a red FAULT LED to help in
troubleshooting if the module has a problem.
CPU (green): This indicates the CPU has power and is capable of running. It
also indicates that the firmware is correct for the board. For long term reliability
reasons, this LED is dimmer at high temperatures and turned OFF for high
temperature, out of spec conditions.
FAULT (red): A solid red LED indicates that the node has not been initialized by
the Network Master. A flashing red LED indicates a CAN communication fault or
hardware problem. A table of fault LED flash-codes is shown below:
DOUT Fault / Status The Node is not initialized or is in a pre‐operational state
CAN ‐ CORE_SYNC_ERR
CAN ‐ COMMUNICATION_CAN_ALL_ERR
CAN1 ‐ COMMUNICATION TX ERROR
CAN1 ‐ COMMUNICATION RX ERROR
CAN1 ‐ COMMUNICATION BUS OFF ERROR
CAN1 ‐ COMMUNICATION_WARNING_LIMIT_REACHED ERROR
CAN ‐ CORE_TIMESTAMP_VALUE_ERR
CAN ‐ COMMUNICATION_BAUD_RATE_ERR
CAN ‐ COMMUNICATION_NODE_ID_ERR
CAN2 ‐ COMMUNICATION TX ERROR
CAN2 ‐ COMMUNICATION RX ERROR
CAN2 ‐ COMMUNICATION BUS OFF ERROR
CAN2 ‐ COMMUNICATION_WARNING_LIMIT_REACHED_ERROR
CAN1 ‐ COMMUNICATION_RPDO1_SLIP ERROR
CAN2 ‐ COMMUNICATION_RPDO1_SLIP ERROR
CORE_MAIN1_RATE_GROUP_DATA_WATCHDOG_ERR
CORE_EEPROM_WRITE_ERR
CORE_EEPROM_READ_ERR
CORE_PARAMETER_ERR
CORE_PARAMETER_VERSION_ERR
CORE_STACK_OVERFLOW_WARNING_ERR
CORE_SENSE_5V_RANGE_ERR
CORE_SENSE_12V_RANGE_ERR
CORE_IOLOCK_ERR CORE_INTERNAL_ADC_ERR
CORE_LOW_VOLTAGE_RESET_ERR
Woodward
FlashCode
Solid Red
1,1
1,2
1,3
1,4
1,5
1,6
1,7
2,1
2,2
2,3
2,4
2,5
2,6
3,01
3,02
5,1
8,01
8,02
8,03
8,04
8,05
8,06
8,07
8,16
9,1
9,2
51
RTCnet / LINKnet HT Nodes
Manual 26640
Chapter 9.
Service Options
Product Service Options
If you are experiencing problems with the installation, or unsatisfactory
performance of a Woodward product, the following options are available:

Consult the troubleshooting guide in the manual.

Contact the manufacturer or packager of your system.

Contact the Woodward Full Service Distributor serving your area.

Contact Woodward technical assistance (see “How to Contact Woodward”
later in this chapter) and discuss your problem. In many cases, your
problem can be resolved over the phone. If not, you can select which course
of action to pursue based on the available services listed in this chapter.
OEM and Packager Support: Many Woodward controls and control devices are
installed into the equipment system and programmed by an Original Equipment
Manufacturer (OEM) or Equipment Packager at their factory. In some cases, the
programming is password-protected by the OEM or packager, and they are the best
source for product service and support. Warranty service for Woodward products
shipped with an equipment system should also be handled through the OEM or
Packager. Please review your equipment system documentation for details.
Woodward Business Partner Support: Woodward works with and supports a
global network of independent business partners whose mission is to serve the
users of Woodward controls, as described here:

A Full Service Distributor has the primary responsibility for sales, service,
system integration solutions, technical desk support, and aftermarket
marketing of standard Woodward products within a specific geographic area
and market segment.

An Authorized Independent Service Facility (AISF) provides authorized
service that includes repairs, repair parts, and warranty service on Woodward's
behalf. Service (not new unit sales) is an AISF's primary mission.

A Recognized Engine Retrofitter (RER) is an independent company that
does retrofits and upgrades on reciprocating gas engines and dual-fuel
conversions, and can provide the full line of Woodward systems and
components for the retrofits and overhauls, emission compliance upgrades,
long term service contracts, emergency repairs, etc.

A Recognized Turbine Retrofitter (RTR) is an independent company that
does both steam and gas turbine control retrofits and upgrades globally, and
can provide the full line of Woodward systems and components for the
retrofits and overhauls, long term service contracts, emergency repairs, etc.
You can locate your nearest Woodward distributor, AISF, RER, or RTR on our
website at:
www.woodward.com/directory
52
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
Woodward Factory Servicing Options
The following factory options for servicing Woodward products are available
through your local Full-Service Distributor or the OEM or Packager of the
equipment system, based on the standard Woodward Product and Service
Warranty (5-01-1205) that is in effect at the time the product is originally shipped
from Woodward or a service is performed:

Replacement/Exchange (24-hour service)

Flat Rate Repair

Flat Rate Remanufacture
Replacement/Exchange: Replacement/Exchange is a premium program
designed for the user who is in need of immediate service. It allows you to
request and receive a like-new replacement unit in minimum time (usually within
24 hours of the request), providing a suitable unit is available at the time of the
request, thereby minimizing costly downtime. This is a flat-rate program and
includes the full standard Woodward product warranty (Woodward Product and
Service Warranty 5-01-1205).
This option allows you to call your Full-Service Distributor in the event of an
unexpected outage, or in advance of a scheduled outage, to request a
replacement control unit. If the unit is available at the time of the call, it can
usually be shipped out within 24 hours. You replace your field control unit with
the like-new replacement and return the field unit to the Full-Service Distributor.
Charges for the Replacement/Exchange service are based on a flat rate plus
shipping expenses. You are invoiced the flat rate replacement/exchange charge
plus a core charge at the time the replacement unit is shipped. If the core (field
unit) is returned within 60 days, a credit for the core charge will be issued.
Flat Rate Repair: Flat Rate Repair is available for the majority of standard
products in the field. This program offers you repair service for your products with
the advantage of knowing in advance what the cost will be. All repair work carries
the standard Woodward service warranty (Woodward Product and Service
Warranty 5-01-1205) on replaced parts and labor.
Flat Rate Remanufacture: Flat Rate Remanufacture is very similar to the Flat
Rate Repair option with the exception that the unit will be returned to you in “likenew” condition and carry with it the full standard Woodward product warranty
(Woodward Product and Service Warranty 5-01-1205). This option is applicable
to mechanical products only.
Returning Equipment for Repair
If a control (or any part of an electronic control) is to be returned for repair,
please contact your Full-Service Distributor in advance to obtain Return
Authorization and shipping instructions.
When shipping the item(s), attach a tag with the following information:

return authorization number;

name and location where the control is installed;

name and phone number of contact person;

complete Woodward part number(s) and serial number(s);

description of the problem;

instructions describing the desired type of repair.
Woodward
53
RTCnet / LINKnet HT Nodes
Manual 26640
Packing a Control
Use the following materials when returning a complete control:

protective caps on any connectors;

antistatic protective bags on all electronic modules;

packing materials that will not damage the surface of the unit;

at least 100 mm (4 inches) of tightly packed, industry-approved packing
material;

a packing carton with double walls;

a strong tape around the outside of the carton for increased strength.
To prevent damage to electronic components caused by improper
handling, read and observe the precautions in Woodward manual
82715, Guide for Handling and Protection of Electronic Controls,
Printed Circuit Boards, and Modules.
Replacement Parts
When ordering replacement parts for controls, include the following information:

the part number(s) (XXXX-XXXX) that is on the enclosure nameplate;

the unit serial number, which is also on the nameplate.
Engineering Services
Woodward offers various Engineering Services for our products. For these services,
you can contact us by telephone, by email, or through the Woodward website.

Technical Support

Product Training

Field Service
Technical Support is available from your equipment system supplier, your local FullService Distributor, or from many of Woodward’s worldwide locations, depending
upon the product and application. This service can assist you with technical
questions or problem solving during the normal business hours of the Woodward
location you contact. Emergency assistance is also available during non-business
hours by phoning Woodward and stating the urgency of your problem.
Product Training is available as standard classes at many of our worldwide
locations. We also offer customized classes, which can be tailored to your needs
and can be held at one of our locations or at your site. This training, conducted
by experienced personnel, will assure that you will be able to maintain system
reliability and availability.
Field Service engineering on-site support is available, depending on the product
and location, from many of our worldwide locations or from one of our FullService Distributors. The field engineers are experienced both on Woodward
products as well as on much of the non-Woodward equipment with which our
products interface.
For information on these services, please contact us via telephone, email us, or
use our website: www.woodward.com.
54
Woodward
Manual 26640
RTCnet / LINKnet HT Nodes
How to Contact Woodward
For assistance, call one of the following Woodward facilities to obtain the address
and phone number of the facility nearest your location where you will be able to
get information and service.
Electrical Power Systems
Engine Systems
Turbine Systems
Facility---------------- Phone Number
Brazil ------------- +55 (19) 3708 4800
China ----------- +86 (512) 6762 6727
Germany--------- +49 (0) 21 52 14 51
India --------------- +91 (129) 4097100
Japan -------------- +81 (43) 213-2191
Korea -------------- +82 (51) 636-7080
Poland--------------- +48 12 295 13 00
United States ---- +1 (970) 482-5811
Facility---------------- Phone Number
Brazil ------------- +55 (19) 3708 4800
China ----------- +86 (512) 6762 6727
Germany------- +49 (711) 78954-510
India --------------- +91 (129) 4097100
Japan -------------- +81 (43) 213-2191
Korea -------------- +82 (51) 636-7080
The Netherlands - +31 (23) 5661111
United States ---- +1 (970) 482-5811
Facility---------------- Phone Number
Brazil ------------- +55 (19) 3708 4800
China ----------- +86 (512) 6762 6727
India --------------- +91 (129) 4097100
Japan -------------- +81 (43) 213-2191
Korea -------------- +82 (51) 636-7080
The Netherlands - +31 (23) 5661111
Poland--------------- +48 12 295 13 00
United States ---- +1 (970) 482-5811
You can also locate your nearest Woodward distributor or service facility on our
website at:
www.woodward.com/directory
Technical Assistance
If you need to telephone for technical assistance, you will need to provide the following information.
Please write it down here before phoning:
Your Name
Site Location
Phone Number
Fax Number
Engine/Turbine Model Number
Manufacturer
Number of Cylinders (if applicable)
Type of Fuel (gas, gaseous, steam, etc)
Rating
Application
Control/Governor #1
Woodward Part Number & Rev. Letter
Control Description or Governor Type
Serial Number
Control/Governor #2
Woodward Part Number & Rev. Letter
Control Description or Governor Type
Serial Number
Control/Governor #3
Woodward Part Number & Rev. Letter
Control Description or Governor Type
Serial Number
If you have an electronic or programmable control, please have the adjustment setting positions or
the menu settings written down and with you at the time of the call.
Woodward
55
RTCnet / LINKnet HT Nodes
56
Manual 26640
Woodward
Declarations
We appreciate your comments about the content of our publications.
Send comments to: icinfo@woodward.com
Please reference publication 26640.
PO Box 1519, Fort Collins CO 80522-1519, USA
1000 East Drake Road, Fort Collins CO 80525, USA
Phone +1 (970) 482-5811  Fax +1 (970) 498-3058
Email and Website—www.woodward.com
Woodward has company-owned plants, subsidiaries, and branches,
as well as authorized distributors and other authorized service and sales facilities throughout the world.
Complete address / phone / fax / email information for all locations is available on our website.
2013/1/Colorado