adapt 3701 40 machinery dynamics monitor 103m2037e

adapt 3701 40 machinery dynamics monitor 103m2037e
ADAPT 3701/40 Machinery Dynamics Monitor
Bently Nevada* Asset Condition Monitoring
Advanced Distributed Architecture Platform
Technology - ADAPT
GE’s Bently Nevada Advanced Distributed Architecture Platform Technology, or
ADAPT 3701, is a family of compact, high performance safety and machinery
protection and condition monitoring solutions. ADAPT products are targeted at
specific assets and applications, and excel at the intensive signal processing
necessary to identify early indicators of machine failure modes long before an
alarm.
Description
3701/40 Simplex
The 3701/40 Machinery Dynamics (MD) Monitor is designed for use on a broad
range of machine trains or individual casings where the sensor point count fits
the monitor’s channel count and where advanced signal processing is desired.
The 3701/40 is optimized for intensive signal processing required on complex
machinery such as gearboxes, planetary gearboxes, and roller element bearing
(REB) machines as well as offering advanced measurement capabilities on
conventional monitoring methods such as radial vibration, thrust position, and
casing absolute vibration. The 3701/40 Dual Redundant (DR) monitor is designed
for applications that require a higher level of reliability from the vibration system.
The 3701/40 has a rugged industrial design allowing it to be skid mounted close
to the machine and reduce installation wiring. Its compact size provides more
mounting options compared to traditional rack based solutions. It is capable of
accepting a wide array of sensor types, including eddy current proximity probes,
accelerometers, velocity, acceleration, dynamic pressure, Integrated Circuit
Piezoelectric Sensors (IEPE), and magnetic speed pick-ups.
The 3701/40 is configured and validated with Bently Nevada Monitor
Configuration (BNMC) software. BNMC is a simple and powerful configuration
and verification software. It is ordered separately and is required for operation.
3701/40 Duplex
The 3701/40 MD Monitor is a self-contained device that is ordered with a single
part number for either a simplex or duplex terminal base and is made up of the
following major components:
Part
3701 Simplex Terminal Base
3701 Processor Module
3701 Input Module
3701 Output Module
Part
3701 Duplex Terminal Base
3701 Processor Module
3701 Input Module
3701 Output Module
Quantity Required in each 3701/40
1
1
1 or 2
1 or none
Quantity Required in each 3701/40
1
2
1 or 2
1 or none
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 1 of 18
3701/40 Overview
The 3701/40 is a robust, compact, self-contained 12channel device with sophisticated signal processing
capability and with a form-factor suitable for
distribution close to machinery. It has a modular
construction that allows field changing of
components and is fully-configurable. It combines
protection and condition monitoring (CM) in a single
package. With the ability to define measurements
and alarms within the monitor, it can act as a standalone protection and CM system. There is no need
for any interaction with external software to trigger
or control the monitor during operation.
The 3701/40 DR Machinery Dynamics Monitor is a
compact, field mountable, vibration protection
system that utilizes dual redundant processor
modules.
In the DR version, each processor module is
identically configured and redundantly digitizes and
processes all sensor inputs, executes identical logic,
and each processor module independently drives
separate alarm relays.
3701 Digital Communications
The 3701/40 has two independent Ethernet physical
RJ45 connections per CPU for digital communication
with Bently Nevada software products hosted on
network computers and plant automation systems.
It uses a proprietary Ethernet protocol for
communicating with System1* Evolution software
and the BNMC configuration software.
The 3701/40 includes two Ethernet ports per CPU
which provide Ethernet TCP/IP communications
capabilities. Standard industrial protocols are:

Modbus TCP/IP
Modbus over Ethernet is available for
connection to HMI’s, unit control systems, or
other plant automation equipment. The
3701 can only be configured as a server.

Ethernet Global Data (EGD)
EGD is a GE protocol used on Mark VI and
Mark Vie controllers and by GE
Programmable Automation Controllers and
certain 3rd party automation equipment.
3701/40 System Description
The 3701/40 monitor is powered by single or dual
redundant external +24 V DC power. It consists of
four main physical components: the terminal base
(single or dual), one or two processor modules, one
or two input modules, and an output module.
The terminal base is the mounting platform for the
monitor. The different modules install into the
terminal base and two pluggable field wiring
termination blocks plug into the terminal base.
Sensor wiring terminates on the wiring blocks and
terminations for discrete inputs (Reset, Trip Multiply,
etc.) terminate directly on the base but on the
opposite side from sensor wiring.
The processor module is the monitor’s CPU. It is the
center of the logic and signal processing for the
monitor.
There are two terminal base configurations:
 A simplex base, which contains 1 CPU
processor card
 A duplex base which contains 2 CPU
processor cards.
The use of 2 processor cards allows for redundancy
for all the dynamic measurements; both processors
have access to all signal channels from each input
module.
The input modules are the interface to the sensors.
Each input module type covers multiple sensor
varieties but due to the number of sensor types
there are different input modules. The input modules
condition the analog sensor signals for delivery to
A/D conversion on the processor module. The input
modules are simple, reliable, analog circuitry but
with a simple microcontroller (outside the protection
path) to provide diagnostics and fault detection on
each module. Buffered transducer outputs are
provided at a multi-pin Dsub connector on each
input module. An accessory cable is available to fan
the buffered outs to BNC or ADRE 408 Dspi
compatible connectors.
The output modules are for monitor outputs such as
relay contacts or 4- 20 mA analog outputs. At the
current time only the 8-Channel Relay Output
Module is available. It contains 8 programmable
SPDT relays and a dedicated monitor Protection
Fault (OK) Relay. Relay logic is created in the BNMC
software using the graphical logic editor.
Processor Module
The processor module, or CPU module, performs A/D
conversion, digital signal processing, alarm and logic
processing, and communications to GE Bently
Nevada software and plant automation systems. The
CPU module employs sophisticated diagnostics and
fault detection processing to enhance reliability,
availability, and maintainability of the protection and
monitoring system.
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 2 of 18
Input Modules
3701 Proximitor* Accelerometer* Velomitor* (PAV) Input
Module
The 3701 PAV input module is a 6-channel +
Keyphasor*/speed input module that interfaces to a
variety of sensors such as: -24 Volt Proximitor
sensors, -24 Volt 3-wire Accelerometers, Velomitors,
and constant current 2-wire sensors that are
compatible with the -24 Volt 2-wire Velomitor
interface.
Any of the PAV’s six channels (1 – 6) can be
independently configured for one of the supported
transducers. Each PAV supports one dedicated
Keyphasor or speed measurement on channel 7 that
is configurable for Proximitor sensors or magnetic
pick-ups.
3701 Proximitor Accelerometer Seismic (PAS) Input
Module
The 3701 PAS input module is a 6-channel +
Keyphasor/speed input module that interfaces to a
variety of sensors such as: -24 Volt Proximitor
sensors, -24 Volt 3-wire Accelerometers, 2-wire
Seismoprobes and compatible 3rd party inertial mass
velocity sensors, or dynamic pressure sensors.
Any of the PAS’s six channels (1 – 6) can be
independently configured for one of the supported
transducers. Each PAS supports one dedicated
Keyphasor or speed measurement on channel 7 that
is configurable for Proximitor sensors or magnetic
pick-ups.
3701 Positive (PoV) Input Module
The 3701 PoV input module is a 6-channel +
Keyphasor/speed input module that interfaces to a
variety of positively powered sensors such as: +24 V
Proximitor sensors, +24 V Interface modules, and 2
wire IEPE sensors using 3.3 mA constant current.
The POV is available for use with the 3701/40,
3701/44 Aeroderivative Gas Turbine Monitor, and
3701/46 Hydro Monitor.
Output Modules
3701 8-Channel Relay Output Module
The 3701 8-Ch Relay Output Module provides 8 SPDT
relay outputs or 4 "virtual" DPDT outputs and a
dedicated Protection Fault relay. Relay logic is user
programmable in the BNMC software using the
graphical logic editor. The processor module
operates on the relay logic to drive relay state.
The Protection Fault relay is a normally energized
SPDT relay that will de-energize on fault conditions
that can compromise the monitor’s availability to
protect machinery. The protection fault relay is
similar to a traditional OK relay but certain
conditions that do not compromise protection will
not cause the Protection Fault relay to de-energize.
The relays are configured for Normally De-Energized
(NDE) or Normally Energized (NE) in four banks of two
relays each by using switches on the relay module.
The relays are set for NE for operation in the dual
redundant system.
Relay wiring terminates on the output module using
pluggable connectors and exits on the opposite side
of the monitor from the sensor inputs.
In dual redundant operation, processor module one
drives relays 1, 3, 5, and 7 and processor module two
drives relays 2, 4, 6, and 8. The relay alarm logic is
identical. External connection to an Emergency
Shutdown Device can use a 1oo2 or 2oo2
configuration depending on the user’s needs. Users
are recommended to perform a system analysis
using functional safety methods (IEC 61511, IEC
61508 or ISA SP84) before selecting a voting scheme.
Terminal Base
Any of the PoV's six channels (1-6) can be
independently configured for one of the supported
transducers. Each PoV supports one dedicated
negatively powered Keyphasor or speed
measurement on channel 7 that is configurable for
Proximitor sensors or magnetic pick-ups.
3701 Simplex Terminal Bases
The term “simplex terminal base” identifies, or
distinguishes this type of terminal base as one with a
single (simplex) processor module as opposed to a
dual (or duplex) terminal base with two processor
modules.
The POV is intended for interfacing to industry
standard 3rd party ICP sensors and also sensors that
use a 3 wire (power, common, signal) positive
voltage interface.
The 3701 simplex terminal base is the mounting and
installation component of the monitor. It supports a
single processor module, one or two input modules,
and an output module.
The terminal base mounts to a bulkhead, or
enclosure or wall sub-panel using the four mounting
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 3 of 18
holes at the corners of the base. Mount vertically for
optimal convection cooling.
3701 Dual Terminal Base
The Dual Terminal Base is similar in function to the
Simplex Terminal Base except that it has two CPU
processor modules instead of one. The extra CPU
module allows the user to use the two input modules
redundantly. Both CPU modules have access to all
the signal channels from each of the input modules.
Terminal base features:






Two pluggable terminal blocks provide
sensor wiring terminations that are
individually marked for the sensor wire type.
The termination blocks can be removed for
wiring ease or maintenance work and, when
installed, are fixed in place with a locking
mechanism.
A dedicated connection terminal for single
point connection to system earth.
A single point earth connection switch to
separate physical (chassis) earth from
system common (instrument earth) to
enable system common connection to an
external intrinsic safety earth.
Primary and Secondary connectors for
single or redundant +24 V DC power input.
Six discrete inputs (DI) for dedicated dry
contact DIs: Trip Multiply, Alarm/Relay
Inhibit, Latch Reset, Special Alarm Inhibit,
Run Mode, and IP/Account reset. There are
two sets of these six inputs on the dual
terminal base.
The terminal base also supports one
conditioned Keyphasor/Speed output for
each processor module and one input. The
conditioned I/O is for connecting
Keyphasors or Speed signals between two
or more 3701 monitors.
Channel Types, Sensors, and Measurements
Keyphasor/Speed inputs (one per input module). The
monitor supports the channel types listed here:






Acceleration
Dynamic Pressure
Radial Vibration
Thrust Position
Velocity
Keyphasor/Speed
Channel Type support by Input Module
Input
Module
Channel Types
PAS
Channels 1 - 6
Acceleration
Dynamic Pressure
Radial Vibration
Thrust Position
Velocity
Proximitor Speed
Magnetic Pickup Speed
Proximitor Speed (single and multi-event)
Acceleration
Dynamic Pressure
Radial Vibration
Thrust Position
Velocity
Proximitor Speed
Magnetic Pickup Speed
Proximitor Speed (single and multi-event)
Acceleration
Dynamic Pressure
Radial Vibration
Thrust Position
Velocity
Keyphasor/Speed (Proximitors, single
and multi-event or Mag pickup, single
and multi-event).
PAS Channel 7
PAV
Channels 1 - 6
PAV Channel 7
PoV
Channels 1-6
PoV Channel 7
PAV and PAS channels 1 – 6 can also be configured
to support an additional Keyphasor input provided it
is a single event per revolution, less than 10,000 rpm,
and uses a Proximitor sensor. This cannot be done
with the PoV module.
The 3701/40 Machinery Dynamics Monitor supports
a set of standard channel types and the common
sensors used with those channel types as well as
custom configurable sensors. Support for sensor
types is dependent on input module type as listed in
tables located below in this datasheet section. Each
channel type has default measurements that can be
enabled or disabled and each channel type can have
user customizable nX and bandpass measurements
added to the channel and then customized to the
application.
The 3701/40 can have up to 12 vibration input
channels (Six per input module) and 2
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 4 of 18
Input Module compatibility with acceleration inputs
Input
Module
PAS
PAV
PoV
Input Module compatibility with Proximitor sensors
Accelerometer or Accelerometer
Interface Module
Input
Module
155023-01 High Freq 200g Accel I/F Module
23733-03 Accel I/F Module
24145-02 High-Freq Accel I/F Module
330400 100 mV/g Accelerometer
330425 25 mV/g Accelerometer
330450 High Temp Accelerometer
350501 Acceleration Charge Amplifier
49578-01 Accel I/F Module
Custom
155023-01 High Freq 200g Accel I/F Module
23733-03 Accel I/F Module
24145-02 High-Freq Accel I/F Module
330400 100 mV/g Accelerometer
330425 25 mV/g Accelerometer
330450 High Temp Accelerometer
350501 Acceleration Charge Amplifier
49578-01 Accel I/F Module
Custom
GSI 122, 124 and 127 Galvanic Interface Unit
TP100 Commtest Accelerometer
TP500 Commtest Accelerometer
200350 Accelerometer
200355 Accelerometer
786-500 Wilcoxon Accelerometer
626B02 PCB Accelerometer
HS-170 Hansford Accelerometer
HS-100F series Hansford Accelerometer
CMSS-2100 SKF Accelerometer
351M35 PCB Accelerometer
PAS or PAV
PoV
(Keyphasor)
Proximitor Sensor
3300XL 8 & 11 mm
3300XL NSV
3300 RAM Proximitor
3300 5 & 8 mm
3300 16 mm HTPS
7200 5, 8, 11, 14 mm
Custom
Input Module compatibility with velocity inputs
Input
Module
PAS
PAV
PoV
Velomitors, Seismoprobes, and
interface modules
9200 Seismoprobe
74712 Hi Temp Seismoprobe
47633 Seismoprobe
86205 BoP Seismoprobe
Custom
330500 Velomitor
330525 Velomitor XA
190501 Velomitor CT
330750 High Temp Velomitor
330752 High Temp Velomitor
330505 Low Freq Velocity Sensor
330530 Radiation Resistant Velomitor
Custom
HS-160 Velocity Sensor
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 5 of 18
Input Module compatibility with dynamic pressure inputs
Input
Module
3-Wire (Com/Sig/-24VDC) 350500 DPCA
PAV
3-Wire (Com/Sig/-24VDC) 350500 DPCA or
PCB 102M206
2-wire PCB 121A21
2-wire PCB 121A44
2-wire PCB 121A22
Measure
Bandpass
Dynamic Pressure Sensor
PAS
PoV
Input
Type
Accel
nX
Measurements
Each channel type has a set of default
measurements typical of the channel type. In
addition, user customizable nX vectors and
bandpass measurements may be added to each
channel.
The number of measurements that can be added
and enabled depends on the signal processing
capability of the processor module. There is no
limitation, other than processor performance, to the
number of measurements that can be added to a
single channel or across all channels. A performance
calculator in the BNMC software provides feedback
during the configuration process on performance
margin as measurements are added or removed
and their attributes modified.
Bandpass
nX
Veloc
Bias
Bandpass
Radial
Vibe.
nX
Configurable Attributes (1)
Full scale range
Units (g’s or m/s2 peak or rms; or
integrated accel: in/s or mm/s peak
or rms)
High pass corner frequency
Low pass corner frequency
High pass filter order (1,2,4,6, or 8th )
Low pass filter order (1, 2, 4, 6, or
8th)
Clamp value (amplitude)
Full scale range
Keyphasor association
Integer or non-integer order in
increments of 0.1x from 0.1x to
100x (phase not valid for noninteger orders).
Units (g’s or m/s2 peak or rms; or
integrated accel: in/s or mm/s peak
or rms)
Clamp value (amplitude and phase)
Full scale range
Units (in/s or mm/s peak or rms; or
integrated veloc: mils or µm peakpeak or rms)
High pass corner frequency
Low pass corner frequency
High pass filter order (1,2,4,6, or 8th )
Low pass filter order (1, 2, 4, 6, or
8th)
Clamp value (amplitude)
Full scale range
Keyphasor association
Integer or non-integer order in
increments of 0.1x from 0.1x to
100x (phase not valid for noninteger orders).
Units (in/s or mm/s peak or rms; or
integrated veloc: mils or µm peakpeak or rms)
Clamp value (amplitude and phase)
Low Pass Corner Frequency
Clamp Value (Volts)
Full scale range
Units (mils or µm peak-peak or rms)
High pass corner frequency
Low pass corner frequency
High pass filter order (1,2,4,6, or 8th )
Low pass filter order (1, 2, 4, 6, or
8th)
Clamp value (amplitude)
Full scale range
Keyphasor association
Integer or non-integer order in
increments of 0.1x from 0.1x to
100x (phase not valid for nonSpecifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 6 of 18
Input
Type
Measure
Gap
Bandpass
Thrust
Pos.
nX
Bias
Bandpass
Dyn
Prssr
nX
Bias
Speed
Prox
Speed
Mag
Pickup
Speed
Gap
Speed
Configurable Attributes (1)
integer orders).
Units (mils or µm peak-peak or rms)
Clamp value (amplitude and phase)
Low Pass Corner Frequency
Clamp Value (Volts)
Full scale range
Units (mils or µm peak-peak or rms)
High pass corner frequency
Low pass corner frequency
High pass filter order (1,2,4,6, or 8th )
Low pass filter order (1, 2, 4, 6, or
8th)
Clamp value (amplitude)
Full scale range
Keyphasor association
Integer or non-integer order in
increments of 0.1x from 0.1x to
100x (phase not valid for noninteger orders).
Units (mils or µm peak-peak or rms)
Clamp value (amplitude and phase)
Low Pass Corner Frequency
Clamp Value (Volts)
Full scale range
Units (psi dpp, psi pp, psi rms, mbar
dpp, mbar pp, mbar rsm)
High pass corner frequency
Low pass corner frequency
High pass filter order (1,2,4,6, or 8th )
Low pass filter order (1, 2, 4, 6, or
8th)
Clamp value (amplitude)
Full scale range
Keyphasor association
Integer or non-integer order in
increments of 0.1x from 0.1x to
100x (phase not valid for noninteger orders).
Units (psi dpp, psi pp, psi rms, mbar
dpp, mbar pp, mbar rsm)
Clamp value (amplitude and phase)
Low Pass Corner Frequency
Clamp Value (Volts)
Top Scale
Clamp Value
Low Pass Filter Frequency
Clamp Value (Volts)
Top Scale
Clamp Value
(1) Technically feasible configurations depend
on the interaction between many factors.
Certain selections may not be feasible. Use
the BNMC software to create an off-line
configuration to determine technical
feasibility.
Waveforms and Spectral Data
Acquisition of multiple synchronous and
asynchronous waveforms can be configured for
each 3701 channel in the BNMC software. These
waveforms are used as the data source for
extraction of measurements that require spectral
data such as nX vectors and peak extractions.
Waveform configuration for spectral data consists of
fmax and the number of lines in the spectral data.
Asynchronous spectral waveforms:
Fmax can be set between 10 Hz and 40 kHz in
12 discrete steps. Fmin is always at 0 Hz.
The number of spectral lines can be set
from 12.5 to 3200 in 12 discrete steps.
Synchronous spectral waveforms:
Number of samples per revolution can be
set from 8 to 4096.
Number of revolutions per waveform can be
set from 1 to 1024.
Amplitude Extractions
An amplitude extraction is the amplitude at a user
configured center frequency and with a user
configured bandwidth. The band around the center
frequency is limited in size and can range from a
single spectral line (bucket) closest to the configured
center frequency, to the center spectral line plus 5
lines on each side (11 total buckets).
The source data for amplitude extractions are
asynchronous spectrums.
Multiple amplitude extractions can be configured on
a single channel and across multiple channels.
Spectral Bands
Spectral bands are user configured with a start and
a stop frequency and return the average energy in
the band.
The source data for spectral bands are synchronous
and asynchronous spectrums using either enveloped
spectral or ordinary spectral data.
Multiple spectral bands can be configured on a
single channel.
Applications for spectral bands and other signal
processing features are described in the Applications
section of this datasheet.
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 7 of 18
Alarming and Setpoints
Alert and Danger over and under alarm setpoints
can be created individually for each measurement.
Additionally, alarm attributes such as enable/disable,
alarm time delay (ATD), and latching/non-latching
can be independently configured on each
measurement.
In addition, the alarming attributes (enable/disable,
ATD, and latching/non-latching) can be set
independently on the Alert and Danger alarms on
the same measurement.
Relay logic is created in the graphical relay logic
editor in BNMC software by mapping the enabled
alarms to OR and AND gates to drive a relay.
Individual relays can be configured as latching/nonlatching or enabled/disabled independently (or in
addition to) the settings on the measurement alarms.
Network Operation
The processor module supports two Ethernet RJ45
physical connections located on the terminal base.
The two connectors are termed Net A and Net B and
each has its own configurable IP address. All
configuration and interface to Bently Nevada
software as well as communication using an
industrial protocol is with one or both of these
connections.
Windows® 7 and 8.1 (32 bit and 64 bit) and Microsoft
Windows 2008 and 2012 Server (64 bit).
Language support at the current time is English
version operating systems with keyboard preference
set to English.
BNMC is ordered separately from the monitor
hardware. See the spares section in the
Specifications portion of this datasheet for the part
number.
System 1 Evolution Connectivity
3701 monitors connect to System 1 Evolution and
support current value and time-based data
collection of all static values, waveforms, and
spectral data. This includes System 1’s full suite of
plots and tools for conditioned monitoring and asset
management.
Applications
This section describes selected applications where
3701 function and feature offers particular benefits.
Dual Redundant Protection
A typical dual redundant protection only application
has these basic elements:
Discrete
Contacts
RJ-45
RJ-45
Discrete
Contacts
RJ-45
RJ-45
Input
Module
1
Input
Module
2
XDCR
PWR
XDCR
PWR
Relay
Module
Display and HMI Options
GE Bently Nevada offers System 1* Basic as a simple,
low cost, easily installed, and light footprint HMI.
System 1 Basic is part of the System1: Evolution
platform and offers a subset of System 1 Evolution
functionality to provide a basic operator display.
The Modbus TCP or EGD industrial protocols can be
used to serve data to an HMI where users can build
display environments using standard 3 rd party HMI
software.
Local
Display
Power 1
+24V
Power 2
+24V
BNMC is simple configuration software with a
nominal price that is used for monitor configuration.
It also has snapshot viewing of timebase waveforms
(including Keyphasor/Speed) and spectrums to
support commissioning and setup of the 3701 and
sensor instrumentation system. Bently Nevada
Monitor Configuration software will run on most
Windows desktop or notebook computers and is
designed and fully tested for operation on Microsoft®
Processor
Module 2
Terminal
Block
Assembly
1
Terminal
Block
Assembly
2
DCS
K
P
H

Bently Nevada Configuration Software (BNMC)
BNMC software is necessary to configure and verify
the 3701/40 Machinery Dynamics Monitor.
Processor
Module 1



X
D
C
R
X
D
C
R
X
D
C
R
X
D
C
R
X
D
C
R
X
D
C
R
K
P
H
X
D
C
R
X
D
C
R
X
D
C
R
X
D
C
R
X
D
C
R
X
D
C
R
Each processor module processes all sensor
and Keyphasor input signals and has
communication (Ethernet) connections only
to the controls and automation system.
Each processor is configured the same and
executes identical logic.
Processor module 1 drives relays 1, 3, 5, and
7. Processor module 2 drives relays 2, 4, 6,
and 8. The same alarm logic is used for each
relay pair (1, 2), (3,4) etc.
An external shutdown system connects to
relay pairs and votes 1oo2 or 2oo2
depending on application requirements.
(The 1oo2 configuration is for SIL 2
applications.)
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 8 of 18




The dedicated protection fault relay is
driven by a protection fault in either of the
processor modules and is driven if one
processor module is removed.
If redundant sensors are required, they can
be voted 2oo2 or 1oo2 in the 3701
processor modules. SIL 2 applications
require voting the 3701 relays 1oo2 in an
external ESD but the alarm voting in the
3701 processors can provide the 2oo2 vote.
System configuration can be varied in a
number of ways to meet different reliability
requirements. Redundant sensors can be
used partially or entirely. Non-redundant
sensor points, such as XY radial shaft
vibration probes, on the same bearing can
also be split between input modules.
Redundant industrial protocols can operate
independently from each processor module
to automation and control systems.
Dual Redundant Protection with a System 1 Connection
This optional configuration operates the same as
described above but Processor Module 1 connects to
System 1 using one of its Ethernet ports. Cyber
security is the key design element that must be
addressed in this configuration.
synchronous axial vibration at the onset of a surge
condition – a bandpass timebase measurement or
synchronous spectral band measurement on an
axial position probe can enhance detection of this
specific fault mode.
Roller Element Bearings
Use spectral bands to focus on bearing fault
frequencies. ( nX measurements can also be used
but the spectral band allows customizing the
bandwidth to the bearing fault frequency response
whereas the nX measurement is narrow band.)
Outer Race Ball Pass
(ORBP)
Inner Race Ball Pass (IRBP)
Cage
Ball Spin 1X
Discrete
Contacts
RJ-45
System 1
RJ-45
Discrete
Contacts
RJ-45
RJ-45
Local
Display
Power 1
+24V
Power 2
+24V
Processor
Module 1
Processor
Module 2
Input
Module
1
Input
Module
2
XDCR
PWR
XDCR
PWR
Terminal
Block
Assembly
1
Relay
Module
Ball Spin 2X
Overall and non-REB fault
frequencies
Terminal
Block
Assembly
2
DCS
K
P
H
X
D
C
R
X
D
C
R
X
D
C
R
X
D
C
R
X
D
C
R
X
D
C
R
K
P
H
X
D
C
R
X
D
C
R
X
D
C
R
X
D
C
R
X
D
C
R
X
D
C
R
Radial Shaft Vibration, Axial Position, and Casing
Vibration
3701 supports the standard industry measurements
for these applications but, in addition, users can
create custom measurements on these channels
using spectral bands, bandpass timebase
measurements, amplitude extractions, nX
measurements, integrated and non-integrated, and
rms or peak measurements.
Detection of certain mechanical, aerodynamic, and
hydraulic, faults can be enhanced by improved
measuring capability. For example, on an axial
compressor there may be increased sub-
HF band
A spectral band using
synchronous enveloped or
non-enveloped data can be
set around the expected
ORBP
A spectral band using
synchronous enveloped or
non-enveloped data can be
set around the expected
IRBP
A spectral band using
synchronous enveloped or
non-enveloped data can be
set around the expected
cage frequency
A spectral band using
synchronous enveloped or
non-enveloped data can be
set around the expected
ball spin 1X frequency
A spectral band using
synchronous enveloped or
non-enveloped data can be
set around the expected
ball spin 2X frequency
Set one or more bandpass
measurements to look at
overall vibration at
frequencies where rotor,
casing, or structural
vibrations are expected.
nX measurements can also
be used for rotor related
vibration.
Set a spectral band using
enveloped synchronous or
asynchronous data sources
on a broader high
frequency band to detect
low level impact events.
(A simple bandpass with an
appropriately set high pass
filter can be configured in
addition.)
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 9 of 18
Gear Boxes
There are many types of gear boxes with correspondingly
different vibration monitoring needs. This short section is
intended only to highlight some particular features of the
3701 system.
Feature
Gear Mesh (GM) 1X, 2X, or
3X
Gear Mesh Side Bands
Enhanced measurements
from Radial Vibration
Proximitors
Enhanced measurements
from Thrust Position
Proximitors
Description
Set a synchronous spectral
band, or an nX
measurement (or both) on
the 1X, 2X, and 3X GM. For
each gear set.
If you know the
fundamental frequency of
an expected side band
based on your gear
kinemantics then you can
set a synchronous spectral
band on a specific
sideband.
For API 613 gearboxes
where XY radial vibration
probes are typically
specified you can set the
GM related spectral bands
described above as well as
nX’s based on hi and low
speed shaft Keyphasors.
For API 613 gearboxes
where axial position probes
are typically specified. Axial
vibration can be measured
by setting bandpass filtered
or nX measurements in
addition to the conventional
thrust position
measurement.
Gas Turbine Combustion Dynamic Pressure
Spectral bands and/or amplitude extractions as well as
bandpass filtered timebase measurements can be
configured to selectively monitor the different tones
produced by pressure pulsations in combustion turbines.
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 10 of 18
Specifications
3701/40 Monitor Power Requirements
Input Voltage
24 VDC nominal
Min: 18VDC
Max: 36VDC
Non-isolated
Current
2.3 amps max current (Simplex)
3.0 amps max current (Duplex)
Inrush Current
3.0 amps max inrush less than 5
mS (Per processor card)
Supply must be 2006/95/EC Low Voltage Directive
compliant for CE installations.
Supply must be Class I, Div 2 or Class 1, Zone 2, (CL2
SELV), compliant for hazardous area Installations.
3701/40 Processor Module Specifications
Inputs
Max: 12 dynamic signals and 2
Keyphasor/speed signals
Signal/Noise Ratio
110db @ 102.4 ksps
A/D Conversion
Sigma- Delta 24 bit.
Bandwidth
0.0625Hz to 40Khz
Outputs
Two Independent Ethernet ports
Net A: 10/100 BaseT
Net B: 10/100 BaseT
Buffered Signal Outputs
15 pin DSUB connector, available
accessory cable for BNC and SMC
options.
550 ohm output impedance
LEDs
Module OK LED
Indicates when the module is
functioning properly.
Protection Fault LED
Indicates that the monitor has
experienced a fault that is affecting
protection
User Inhibit LED
Indicates that there has been a
user initiated inhibit of alarming
functionality
Attention LED
Indicates a condition on the
monitor has occurred that may
require action
Danger LED
Indicates a Danger condition
Alert LED
Indicates and Alert condition
KPH 1 OK LED
Indicates that Keyphasor signal 1 is
triggering.
KPH 2 OK LED
Indicates that Keyphasor signal 2 is
triggering.
NetA
Indicates that Network A has a
valid link
TX/RX A
Indicates that network traffic is
flowing on Network A
Net B
Indicates that Network B has a
valid link
TX./RX B
Indicates that network traffic is
flowing on Network B
PWR 1 OK
Indicates that the first power input
is functioning correctly
PWR 2 OK
Indicates that the second power
input is functioning correctly
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 11 of 18
Accuracy
Direct pk or rms
Within ± 0.5% of full-scale typical,
1.1% Worst Case
Bias
+0.4 V / -0.8 V typical, +0.8V / -1.34
V worst case.
Tracking filters
nX tracking filters are have a
bandwidth of 0.075X, where X is the
speed of the associated speed
channel.
Phase Accuracy:
Dedicated Speed Input
± 1 degree up to 120,000 rpm
Auxiliary Proximitor Speed Input
± 1 degree up to 10,000 RPM
Auto Threshold
Use for any input above 1 rpm for
1 event/resolution.
Manual Threshold
User selectable from +3.5 to -23.5
Vdc.
Hysteresis:
User selectable from 0.2 to 10
volts.
Alarming
Setpoints
Over/under user configurable
Signal Amplitude:
Minimum signal amplitude for
trigger is 2 volts peak-to-peak.
Time Delay
100mS – 60 minutes
Latching
User configurable alarming or relay
latching
Note: Refer to Hazardous Area Special Considerations
Section for Maximum Magnetic Pickup amplitude
requirements for hazardous area applications.
Input Impedance
Relay Output Specifications
All 3-wire Inputs (PAS & PAV)
Nominal input impedance is 10 k.
Relay Type
Single Pole Double Throw (SPDT).
Normally Open (NO), Normally
Closed (NC), and Armature (ARM)
contacts
2-Wire Input – PAS (Siesmaprobes)
Nominal differential input
impedance is 9.98 k.
2-Wire Input – PAV (Velomitors)
Nominal constant current is 3.3267
mA.
Speed Signal Inputs
Speed Range:
Dedicated Speed/Keyphasor Input
1 to 120,000 rpm
Auxiliary Proximitor Keyphasor Input
1 to 10,000 rpm
Conditioned Speed/Keyphasor Input
1 to 120,000 rpm
Contact Ratings
5A/250 Vac/1500 VA Max.
5A/250 Vdc/150 VA Max.
Minimum Switching Current
12Vdc/100mA
Normally De-Energized (NDE) or Normally
Energized (NE)
NDE/NE independently selectable
for relay pairs 1-2, 3-4, 5-6 and 7-8.
Note: Refer to Hazardous Area Special Considerations
Section for Relay specifications when used in
hazardous area applications.
Speed Resolution
1 to 100 rpm ± 0.1 rpm
100 to 2000 rpm ± 1 rpm
Gap
±8.2 mV typical
±22.3 mV worst case
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 12 of 18
3701/40 Environmental Specifications
Indoor Use Only
Operating
Temperature
Range
Mounting (Simplex and Duplex)
Bulkhead
4 mounting bolts or screws at
corners.
Compliance and Certifications
-30 C to +65 C†
(-22 F to 149 F)
EMC
Standards
EN 61000-6-2
EN 61000-6-4
† If
the 3701 is operated 100% at +65C, its life will be
reduced to approximately 11 years. Any portion of the
time it is operated below +65C or any convective
airflow will increase its lifespan.
European Community Directives:
2004/108/EC
Electrical Safety
Storage
Temperature
Range
Standards
EN 61010-1
-40C to +85C
(-40 F to 185 F)
Relative
Humidity
0% to 95% rH non-condensing
Operating and Storage
Vibration
5g @ 57-500 Hz.
IEC 60068-2-6
Shock
European Community Directives:
2006/95/EC Low Voltage
Cyber Security
Achilles Communications Certification
Level1
Certification in process. Contact Bently
Nevada)
Hazardous Area Approvals
15g, 11ms
IEC 60068-2-27
For a detailed listing of country and product specific
approvals, refer to the Approvals Quick Reference
Guide (document 108M1756) located at the
following website: www.GEmeasurement.com.
< 2000 m (6,562 ft)
CSA/NRTL/C
Altitude
Class 1 Div 2, Groups A-B-C-D; T4
AEx/Ex nA IIC T4 Gc
T4 @ -30 °C to +65 °C
Installed per drawing 100M0771
CSA 14.2712664
Pollution Degree
Pollution Degree 2
Installation Category
Category II
ATEX
II 3G
Ex nA nC IIC T4 Gc
[email protected] -30°C ≤Ta ≤ +65°C
SIRA 15ATEX4288X
Physical
Simplex Base Dimensions
26.7 x 20 x 18.2 cm (10.5 x 7.87 x
7.15 in)
Simplex Weight
4.5 kg (9.9 lbs)
Duplex Base Dimensions
1180
IECEx
Ex nA nC IIC T4 Gc
[email protected] -30°C ≤Ta ≤ +65°C
IECEx SIR15.0099X
26.7 x 27.7 x 18.2 cm (10.5 x 10.9
x 7.16 in)
Duplex Weight (fully loaded)
7.7 kg (17.1 lbs)
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 13 of 18
Hazardous Area Special Considerations
Spares

3701/40
Power supplies must be Class I, Div 2 or Class 1,
Zone 2 compliant for hazardous area
installations.
 Hazardous area installations require relay
contact voltages below 30 Vac rms, or 30 Vdc to
minimize hazard.
 Hazardous area installations require relay
contact amperages below 5 Amps DC, or AC to
minimize hazard.
 Hazardous area installations require relay
contact power below 100 Watts DC, or 100 VA
AC to minimize hazard.
 Hazardous area installations require interterminal base connectors to remain unused.
 Magnetic Pickup input amplitude must not
exceed 60Vrms to minimize hazard.
 Reference 100M8172 section 3 for additional
Hazardous Area restrictions and information
regarding installation of the 3701/40 system.
For further certification and approvals information,
visit the following website: www.GEmeasurement.com
3701/40 Machinery Dynamics
Monitor
177896-01
3701/40 Processor Module
177988-01
Prox Accel Seismic (PAS) Module
177989-01
Prox Accel Velom (PAV) Module
289602-01
Positive Input (PoV) Module
177897-01
3701 Output Relay Module
175794-01
3701 Simplex Terminal Base
177992-01
Ordering Information
For a detailed listing of country and product specific
approvals, refer to the Approvals Quick Reference
Guide (document 108M1756) located at the
following website: www.GEmeasurement.com.
3701/40–AXX–BXX–CXX-DXX- EXX
A:
Redundancy
01
Simplex
02
Duplex
B:
Input Module 1
00
None
01
Prox/Accel/Velom
02
Prox/Accel/Seismic
04
Positive Input Module
C:
Input Module 2
00
None
01
Prox/Accel/Velom
02
Prox/Accel/Siesmic
04
Positive Input Module
D:
Output Module
00
None
01
8 CH Relay Module
E:
Approvals
00
None (This does include the
non-Hazardous area general
safety certification)
01
CSA
02
ATEX/IECEx
XX
Country specific
3701 Terminal Block – Standard
100M9465-01
Bently Nevada Monitor
Configuration (BNMC) SW DVD
178372-01
3701 Terminal Block - Duplex
Accessories
323314-01
323314-02
Buffered Output cable 15 pin D-Sub
to 7 SMA connectors. (SMA
connectors work with the ADRE
408)
Buffered Output cable 15 pin D-Sub
to 7 BNC connectors
324343
Nema 4 Weatherproof Housing Kit
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 14 of 18
2
3
4
1
5
1.
2.
3.
4.
5.
Processor Module
Input Module 1
Input Module 2
Output Module
Terminal Base
3701/40 Simplex Terminal Base Top View
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 15 of 18
1.
2.
3.
4.
5.
Processor Module(s)
Input Module 1
Input Module 2
Output Module
Terminal Base
3701/40 Duplex Terminal Base Top View
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 16 of 18
3701/40 Simplex Terminal Base Side View
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 17 of 18
3701/40 Duplex Terminal Base Side View
*Denotes a trademark of Bently Nevada, Inc., a wholly owned subsidiary of General Electric Company.
©
2014-2015 Bently Nevada, Inc. All rights reserved.
Printed in USA. Uncontrolled when transmitted electronically.
1631 Bently Parkway South, Minden, Nevada USA 89423
Phone: 1-775.782.3611 Fax: 1-775.215.2873
www.GEmeasurement.com
Specifications and Ordering Information
Part Number 103M2037-01
Rev. E (10/15)
Page 18 of 18
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