INSTALLATION GUIDE
DSC-1280 Rev 2.0a Installation Guide
Document Edition 2.8
Product Description
The DSC-1280 is a fully programmable, Native BACnet™
Building Controller that communicates on Twisted Pair
Ethernet 10-BaseT using BACnet IP and BACnet over
Ethernet, or on an RS-485 LAN using the BACnet MS/TP
protocol.
The controller includes an easy to mount enclosure and is
designed for a wide range of applications requiring no more
than 12 inputs and 8 outputs, including but not limited to Roof
Top Units, Air Handlers, Boilers or Chillers, etc. A second RS485 port may be configured as an MS/TP SubLAN or a
LINKnet network that supports up to 12 Delta BACstats or
other Delta LINKnet controllers.
Important Information
ORCAview OWS and controller firmware must all be of the same version number (i.e. 3.33) to
be compatible. When upgrading any of these products from older versions (i.e. 3.22 or 3.30),
you must upgrade all the remaining products.
Package Contents
Product: DSC-1280 (Rev. 2.0a)
DSC-1280 (Rev.2.0a) Installation Guide
Related Documents
Delta Controls Wiring Guidelines
ORCAview Operator Guide
ORCAview Technical Reference Manual
Release Notes for related Firmware
Document Edition 2.8
Delta Controls
Cautions or Warnings
This controller is an Electro-statically sensitive device. Proper ESD protection (ground strap)
should be used when installing this product so that damage to the product does not occur.
Danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent
type recommended by the manufacturer. Dispose of used batteries according to the
manufacturer’s instructions. Replace the battery with type CR2032.
Equipment damage or loss of data may occur if these procedures are not followed as specified.
Installations requiring CE conformance: All wiring for CE rated products must use an extra low
voltage (SELV) or protective extra low voltage (PELV) transformer. Use safety-isolating
transformers, (Class II transformer) per EN61558. The transformer must be rated for 100% duty
cycle.
Mounting
The DSC-1280 includes a plastic enclosure that can be quickly mounted with two screws (not provided). This
controller should be mounted in an appropriate location within packaged equipment or another enclosure that
meets code requirements.
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Document Edition 2.8
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Delta Controls
Board Layout
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Document Edition 2.8
Controller Configuration
Controller Type
Various products have the capability of being configured as one of several
possible controller types, which represents the network level that it will reside
on in the network architecture (Area, System, Subnet). Other than the one
controller acting as a router, all other controllers on the same network segment
must be configured the same.
AREA
SYSTEM
Area - Configures the controller as an Area level controller on a network. This
is an option only on the Ethernet model and is the setting when the controller is
connected to an Ethernet network (typically between buildings) and is acting as
a router from one LAN to either a network of System controllers or Subnet
controllers.
SUBNET
System - Configures the controller as a System level controller on a network of
System controllers. This is the setting when the controller is connected to an
Ethernet or BACnet MS/TP network with other System controllers or is a single
head-end controller for a network of Subnet controllers.
Subnet - Configures the controller as a Subnet level controller on a Subnet of
similar controllers. This is the setting when the controller is connected to a
BACnet MS/TP network with other Subnet controllers.
Note: This also determines where the DIP or MAC address is mapped into the
controllers BACnet address and which other portions of its BACnet address are
inherited when DNA is enabled.
Derived Network Addressing
DNA
The DNA jumper comes ON by default. This allows the controller to
automatically configure a BACnet controller address. This should NOT be
removed unless you are assigning a BACnet controller number through
software. The BACnet controller number should not be confused with the DIP
switch setting, and each controller must still have a unique dip switch address
even when using software to define the controller number.
Controller Addressing
The Dip Switch is a binary switch. Each individual DIP switch represents a
unique value, which forms the controller address when added together.
To set the address, simply move the switches that add up to the controllers
desired address to the ON position.
Example: If the controller is to be address 5 on the network, set the switch
numbered 4 and the switch numbered 1 (equals 5) to the On position.
Note: Each controller on the same MS/TP segment must have a unique DIP
switch address.
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Delta Controls
Wiring General
All wiring must conform to NEC and local codes and regulations. Use earth ground isolating step-down Class 2
transformers. Do not use autotransformers. Determine supply transformer rating by summing total VA of product
and output loads.
Risk of Electric Shock or Fire
More than one disconnect switch may be required to de-energize the
equipment before servicing.
Input Class 2 Power Supplies are interconnected. Use only Class 2
sources suitable for interconnections.
All terminals are acceptable for Class 2 Circuit connections only
Use copper conductors only
Apply minimum 6.0 lb-in torque for tightening field wires into the terminal
blocks
Power
This product is designed to use a 24VAC Class 2 power supply. A single transformer may be used to power
multiple controllers and/or auxiliary field devices (actuators, etc.) provided the following conditions are met:
All devices MUST be ½ wave rectified. Mixing power between ½ wave and full wave rectified devices
will damage both the transformer and connected equipment.
The transformer is properly sized, including line losses for the total VA requirements.
Polarity is observed between controllers (with respect to 24~ and Gnd).
Each controller is grounded as shown in the diagram below. This is important to protect equipment and
ensure a common ground reference for RS-485 communications.
The transformer secondary is fused for its maximum rated load (4A max for Class 2 circuits).
Make sure to ground the controller using the ground lug that is available on the
controller. The controller uses the ground lug to establish a common reference for
communications. If the controller is not grounded then communication problems
may occur.
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Document Edition 2.8
Network Communication
The controller communicates on Twisted Pair Ethernet 10-BaseT using BACnet IP and BACnet over Ethernet,
or on an RS-485 LAN using the BACnet MS/TP protocol. Refer to Delta Controls Wiring Guidelines for further
details.
MS/TP (RS485) Wiring
For detailed information on MS/TP and LINKnet wiring refer to Delta Controls Wiring Guidelines.
The proper specified cabling must be used to ensure reliable communications. (22-24 AWG
twisted pair, 100-120 ohms impedance, 17 pF/ft or lower capacitance, with a braided or aluminum
foil shield.)
Controllers should always be wired together in a daisy-chain fashion. Attempting to connect them
using a starred or bus configuration will cause problems on the network.
Networks with a total length greater than 4000 ft or with more than 50 controllers require a
repeater (RPT-768).
LINKnet networks that have only 1-2 controllers, and have less then 100 ft of cable length do not
require network terminators.
Input and Output Wiring
Inputs and outputs on the DSC-1280 controller follow the same general wiring connection diagrams as other
Delta Controls products. Refer to separate documentation for additional details.
Input Configuration
The input must be configured to accept the signal used by
the input device. Place the jumper for each input in the
correct location on the Input Type Selector Block. The
diagram to the right shows the factory default selection of
10 KΩ.
4-20mA
For sensors that use a 4 to 20 mA signal.
10K
For 10 KΩ Thermistor temperature
sensors, as well as Dry Contact binary
inputs.
5V
For sensors that use a 0 - 5 VDC signal.
10V
For sensors that use a 0 -10 VDC signal.
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Delta Controls
HAND
OFF
Each HOA switch is HAND, OFF, AUTO from right to left.
The HAND position allows a user to manually force the
output on, the OFF position allows a user to manually force
an output off, and the AUTO position allows the output to
be controlled automatically by the controller.
AUTO
Output Configuration
Indicators
LED
Function
Description
Power
Controller Power
Indicator
This yellow LED turns on to indicate that the controller has power
applied.
Scan
CPU Scan Indicator
This red LED flashes at a rate relative to the CPU scan rate.
Network
(Ethernet)
Ethernet
Communication
Status Indicators
The green LNK LED is turned on when a link is established
between two Ethernet devices. (for example, controller, computer,
switch, etc.) The green ACT LED flashes when communications
are active.
Network
(NET1)
MS/TP (RS485)
Communication
Status Indicators
The green LED flashes to indicate when the controller is
transmitting out the port, and the red LED flashes to indicate when
the controller is receiving data through the port. If communication
is good, both LEDs will flash at a high rate.
Network
(NET2)
MS/TP (RS485)
Communication
Status Indicators
The green LED flashes to indicate when the controller is
transmitting out the port, and the red LED flashes to indicate when
the controller is receiving data through the port. If communication
is good, both LEDs will flash at a high rate.
Inputs
(IP1 – IP12)
Input Status
Indicators
A corresponding red LED varies in intensity and is brightly lit when
the associated input is receiving a low voltage input signal (i.e. a
closed contact, 0 VDC, 4 – 20 mA or a high temperature reading
or low resistance).
Outputs
(OP1 – OP8)
Output Status
Indicators
A tri-color LED is used. Under automatic control, the
corresponding output LED is green and is on or off to match the
status of an associated binary output. The LED will also vary in
intensity relative to the output signal for an analog output. With
HOA switches, the output LED is red in the OFF position and
yellow in the HAND position.
Product Specifications
Power Requirements
24 VAC 50/60Hz or 24 VDC Class 2
Power Consumption
25 VA
Ambient Ratings
32° to 131°F (0° to 55°C), 10 to 90% RH (non condensing)
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Document Edition 2.8
Communication Ports
Ethernet
10 BaseT @ 10Mbps
BACnet IP, BACnet over Ethernet
NET1
BACnet MS/TP (RS-485)
Communication: 9600, 19200, 38400, 76800 bps (Default)
Maximum of 99 controllers
LINKnet
Communication: 76800 bps
Maximum of 12 LINKnet controllers including up to two DFM
controllers
BACnet MS/TP (RS-485)
Communication: 9600, 19200, 38400, 76800 bps (Default)
Maximum of 99 controllers
LINKnet
Communication: 76800 bps
Maximum of 12 LINKnet controllers including up to two DFM
controllers
Serial
RS-232
BACnet PTP
Communication: 9600 (default), 19200, 38400
Service
Port
RJ-11 Jack
Used with Delta Controls service tool devices (for example,
CON-768)
OR
NET2
OR
Inputs
12 Universal Inputs (10 bit), jumper configurable for the following input
types:
0-5 VDC
0-10 VDC
10 KΩ Thermistor
Dry Contact (using 10 KΩ Thermistor jumper setting)
4-20 mA
Outputs
8 Universal Outputs c/w LED status indication (including HOA status)
0-10 VDC @ 20 mA maximum per output
Software configurable as binary or analog
Hand/Off/Auto Switches (c/w position feedback)
Technology
32 bit processor
2 MB (16 megabit) Flash Memory
512 KB SRAM memory
Listings
UL 916 Listed
BTL Listed (with V3.30 Release 3 firmware only)
Compliance
CE
FCC
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Delta Controls
CE - DECLARATION OF CONFORMITY
according to ISO/IEC Guide 22 and EN 45014
Manufacturer's Name:
Delta Controls
Manufacturer's Address:
th
17850 56 Avenue
Surrey, British Columbia
Canada
V3S 1C7
declares that the product (s):
Product Name:
12 x 8 System Controllers
Model Numbers:
DSC-1280
Product Options:
All
conforms to the following Product Specifications:
EN 50081-1:1992
Generic Emission Standard Part 1: Residential
EN 55022:1998
Radiated and Conducted Emissions
EN 61000-3-3:1998
Power Line Fluctuations
Class A
Pst < 1, Plt < 0.65
EN 50082-1:1997
Generic Immunity Standard Part 1: Residential
EN 61000-4-2:1995
ESD Immunity
EN 61000-4-3:1996
RF Electromagnetic Field Immunity
ENV 50204:1995
RF Electromagnetic Field Immunity (Keyed Carrier)
EN 61000-4-4:1995
EFT/Burst Immunity
EN 61000-4-5:1995
Surge Immunity
EN 61000-4-6:1996
Conducted Immunity
EN 61000-4-11:1994
Voltage Dips / Interruptions
Level B
Level A
Level A
Level B
Level B
Level A
Level B/C/C
Supplementary Information
The product(s) herewith comply with the requirements of the EMC Directive 89/336/EEC. The
product(s) were tested in a typical configuration.
Lee Dickson
Quality Assurance Manager
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Document Edition 2.8
FCC Compliance Information
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to correct the interference at his own expense.
Industry Canada Compliance Statement
ICES-003 This Class A digital apparatus meets all requirements of the Canadian Interference-Causing
Equipment Regulations
Cet appareil numérique de la Classe A Respecte toutes les exigences du Règlement sur le matérial
brouiller du Canada.
This product conforms to the following UL requirements:
UL916: Energy Management Equipment
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