INSTALLATION INSTRUCTIONS
® U.S. Registered Trademark
Copyright © 2024 Honeywell Inc. • All Rights Reserved
31-00614-01
Unitary
CONTROLLER-24 VAC/VDC
General ............................................................................ 3
Trademark Information ............................................... 3
Product Description...................................................... 3
Controller Part Numbers ............................................ 4
Dimensions ...................................................................... 4
Unitary Controller Large....................................... 4
Unitary Controller Small....................................... 5
Network Security .......................................................... 5
General Safety Instructions....................................... 5
Specifications................................................................ 6
Electrical ........................................................................... 6
Operational Environment........................................... 6
Hardware........................................................................... 6
Communications ........................................................... 6
T1L Communication..................................................... 7
Supported Devices* ...................................................... 7
Weight and Dimensions.............................................. 7
Universal IO*.................................................................... 7
Wire Gauge Range......................................................... 8
Solid State Relay (SSR)................................................ 8
Relays ................................................................................. 8
Hardware overview....................................................... 9
System Overview............................................................ 9
Service Button................................................................. 10
Mounting ..................................................................... 10
Before Installation......................................................... 10
DIN Rail Mounting ........................................................ 10
Wall Mounting ................................................................ 11
Power Supply.............................................................. 12
General Information ..................................................... 12
Power Wiring.................................................................... 12
Power Wiring Examples............................................... 13
Grounding......................................................................... 13
Input / Output Wiring .............................................. 14
Wiring Requirements ................................................... 14
Internal Wiring Examples........................................... 15
Terminal Connections.................................................. 17
UIO Wiring Examples ................................................... 19
SSR (DO) Wiring Examples........................................ 20
Auxiliary Wiring Examples ........................................ 21
DO Relay Wiring Examples ........................................ 21
Network Concepts..................................................... 22
The RS-485 Standard .................................................. 22
TIA/EIA 485 Cable Specifications .................... 22
IP Network Topologies ................................................. 22
Daisy Chain Topology .................................................. 22
Ring Topology.................................................................. 22
BACnet™ IP Controller.............................................. 23
Connecting to an IP network .................................... 23
DHCP IP Configuration............................................... 23
Link-local addressing.................................................. 23
BACnet™ MS/TP Wiring........................................... 24
Auto Baud rate functionality..................................... 24
Termination Resistors ................................................. 24
Shield Termination ....................................................... 24
BACnet™ MS/TP Wiring Example........................... 25
BACnet™ MS/TP Wiring Setup Using Signal
Common Example........................................................ 25
BACnet™ MS/TP Controller .................................... 26
BACnet™ MS/TP Limitations ................................... 26
Physical Limitation ................................................ 26
AutoMAC limitation................................................ 26
Automatic MAC Addressing ...................................... 26
Set the MS/TP MAC Address.................................... 26
Set the Device Instance Number...................... 27
T1L Communication standard ............................... 28
Daisy Chain Topology.................................................. 28
Ring Topology................................................................. 28
Modbus RTU................................................................ 29
Wiring Topology ............................................................. 29
Cables and Shielding................................................... 29
Modbus RS-485 Repeaters....................................... 29
Modbus Client Specifications.................................. 29
Modbus Compliance.................................................... 29
Modbus Considerations............................................. 30
Sylk™ ............................................................................. 31
Supported Sylk™ devices............................................ 31
Sylk™ Wiring Example ................................................. 32
Troubleshooting......................................................... 33
LED Interface.................................................................. 34
Controller LED Status ................................................. 34
Bluetooth LED Status.................................................. 35
BACnet™ MS/TP LED Status.................................... 35
Modbus LED Status..................................................... 35
T1L LED Status.............................................................. 36
Service Pin LED Status ............................................... 36
Regulatory Information ........................................... 37
FCC Regulation.............................................................. 37
ISED non-interference disclaimer ......................... 37
Professional Installation Warning ................... 37
Wireless Connectivity .................................................. 37
CE Statement.................................................................. 38
Standards and Compliance ...................................... 38
Approvals and Certifications .................................... 38
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