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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
® U.S. Registered Trademark
Copyright © 2024 Honeywell Inc. • All Rights Reserved
INSTALLATION INSTRUCTIONS
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
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
31-00614-01
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Table of Contents
Related Manuals for Honeywell UN-RL1644MS24NMC
Summarization of Contents
General Product Information
Product Description
Details the Honeywell 24 VAC/VDC Unitary controller's features, benefits, and capabilities for flexible building control.
Dimensions and Part Numbers
Provides physical dimensions for large and small controllers and explains the part number structure.
Safety and Security
General Safety Instructions
Outlines essential safety precautions for installing, mounting, and operating the Unitary controllers.
Network Security Guidelines
Offers advice on protecting the controller from cyber threats via private networks and firewalls.
Specifications
Electrical and Hardware Specs
Details electrical ratings, power consumption, CPU, memory, and Ethernet specifications.
Operational Environment
Specifies storage and operating temperature, humidity, and enclosure protection ratings.
Communications
Lists supported communication protocols (BACnet, Modbus, Bluetooth) and IP addressing modes.
Hardware Overview
System Architecture
Illustrates how the Unitary controllers integrate into a building automation system with various network types.
Controller Component Layout
Diagrams showing the physical layout of ports and features on IP, MS/TP, and T1L controller models.
Installation and Mounting
Pre-Installation Checks
Recommends keeping the unit at room temperature before applying power to prevent condensation.
Mounting Methods
Provides step-by-step instructions for mounting the controller on a DIN rail or a wall.
Power Supply and Wiring
Power Supply Requirements
Covers voltage input, maximum power draw, and transformer guidelines for powering controllers.
Wiring Best Practices
Details wire gauge recommendations, polarity, and connection rules for power and signal wiring.
Grounding Procedures
Explains the importance of functional grounding and how to connect the earth ground terminal.
Input/Output Wiring
Wiring Requirements
Specifies wire gauge, stripping length, and methods for connecting multiple wires to terminals.
Wiring Examples
Illustrates internal wiring for large/small controllers, UIO, SSR, and relay outputs.
Terminal Pinouts
A comprehensive table listing all terminal numbers, labels, and their descriptions.
Network Concepts and Protocols
RS-485 and IP Network Topologies
Describes RS-485 standards, IP network types, and topology options like daisy chain and ring.
BACnet™ Network Setup
BACnet™ IP Controller Configuration
Details connecting to an IP network, DHCP, and link-local addressing for IP controllers.
BACnet™ MS/TP Wiring and Configuration
Covers MS/TP wiring, limitations, termination, shield grounding, and MAC address setup.
T1L Communication Standard
Explains the 2-wire IP communication standard, its distance capabilities, and topology options.
Modbus and Sylk™ Integration
Modbus RTU Configuration
Provides details on Modbus RTU wiring, repeaters, client specifications, and important considerations.
Sylk™ System
Lists supported Sylk™ devices and provides wiring examples for connecting them.
Troubleshooting and Diagnostics
LED Status Indicators
Explains the meaning of various LEDs on the controller for different status conditions.
Regulatory and Compliance Information
FCC and ISED Compliance
Details compliance with FCC (US) and ISED (Canada) regulations for radio frequency devices.
CE and Chemical Compliance
Covers CE marking, wireless restrictions, and REACH substance communication requirements.
Approvals and Standards
Lists certifications such as UL, CSA, BACnet BTL, and RoHS conformity.
Appendix: Sensor Data
Sensor Accuracy and Failure
Provides tables for sensor input accuracy and thresholds for recognizing sensor failures.
Sensor Characteristics Tables
Detailed data tables for various sensor types including NTC, PT, and Nickel RTDs.
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