UN-RL1644MS24NMC

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Product Information

Optimizer Unitary Controller, 16UIO,4SSR,4Rel,MSTP,Sylk,24VA/VD

Honeywell Unitary Controllers provide flexible, freely programmable, demand-led control that delivers tangible benefits to reduce energy spending while driving new levels of functionality and efficiency in today’s buildings.

Features and Highlights

• UIOs configurable as analog input, binary input, and analog output
• Sylk™ two-wire polarity insensitive interface connects to Honeywell Sylk™ wall modules without hardware I/O.
• Engineering tools including function block library and sample application templates ensuring a consistent experience from the room, plant controllers, and supervisor.
• Easy to install into fusebox (DIN43880) or on DIN rail, surface mount
• Honeywell T1L devices support daisy chains with distances between devices of up to 984 ft. (300 m), way above the 328 ft. (100 m) limit of standard RJ45 ethernet and allowing greater wiring lengths.

Integrated Actuator Specifications

Specifications

Hardware

Parameter	Specification
CPU	Crossover processor NXP I.MRT, Cortex M7
Memory capacity	16 MB QSPI Flash, 16 MB SDRAM
Ethernet	BACnet™ IP: 2 × RJ‑45 Ethernet ports with loop topology protection (RSTP supported).
Real Time Clock	24 hours backup after power failure; resets to factory default after 24h until BACnet™ Time Sync.
Small LEDs	Communication signal (green).
Large LEDs	Controller status (green, yellow, red).

Electrical

Parameter	Specification
Rated Input Voltage	20–30 VAC / 24–30 VDC
Nominal Power Consumption	BACnet™ IP/MS/TP/T1L: 8 VA
Full Load Power Consumption	BACnet™ IP/MS/TP/T1L: 30 VA
Frequency Range	50–60 Hz
Auxiliary Power Output	Large: 1 × 24 VAC/VDC @ 300 mA; 3 × 24 VAC/VDC @ 75 mA. Small: 1 × 24 VAC/VDC @ 300 mA; 1 × 24 VAC/VDC @ 75 mA.
Impulse Voltage	330 VAC

Operational Environment

Parameter	Specification
Storage Temperature	−40 °F to 150 °F (−40 °C to 66 °C)
Operating Temperature	−40 °F to 122 °F (−40 °C to 50 °C)
Humidity	5–95% RH, non‑condensing
Protection	IP20, NEMA 1
Pollution Level	2

Supported Devices

Device Type	Models
Sylk™ wall modules	TR42, TR42‑H, TR42‑CO2, TR71, TR75, TR120 (emulation mode only), etc.
Sylk™ sensors	TR40, TR40‑H, TR40‑CO2, TR50 (emulation mode only), C7400S
Sylk™ actuators	MS3103, MS3105, MS3110, MS3120
Non-Sylk™ actuators	MS4103, MS4105, MS7403, MS7503, MS8103, MS8105
Hardwired wall modules	T7460 A–F, T7770 A–G
Modbus devices	Any Modbus RTU devices, including Honeywell DALI64MODPSUF/S, TR50, TR80

Solid State Relay (SSR)

Max 24 VAC/VDC. 1.5 A constant; 3.5 A inrush for 0.1s per SSR output. Shared jumper supply. Fuse 5 A (examples: 0AGC005.V, BK/AGW-5).

Relays

Up to 277 VAC / 230 VAC (+20%). 3 contacts per relay (NO, NC, common). 10 A constant on NO, 100 A inrush for 100 ms. Total current limited to 12 A. Fuse 12.5 A (examples: 021812.5MXEP). Outputs usable as dry contact.

Universal IO

Parameter	Specification
AI	16-bit A/D; 0–10 VDC or 0–20 mA; supports multiple sensor types and wall modules.
BI	Dry contact input; pulse input up to 100 Hz; compatible with SO interface.
AO	Voltage output 0–11 VDC; current output 0–20 mA; LED control.
DO	0/10 VDC at 20 mA binary output.

Communication

Parameter	Specification
Protocols	BACnet™ IP (RJ45, T1L), BACnet™ MS/TP, Modbus RTU
IP Addressing	Dynamic: DHCP, Link-local; Static: Assigned
Sylk™	2-wire, polarity-insensitive
Note *** Auto baud detection for BACnet™ MS/TP controllers

T1L Communication

Parameter	Specification
10BASE‑T1L Standard	802.3cg‑2019
Connection	Screw terminal, auto MDI‑X
Cable type	Single twisted pair, 18 AWG, shielded or unshielded. Belden 74040NH, 9841NH or equivalent.
Distance	Max 984 ft (300 m) to Honeywell T1L controller in daisy chain; max 2,952 ft (900 m) to other T1L device without daisy chain.
Transmission rate	10 Mbps

Downloads

Product Data Sheet