Need more information?
Honeywell UN-RL1644ESB230NMC
Optimizer Unitary Controller with Ethernet Interface, Niagara Device
Product Description
Optimizing Performance with Advanced Features
The Optimizer Unitary Controller is a powerful Niagara device designed to enhance the efficiency of your building's automation system. With its 1 Ethernet interface (RJ45, BACnet™ IP), this controller supports peer-to-peer communication for seamless data exchange between controllers.
Its multi-protocol compatibility ensures fast and secure integration with various building systems. The device features 16 universal inputs/outputs (UIO) that can be configured as analog inputs, binary inputs, or analog outputs for maximum flexibility.
The controller is equipped with 4 relay outputs designed for high inrush current applications in HVAC control and 4 chopper digital outputs (DO CHP) providing enhanced switching capabilities for diverse control applications.
Connecting directly to Honeywell Sylk™ wall modules via the Sylk™ Bus Interface simplifies installation. The device also supports Modbus RTU for integration with third-party devices over serial communication and is based on Niagara 4 for unified programming and management within the building automation system.
The built-in Bluetooth Low Energy (BLE) enables wireless connectivity for simplified commissioning and diagnostics. The larger enclosure design provides additional space for wiring, while flexible mounting options include DIN rail, surface mounting, or enclosure installation.
With a built-in web server featuring an HTML5 interface, this controller offers remote access and graphical...
Need more information?
Offer details
- Offer from:
Trusted supplier — Poland, member since 2023, 5–9 employees
- Availability:
- On requestLead time: 4–5 days
- Warranty:
- 24 months
- Condition:
- New Factory Sealed
Specifications
- Brand
- Honeywell
Available Offers
(1)| Condition | Availability | Supplier | Warranty | Action | |
|---|---|---|---|---|---|
![]() | Condition New Factory Sealed | Availability On requestLead time: 4–5 days | Supplier | Warranty 24 months |
Offer with manufacturer lead time
Directly from the manufacturer - with a confirmed, predictable, and fully transparent delivery time.
Documents
Data Sheet
Datasheet for Honeywell UN-RL1644ESB230NMC, including specifications and features.
CAD Models
3D CAD model and technical drawings, ready for your design software.
Product data updated: 16-09-2026

Market insights for UN-RL1644ESB230NMC
Get real-time analytics and market data for UN-RL1644ESB230NMC and similar products to optimize your purchasing decisions
- Real-time stock availability data from 700 MRO distributors in Europe and USA
- Price analysis by condition (new, used, refurbished) with market median prices
- Critical component availability monitoring to prevent production downtime

