Automated Logic U551AK BACnet MS TP Controller

Automated Logic U551AK BACnet MS/TP Controller is a compact control module designed for low-end, high-volume terminal control applications, such as heat pumps and fan-coil systems, and it communicates natively on BACnet MS/TP to integrate with WebCTRL and other BACnet networks. The unit provides five digital outputs for actuating devices, two LogiStat inputs for sensors or status feedback, three general-purpose inputs, and a single analog output for variable-speed or analog control. This configuration supports straightforward local control with BACnet visibility of points and status, enabling seamless monitoring and control within a building management system. Using an MS/TP (RS-485) interface, it can be wired into an existing BACnet MS/TP subnetwork without requiring IP networking, making it a practical choice for upgrading or expanding terminal-unit control in small-to-mid-sized installations. Typical applications include controlling heat pumps, fan-coil units, and other terminal devices where reliable BACnet MS/TP communication and direct actuator/sensor I/O are needed. BACnet MS/TP interface provides standard BACnet point visibility to the building management system.