The Beckhoff BC9191-0100 Building Automation room controller delivers reliable, scalable control for HVAC room applications, combining a compact PLC with integrated I/O and Ethernet networking. Ideal for fan-coil units, VAV and room climate control, it consolidates sensors and actuators in a single DIN-rail device to streamline building automation projects and reduce commissioning time.

With dual switched Ethernet ports (2 x RJ45) supporting TwinCAT ADS and Modbus TCP, the BC9191-0100 integrates smoothly with BMS and third-party systems. Local I/O includes 3 digital inputs for contacts, 3 analog inputs 0…10 V, 1 PT/Ni1000 input (−20…+60 °C), 1 resistance input 0…10 kΩ, 1 LED output, 1 relay 230 V AC/10 A, 3 relays 230 V AC/1 A for 3-stage fans, 2 triac outputs 230 V AC/1 A for valves, and 2 analog outputs 0…10 V. Programming via TwinCAT 2 over Ethernet with IEC 61131-3 languages, online change, 128 kB program and 128 kB data memory, plus support for up to 64 Bus Terminals and 512 bytes fieldbus I/O, ensures flexible engineering. The controller is designed for 35 mm DIN-rail mounting, IP20, and 0…55 °C operation.

Engineered for dependable room automation, this controller reduces panel space and installation time with its compact housing and plug-in spring terminals, while open protocols simplify integration and lifecycle service—backed by a 1-year warranty for added peace of mind.

• Brand: Beckhoff
• Series: BC series
• Model: BC9191-0100
• Communication protocols: TwinCAT ADS, Modbus TCP
• Ethernet interface: 2 x RJ45 (switched)
• Sub-bus: RS485
• Supply voltage: 230 V AC
• Protection rating: IP20