BACnet (Building Automation Control Network) is a standardized, manufacturer-independent communication protocol for building automation. Areas of application include HVAC, lighting control, safety and fire alarm technology.

The CX8191 is a compact DIN rail-mountable Ethernet control system with an ARM Cortex™-A9, 800 MHz CPU. The BACnet or OPC UA protocols can be operated via the switched Ethernet fieldbus interface. Alternatively, K-bus or E-bus terminals can be series-connected; the CX automatically detects which system is connected during the start-up phase. The controller is programmed with TwinCAT 3 via the Ethernet interface.

In conjunction with the BACnet-MS/TP terminal EL6861, the CX8191 can also act as a router to MS/TP networks. Several MS/TP networks are possible. Moreover, additional protocols and services such as OPC UA, MQTT or Modbus TCP/RTU can be operated. The CX8191 is therefore an almost universal device that can be used very flexibly from control tasks to gateway functions.

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