The BC9191 room controller integrates various automation functions in a single module, representing a compact and efficient solution in the price-sensitive area of room control. Pre-installed standard functionalities cover all necessary functions for room control, simplifying commissioning: extensions or changes to the room automation functions are possible in the TwinCAT development environment and save on the complex re-wiring that would normally be the case with wired controllers.
With 128 kbyte of memory, the BC9191-0100 offers extended memory capacity compared to the BC9191-0000. This enables the creation of more complex user programs, including the use of TwinCAT software libraries for Modbus RTU or serial communication. Communication with the room control units takes place predominantly via the Modbus RTU protocol. However, devices with freely definable serial protocols such as room control units or weather stations can also be connected via the RS485 interface.
Furthermore, an increase in performance has also been achieved in comparison with the BC9191-0000. Existing programs are executed faster and the cycle times of extended programs are not lengthened, so that faster reaction times for signals and communication are achieved.
The BC9191 has two switched Ethernet interfaces for integration into the higher-level Ethernet network and integrates three digital inputs, e.g. for the integration of window contacts or occupancy sensors. The sensor system for CO2 content/air quality or for brightness can be connected via three analog 0 – 10 V inputs. Temperature measurement takes place via a PT/Ni1000 input and is supplemented by resistance measurement for setting the setpoint value. Six relay or TRIAC outputs, 230 V AC, can control an air heater, a 3-stage fan or the heating or cooling valves, for example. Two analog 0 – 10 V outputs can be used to control volumetric air flow or similar functions.
For the realization of further functionalities, the BC9191 room controller is optionally expandable via the K-bus interface by the entire range of standard Bus Terminals and the sub-bus systems relevant for building automation, such as EnOcean, LON, EIB/KNX, DALI and M-bus.
With the new BC9191-0100 room controller, Beckhoff is extending its range of compact devices for room automation with a powerful variant for the execution of larger application programs. The controller has an integrated PLC as well as the sensor/actuator interfaces required for room control. It additionally integrates an RS485 sub-interface in order, for example, to connect room control devices, weather stations or electric door openers via serial protocols such as Modbus RTU.