The POL824.40/STD room unit can be integrated into a Climatix controller system through onboard RS485 port or even Modbus over service. Terminal resistor is activated as default. When integrating to Modbus system, it is required to check whether resistor needs to be activated or not.
The peripheral bus can only be used for firmware updating. In this case, make sure the baud rate is set to 38400 at even parity.
A max. of 5 room units can be connected on controller and all room units should connect to the same RS485 port for communication and upgrade (Configured in controller application, for upgrade details, see "Upgrade of HMI firmware" in Basic documentation).
Note
- The room units can be powered (AC/DC 24 V) via controller or external power supply.
- The outlet power capacity of controller should be higher than total power consumption of the connected room units. Otherwise, an external power supply is recommended.
- Only shielded twisted pair cables are used for Modbus communication.
- All RS485 ports can support firmware upgrade, but it depends on the application loaded into Climatix controller (specific Update Block is needed).