OMEGA AIR RDHP 20, Installation And Operating Manual

Page: 14 / 37

5.4.1 Electric scheme RDC 2
The controller has 3 outputs (230 V), for compressor, fan and drain. The other outputs are for alarm.
The alarm is triggered via opto triac, which can handle 600VAC/50mA.
Controller can also be turned OFF/ON via In. Remote by changing the parameter 13 (Remote control)
from 0 to 1. When the circuit is connected, the controller goes to OFF state, when the circuit is
disconnected, the controller is in ON state. (See the attached scheme above).
For the MODBUS communication, the twisted pair cable needs to be screwed to the A and B terminals.
To communicate with the PC, an adapter is needed. The address for the MODBUS communication is 1.