Warning! Do not connect RS-422/485 devices until the IP address is configured and an appropriate port interface type has been configured. The default port setting is RS-232. 

1.       Configure the DeviceMaster as follows. Don’t forget to save! Port 1 is shown, but either port can be RS485.

2.       Wire up the DeviceMaster to RS485 device 

3. Wire up using only Txd , RTS and Signal gnd.