Testing RS485 to RS232 adapter

You will need 2 RS-485 interfaces to test this so it is best to connect the adapter RS-485 side to I/O-485-3 of a 2DS2S card. Just connect “+” to “+”, “-“ to “-“, and “ground” to “ground”. Connect the RS-232 side of the adapter to your PC’s comm port and open TeraTerm to this comm port.