Mitsubishi GOT1000 Series Connection Manual page 1182

30.3.5 Attaching communication unit and connecting cable
1 How to connect the cable
Using the RS-232 and RS-422 interfaces alternately, connect the GOTs (connection in series).
(The USB interface is not usable for the multiple-GT11 connection.)
Up to two GOTs can be connected.
(1) How to connect the RS-232 cable
(2) How to connect the RS-422 cable
30 - 12
30.3 Preparatory Procedures for Monitoring
30.3.5 Attaching communication unit and connecting cable
Cautions when attaching the communication unit and connecting the cable
Shut off all phases of the GOT power supply before attaching the communication
unit and connecting the cable.
1 Connect the RS-232 cable to the RS-232
interface on the GOT.
2 Connect the RS-422 cable to the RS-422
conversion unit.