Mitsubishi GOT1000 Series Connection Manual page 812

(b) In the case of the GT11
19 - 82
19.6 Preparatory Procedures for Monitoring
19.6.5 Attaching communication unit and connecting cable
When using the RS-422 conversion unit
On "Communication settings" on the utility, make setting so that 5V DC power is
supplied to the RS-422 conversion unit from the RS-232 interface on the GOT.
For details on the utility, refer to the following manual:
GT User's Manual
1 Touch [5V supply].
2 Set [5V power supply] to "YES".
1 Connect the RS-422 cable to the RS-422
interface on the GOT.