Panasonic GTWIN Reference Manual page 255

Connecting the GT to a PLC
PLC communication cable: Mini-DIN 5-pin loose-wire cable (AIGT8142)
Connecting to the FP-X/FP/FP0(R)/FP-e TOOL port

The cable should not exceed 3m.

When connecting to a PLC with all expansion slots used, prepare an
external 5V DC power supply for the GT due to current consumption limits.
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GTWIN Reference Manual