Panasonic GM1 Series Reference Manual page 93

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Internal circuit diagram of the 64-point digital I/O unit (sink type)
Input section (32 points)
Output section (32 points)
● The COM terminals of the input section are connected within the unit.
● All positive terminals and negative terminals of the output section are connected within the
unit. Connect them externally as well.
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Limitations on the load current of the 64-point digital I/O unit (sink type)
The load current is limited as shown in the following figure depending on the voltage of the
external power supply.
WUME-GM1H-01
12.3 Specifications of Expansion Units
12-11