NX-PF0730 Current Con-
sumption
= (Current consumption from I/O power supply)
= 10 mA
NX-ID3317 Current Con-
sumption
= (Current consumption from I/O power supply) + (Input current × Num-
ber of inputs used)
+ (Total current consumption of connected input devices)
= 0 mA + (6 mA x 4 points) + (50 mA x 4 points)
= 224 mA
NX-OD3121 Current Con-
sumption
= (Current consumption from I/O power supply) + (Total load current of
connected loads)
+ (Total current consumption of connected output devices)
= 10 mA + (125 mA x 4 points) + (50 mA x 4 points)
= 710 mA
The required power supply capacity for the I/O power supply is calculated as follows.
Power supply capacity of I/O
power supply
= (Current consumed by NX-PF0730) + (Current consumed by NX-
ID3317)
+ (Current consumed by NX-OD3121)
= 10 mA + 224 mA + 710 mA
= 944 mA
4 Installation and Wiring
4-37
NX-series System Units User's Manual (W523)
4-6 Wiring the Additional Power Supply Units
4
4-6-2 Wiring the Additional I/O Power Supply Unit
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