Power Consumption for PLC Input Signals

The specifications sheets for PLC Power Consumption on my desk have these :

for an AC voltage digital input:

2 mA nominal @ 230 VAC, 50 Hz

for a DC voltage digital input:

2.3 mA @ 12 VDC
6.9 mA @ 24 VDC nominal

for a dry contact digital input (internal 15Vdc source):

2.6 mA nominal

Interviewees should be able to convert from milliamps to amps.

Normally, power (watts) is ‘consumed’.
Current (amps) is a ‘draw’ on the power supply.

Author - Carl Ellis

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