The Omron digital input unit has rated input voltage of 20.4 to 26.4 VDC .It has input impedance 5.6 kΩ with input current 4.1 mA typical at 24 VDC.
Insulation resistance 20 MΩ minimum between external terminals and the GR terminal (100 VDC) Dielectric strength 1,000 VAC between the external terminals and the GR terminal for 1 minute at a leakage current of 10 mA maximum. Internal current consumption
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