The C4IDCK is a digital input module designed for AC/DC voltage detection and signal conditioning in industrial control systems. It accepts input voltages in the 10-32 VDC range with a maximum input current of 20 mA and features a 2 kO input resistance. The module provides galvanic isolation with 4000 Vrms input/output isolation voltage and operates over a temperature range of -30°C to 80°C. The output stage supports logic supply voltages from 4.5 to 30 VDC with a maximum output current of 50 mA and turn-on/turn-off times of 5 milliseconds. This module is commonly used in programmable logic controllers (PLCs), industrial automation systems, and distributed I/O applications where reliable digital signal detection and isolation are required.