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The Allen-Bradley 1771-IMD is a robust digital AC/DC input module offering sixteen inputs, ideally suited for systems requiring a nominal voltage of 220V DC or AC at 50-60 Hz. This module efficiently manages on-state and off-state transitions with an input delay of 15 ms from OFF to ON and 172 ms from ON to OFF, while maintaining an input impedance featuring a 0.15 µF capacitor and a series of resistors for optimal performance. Operating between 32-140 degrees Fahrenheit, it exhibits a power dissipation ranging from 1.3 W to 5.8 W and a thermal dissipation between 4.5 and 19.8 BTU/hr, while maintaining backplane current at 250 mA at 5V DC.