1771-IMD/B | Allen-Bradley | PLC 5 Digital AC/DC Input Module

Description

The Allen-Bradley 1771-IMD/B is a PLC 5 Digital AC/DC Input Module designed to convert AC/DC signals from user equipment into logic levels compatible with PLC processors, directly controlling the status of corresponding bits in the PLC data table. It features 32 input channels organized into 4 groups of 8 channels, supporting a 120V AC/DC voltage class, with an operating voltage range of 85-138V AC/DC. The module draws a backplane current of 280 milliamps, with typical signal delay of 20ms (±15ms) for AC signals and 2ms (±3ms) for non-AC signals. As an A-series module, it supports 1/1771 and 32-slot I/O addressing, and integrates a 1771-WN wiring arm that allows module replacement without disconnecting field wiring, reducing downtime. Its modular design enables space-efficient expansion of PLC control systems, and it is compatible with a range of on/off sensors and actuators including buttons, limit switches, pilot lights, motor starters, and signalers, making it suitable for industrial automation applications requiring reliable digital signal input processing.