Allen-Bradley 1756-IA16 16-Point Input Module

The Allen-Bradley 1756-IA16 is a 16-point AC digital input module for ControlLogix systems that accepts 74–132 V AC field signals (47–63 Hz) and uses a 20-pin removable terminal block for wiring. Mounted in a compatible 1756 I/O chassis, it provides 16 discrete inputs suitable for monitoring 120 V AC sensors, switches, and relays in industrial automation networks. Key electrical characteristics include a backplane power dissipation of 0.58 W, an off-state voltage rating up to 20 V, off-state current up to 2.5 mA, and an on-state current range of 5–13 mA at 74–132 VAC, with input transition delays up to 10 ms (off-to-on) and 8 ms (on-to-off) and an inrush current capped at 250 mA. The module draws about 100 mA at 5.1 V for its logic and roughly 2 mA at 24 V, helping to clarify its power budget within the ControlLogix backplane.