Allen-Bradley 1756-IA32 32-Point Input Module

The Allen-Bradley 1756-IA32 is a ControlLogix AC digital input module offering 32 points, arranged as two banks of 16, with a 36-pin terminal block (36P) for field connections. It accepts 74–132 VAC signals at 47–63 Hz, with an input impedance of 14 kΩ at 132 V AC, and supports on-state current of 5 mA minimum at 74 V up to 15 mA maximum at 132 V, while off-state current is up to 2.5 mA and off-state voltage up to 20 V. Timing characteristics include a hardware delay of 1.5 ms nominal (maximum ~10 ms) from input to backplane, with user-selectable filter times of 1 ms or 2 ms for OFF-to-ON, and 9 ms or 18 ms for ON-to-OFF. The module draws about 165 mA at 5.1 V and 2 mA at 24 V for its internal circuitry, backplane power is 0.9 W, and maximum power dissipation is 6.1 W at 60 °C, and it provides input/communication status and module health indicators for field diagnostics.