Allen-Bradley 1756-IA16 16-Channel DC Input Module

The Allen-Bradley 1756-IA16 is a 16-channel, 79–132 V AC input module for ControlLogix systems, designed to bring 16 field signals into a single module. It mounts in a ControlLogix rack and communicates with the processor through the standard 1756 backplane, wired to a 20-pin remote terminal block (RTB) for field connections. Each of the 16 inputs is intended for AC signals within the 79–132 VAC range, making it suitable for sensing common 120 VAC industrial sensors, switches, and other AC-powered devices. Typical applications include machine automation, process control, and safety interlocks where multiple AC-level digital inputs must be consolidated in a compact I/O solution. The module is cataloged as 1756-IA16 and is part of the ControlLogix I/O family, offering 16 discrete input points with field wiring organized on a single module for straightforward installation. If a DC-input alternative is required, Allen-Bradley offers DC-input options in the same 1756 family, such as the 1756-IB16 (10–30 V DC, 16-point input module), which is compatible with ControlLogix systems but uses DC signaling instead of AC. Always verify the input type and voltage requirements to match your specific sensing devices and safety standards.