Allen-Bradley 1794-IA16 FLEX IO AC Input Module

Allen-Bradley 1794-IA16 FLEX I/O AC Digital Input Module is a 16-channel input card for the FLEX I/O distributed I/O system, designed to monitor 120 V AC devices. The module provides 16 nonisolated digital inputs wired through dedicated C-terminals for each input's AC line, enabling simple common-return wiring in standard 120 V AC sensing circuits. It accepts an input range of 74 to 132 V AC and draws a nominal 12 mA per input at 120 V AC, making it suitable for typical industrial switches, sensors, and relays wired to a 120 V AC supply. As part of the FLEX I/O family, the 1794-IA16 plugs into a FLEX I/O rack and reports input status over the FLEX backplane to compatible controllers such as ControlLogix and CompactLogix, enabling scalable expansion of 120 V AC sensing networks. Use cases include machine doors, safety interlocks, pushbuttons, and other field wiring that require reliable AC-input signaling in automation systems. This module’s 16-channel density and straightforward wiring make it a common choice for converting a collection of 120 V AC devices into a cohesive I/O network within a FLEX I/O installation.