Allen-Bradley 1794-1B16 Flex I/O Input Module

Allen-Bradley 1794-1B16 Flex I/O Input Module is a 24 VDC digital input card for the FLEX I/O system, delivering 16 discrete sink inputs in a compact form factor. It plugs into a FLEX I/O backplane and communicates with Rockwell Automation controllers through the FLEX bus, providing scalable remote I/O for small to mid-size automation applications. Each of the module's 16 channels expects a 24 VDC input signal from field devices such as pushbuttons, limit switches, or proximity sensors, with inputs configured as sinking (active when driven toward the common). The 1794-1B16/1794-IB16 designation denotes a 16-channel input module in the FLEX family, commonly deployed where multiple sensors must report binary states to a PLC. When paired with a compatible controller and rack, it enables straightforward wiring, a consistent 24 V sensing level across all inputs, and easy expansion by mixing with other FLEX I/O modules in the same rack for digital and analog I/O. This module is one of the standard 24 VDC FLEX I/O input options offered by Allen-Bradley, optimized for reliable, modular remote I/O in automation systems.