Allen-Bradley 1746-IB16 16-Point DC Input Module

The Allen-Bradley 1746-IB16 is a 16-point DC input module for the SLC 500 PLC family that acquires discrete 24 VDC field signals and interfaces them with the controller. It provides 16 input points, is compatible with sinking and sourcing devices, and uses screw-terminal field wiring. It mounts in an SLC 500 rack slot and is designed for industrial environments, with individual input status LEDs, a typical response time for industrial logic, and transient suppression protection (platform dependent). It supports 24 VDC inputs from proximity sensors, limit switches, and pushbuttons, enabling status reporting to PLC logic. Common replacements include 1746-IT4I (isolated input variant), 1734-IB16 (Flex I/O input module), and Siemens 6ES7321-7BH01-0AB0 (SM321 input module). Operating temperature falls within the industrial range.