Allen-Bradley 1746-IG16 PLC Module

Allen-Bradley 1746-IG16 is a SLC 500 16-channel digital input module that provides TTL-compatible 5 V DC input signals in a sourcing configuration for Allen-Bradley SLC 500 controllers. The module delivers 16 discrete TTL/BCD input channels to the PLC, allowing the controller to read each input as a logic high or low. Designed for use with SLC 500 systems, it is typically wired to 5 V DC source signals from sensors and switches such as pushbuttons, limit switches, and proximity sensors, enabling reliable monitoring of digital conditions in automation lines and machine controls. The 1746-IG16’s TTL inputs support sourcing operation, feeding the controller with timely discrete state information via the backplane within a Rockwell Automation discrete I/O topology. As part of the 1746 family, the IG16 provides scalable input capacity when paired with other 1746 modules in the same rack, supporting varied automation applications that require fast, 5 V logic-level sensing in legacy Rockwell PLC configurations.