Allen-Bradley 1756-IF16IH 16-Channel HART Input Module

The Allen-Bradley 1756-IF16IH is a 16-channel isolated current-input module for ControlLogix systems that provides HART-compatible measurements from field transmitters. Each of its 16 channels accepts a current signal in the 0-20 mA range (with 4-20 mA operation), and the module includes a separate HART modem on every channel for two-way digital communication with HART-enabled devices. The inputs are galvanically isolated from the backplane and from each other, helping protect the controller and reduce signal interference in challenging industrial environments. Designed for installation in a 1756 I/O chassis, it integrates with Rockwell Automation's ControlLogix I/O infrastructure and supports typical process applications such as reading transmitter outputs, monitoring loop status, and performing device diagnostics via HART while the controller captures the actual current values. Key specifications include 16 isolated current inputs, 0-20 mA (4-20 mA) range, and per-channel HART modulation, making it well-suited for plant instrumentation in process industries that rely on HART field devices.