Allen-Bradley 1756-OF8H 8-Ch HART Analog Output Module

The Allen-Bradley 1756-OF8H is an eight-channel HART-enabled analog output module for Rockwell Automation's ControlLogix system, designed to mount in a 1756 I/O backplane and provide eight A/O outputs from a single module. Each channel can be configured to operate as either a current or a voltage output, and the module includes an integrated HART modem for two-way communication with HART field devices such as transmitters, enabling on-device configuration and diagnostics without separate adapters. Performance specifications include an analog update path with a minimum around 12 ms, and HART communications on enabled channels typically take about 1 second per channel, depending on device and configuration. The unit uses a 20-pin terminal block for wiring and is powered from the ControlLogix backplane, fitting in a standard 1756 I/O rack and supporting centralized configuration through Rockwell Software tools for process-control and instrumentation applications that require direct control and monitoring of HART-enabled transmitters.