Allen-Bradley 1756-OF4 4-Point DC Output Module

The Allen-Bradley 1756-OF4 is a ControlLogix four-channel DC analog output module that plugs into a 1756 backplane to provide four DC outputs for driving analog devices. This module supports either voltage or current output modes, enabling direct control of actuators such as valve positioners, motor controllers, and other analog loads from a Rockwell Automation controller. Each of the four outputs is presented on a 20-pin terminal interface and is managed through the ControlLogix I/O chassis, making wiring straightforward in standard racks. As part of the non-isolated analog output family, the 1756-OF4 integrates with Studio 5000/RSLogix projects for software-based range selection and scaling of the output signals. Typical use cases include process control loops, batch automation, and equipment automation where precise, real-time DC signals are required. The module adheres to Rockwell’s ControlLogix I/O conventions and shares common configuration and diagnostics with other 1756 analog modules, enabling consistent programming, testing, and replacement within existing ControlLogix ecosystems.