Allen-Bradley 1756-OF4 Analog Output Module ControlLogix

Allen-Bradley 1756-OF4 is a four-channel, non-isolated analog output module for ControlLogix systems that can deliver either voltage or current signals per channel. The module uses a 20-pin interface and occupies a single slot in a ControlLogix I/O rack, offering four independent A/O outputs that share a common return path. In Rockwell's software, you configure each channel to operate as voltage or current output, allowing flexible integration with a wide range of field devices such as actuators, valves, and analog sensors. As part of the ControlLogix family, the 1756-OF4 works alongside other analog and digital I/O modules in synchronized control schemes, making it suitable for process control, automation, and instrumentation applications that require multi-channel, real-time analog signaling. Typical wiring examples include a shared return line for all channels and separate signal paths for each channel to minimize noise and cross-talk, especially in distributed I/O installations.