Allen-Bradley 1771-OD Isolated AC Output Module

The Allen-Bradley 1771-OD is a six-point isolated AC output module for PLC-5 systems, delivering six independent 120V AC output channels on a single backplane-friendly module. As an isolated output device, it provides electrical isolation between each output channel and the backplane, helping to protect the PLC-5 controller from load transients and noise while enabling reliable control of 120V AC loads. Intended uses include switching AC coils, relays, and motor starters in industrial control panels, with documented behavior indicating an output can drive a Size 5 motor, illustrating its suitability for medium-duty 120V AC control in PLC-5 configurations.