Allen-Bradley 1746-OB16E SLC 500 DC Output Module

The Allen-Bradley 1746-OB16E is a 16-channel 24 V DC output module for the SLC 500 family that provides sourcing (positive) outputs to drive DC field devices from a 24 V supply. It wires through a removable terminal block (RTB) and installs in a 1746-series rack, making it a drop-in I/O option for 1746 controllers. The “E” designation denotes electronic protection with current fold-back on each channel, delivering short-circuit and overload protection to help safeguard both the module and connected loads. This variant is designed for Series 1 SLC 500 hardware and offers isolation between field circuits and the controller, typically rated to meet standard industrial I/O isolation practices. Common applications include energizing coils, relays, solenoids, and indicator devices in automation and manufacturing environments where reliable, distributed DC actuation is required. Key specifications include 16 identical 24 V DC outputs, sourcing configuration, RTB wiring, and compatibility with 1746 chassis, enabling straightforward integration into existing SLC 500 control systems.