Allen-Bradley 1746-OB16E 16-Point Output Module

Allen-Bradley 1746-OB16E is a 16-point DC output module for the SLC 500 family that provides isolated, electronically protected DC sourcing outputs. Designed to energize 24V DC field devices, it accepts a 10–30V DC source and delivers current to 16 outputs through a 1746 backplane in a compatible SLC 500 chassis. The “E” designation identifies it as electronically protected, with per-point protection against short circuits and overloads to help safeguard the module and controller system. Each of the 16 outputs is rated for up to 1.0 A at 30°C (86°F), with a derating to 0.5 A at 60°C (140°F), making it suitable for driving coils on relays, small solenoids, and pilot lamps without external protection circuitry. The OB16E is a sourcing module, meaning its outputs source current to the connected loads from the 24V DC supply, and its channels are individually isolated from one another to minimize fault propagation. This configuration is commonly used in legacy Allen-Bradley automation projects to expand discrete control of 24V devices while maintaining clear channel isolation and straightforward wiring for SOLENOIDS, RELAYS, and indicator loads.