Allen-Bradley 1746-OA16 SLC 500 Triac Output Module

Allen-Bradley 1746-OA16 is a 16-channel AC output module for the SLC 500 controller family that uses triac switches to control mains-voltage loads. Each of the 16 outputs switches 240 V AC and is rated for up to 500 mA per channel, making it suitable for low-to-moderate current loads such as solenoids, relays, lighting, indicators, and other 240 V devices in industrial panels. The OA16 mounts in an SLC 500 rack on a 1746 backplane and receives control signals from a compatible SLC 500 CPU to energize or de-energize individual outputs according to ladder logic. With 16 discrete AC outputs, the module provides a compact interface for expanding a controller’s load-control capability without replacing the CPU. Common applications include machine lighting control, accessory solenoids, and other 240 V loads in manufacturing or process environments where a single-slot solution is advantageous. The 1746-OA16 designation is consistently described in Rockwell Automation literature and distributor catalogs as a 16-channel, 240 V AC triac output module for the SLC 500 family.