Allen-Bradley 852S-NSA Timer Module

Allen-Bradley 852S-NSA Timer Module is a solid-state timing relay in the 852S family, built for plug-in use with older Bulletin 852S timers and compatible Bulletin 700-N relay assemblies. It can function as a stand-alone timer or be mounted on a 2- to 4-pole Bulletin 700-N relay, consolidating timing control in compact panels. The NSA variant provides a maximum timing duration of 30 seconds, making it suitable for short-delay sequencing, interlocks, and basic process timing in vintage Rockwell Automation systems. The unit supports ON-delay timing operation, with an option to convert to OFF-Delay mode, enabling flexible timing behavior to suit different control schemes. As a solid-state solution, it offers repeatable timing performance and solid-state reliability under typical industrial conditions. Applications include controlling feeders, conveyors, start/stop sequencing, interlocks, and other timing tasks within legacy Allen-Bradley automation installations. The 852S-NSA is designed for compatibility with the broader 852S timing relay family and is commonly found in retrofit or maintenance scenarios where Bulletin 852S timers are still in service.