Allen-Bradley 852S-NSB Solid State Timer

The Allen-Bradley 852S-NSB Solid State Timer is a solid-state timing unit designed to mount on Bulletin 700-N relays, delivering a precise 0.5–30 second on-delay in a compact module. As part of the 852S family, the NSB variant uses semiconductor timing circuitry (no moving parts) to provide a controlled delay after input activation and to regulate downstream outputs in industrial control circuits. This timing module is intended for front-end timing in automation, enabling quick integration with existing 700-N relay bases and a straightforward adjustment window within 0.5–30 seconds. The device supports repeatable, vibration-resistant timing performance for short delay applications such as sequencing, interlocking, and timed enablement in machine controls. Although exact electrical interface details depend on the mounting base, the 852S-NSB is commonly deployed where a compact, reliable on-delay timer is preferred over mechanical timers.