Allen-Bradley 852S-NSA Solid State Timing Module

The Allen-Bradley 852S-NSA Solid State Timing Module is a compact on-delays timer designed to mount on Bulletin 852S relays and deliver precise, solid-state timing for control circuits up to 300 VAC. It accepts 110 VAC at 50 Hz or 120 VAC at 60 Hz input, and the NSA variant provides a timing interval in the range of 0.1 to 5.0 seconds (the maximum time is fixed by component characteristics and may be up to 70% greater than listed). The module’s output is a NEMA B300 sealed contact rated for up to 300 VAC, enabling mains-level switching in industrial panels, and it is intended for mounting on Type N relays as part of the 852S family; it is supplied as an on-delay device but can be configured for off-delay operation with appropriate wiring. Dimensions are approximately 2.2 in wide × 4.0 in high × 6.0 in deep, and it weighs about 2 lb 1.8 oz (≈1.0 kg). This model is part of a trio in the 852S solid-state timing lineup (NSA, NSB, NSC) offering maximum times of 5, 30, and 60 seconds respectively, reflecting Rockwell Automation’s Bulletin 852S design intentions for compact, reliable timing in control circuits.