Schmersal FWS1205B Sensor Monitor

The Schmersal FWS 1205 B is a fail-safe standstill monitor that detects drive standstill by monitoring two impulse sensors and then drives two safety contacts and two signaling outputs to safely halt or control motion. It provides wire‑break detection, automatic reset, and a reset after loss of supply, plus earth‑fault detection and a built‑in status LED (one LED) to indicate fault or standstill. The unit’s ventilated housing is made from glass‑fiber reinforced thermoplastic, and the package weighs about 195 g. It carries cULus certification and conforms to EN IEC 62061, EN ISO 13849‑1, EN IEC 60947‑5‑1, EN IEC 60947‑5‑3, EN IEC 60947‑5‑5, EN IEC 60204‑1, and EN IEC 60947‑1; it is listed with Schmersal part number 101170054 and EAN 4030661297163, and was shown as deliverable until December 31, 2024. For compatibility, Schmersal notes it can be used with IFL‑series p‑type inductive proximity sensors.