The Schmersal SRB-E-402FWS-TS safety-monitoring module has a glass-fibred reinforced thermoplastic, ventilated enclosure material. The material of the electrical contacts is Ag-Ni, self-cleaning, positive drive. It snaps onto standard DIN rail to EN 60715. It has screw connection, plug-in terminal connector which is rigid or flexible.

2 Signalling outputs
2-channel time monitoring
2-channel safety door monitoring
2 Safety contacts, 2 Safety Output
Detects standstill using 1 or 2 impulse sensors
additional standstill signal, e.g. PLC as second
input channel