Schmersal SRB301LC/B-24V Safety Relay Module, 3 Safety Contacts

The Schmersal SRB301LC/B-24V (101177962) is a PROTECT SRB safety relay module for guard door monitoring and emergency stop circuits, with 3 safety contacts (STOP 0) and 1 signalling output.

It evaluates potential-free contacts such as emergency stop buttons, position switches and solenoid interlocks, safety magnetic switches (through integrated current and voltage limiters) and the outputs of AOPDs such as safety light curtains. It is rated up to PL e, Category 4 and SIL 3 with a PFH of 2.0 x 10^-8 /h, supports automatic start or a start button with feedback circuit monitoring, and drops out within 25 ms on emergency stop. It has screw terminals, a mechanical life of 10 million operations, weighs 230 g and operates from -25 to +45 C.