● Safety relay modules for monitoring emergency stop switches, safety  electromagnetic switches, safety light grids, and safety door switches; 

● Redundant design of internal circuits, even if a single component fails,  the safety function can still be maintained; 

● With built-in self-detection function, each start and stop cycle  automatically detects the normal action and release of the internal relay; 

● Non-delayed contacts, up to 4 safety contacts output, manual or  automatic reset; 

● Meet the requirements of EN 60947-5-1 and EN60204-1, the safety  performance level can reach the PL e level of EN ISO 13849-1, meet  the requirements of EN IEC 62061 safety integrity SIL 3, and meet the  requirements of EN 61508 SIL 3; 

● Pluggable screw terminals or spring-loaded terminals are optional.