● Application of safety coupling relays in SIS process industry

● S-1H: 1oo3 redundant design; manual diagnosis of output relay safe state on dangerous fault

● S-1H1D: 1oo2 redundant design; manual or safety controller DI diagnosis of output relay safe state on dangerous fault

● S-1-1H: 1oo2 redundant design; self-diagnosis and safe state hold on dangerous component failure

● Compliant with IEC 61511, EN 60947-5-1 and EN 61508 SIL 3

● Plug-in screw or spring terminals optional