Pilz PNOZsigma PNOZ s6 C Two Hand Control Safety Relay, 48 → 240V ac/dc, Dual-Channel, 3 Safety Contacts

"Safety features The safety relay meets the following safety requirements The circuit is internally redundant with built-in self-monitoring. The safety device remains effective in the case of a component failure. The correct opening and closing of the safety device relays is tested automatically in each on-off cycle. "