2-channel, 115/230 V AC supply, 3-wire PNP/NPN sensor or push-pull input, Relay contact output, DIP switch selectable functions, Minimum/maximum control, Up to SIL 2 acc. to IEC/EN 61508 / IEC/EN 61511, Housing width: 20 mm, Number of channels: 2-channel, Interval relay, Min./max. control, Safety Integrity Level (SIL): SIL 2, Rated voltage: 90 ... 253 V AC , 45 ... 65 Hz, Field device: 3-wire sensor, Field device [2]: Push-pull (4 in 1) output, Type: 2 x relay (change-over contact)