2-channel isolated barrier, Universal usage at different power supplies, Dry contact or NAMUR inputs, Relay contact output, Line fault detection (LFD), Reversible mode of operation, Up to SIL 2 (SC 3) acc. to IEC/EN 61508, Housing width: 20 mm, Number of channels: 2-channel, Safety Integrity Level (SIL): SIL 2, Systematic capability (SC): SC 3, Rated voltage: 19 ... 30 V DC / 90 ... 253 V AC 50 ... 60 Hz, Field device: NAMUR sensor, Field device [2]: volt-free contact, Line fault detection