1-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, Passive transistor output, non-polarized, Passive fault output, non-polarized, 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: 1-channel, Safety Integrity Level (SIL): SIL 2, Systematic capability (SC): SC 3, Rated voltage: 19 ... 30 V DC, Field device: NAMUR sensor, Field device [2]: volt-free contact, Line fault detection