2-channel isolated barrier, 24 V DC supply (bus powered), Dry contact or NAMUR inputs, 2 relay contact outputs, Line fault detection (LFD), Reversible mode of operation, Up to SIL 2 acc. to IEC/EN 61508, Housing width: 12.5 mm, Number of channels: 2-channel, Safety Integrity Level (SIL): SIL 2, Rated voltage: 19 ... 30 V DC bus powered via Termination Board, Field device: NAMUR sensor, Field device [2]: volt-free contact, Line fault detection, Type: 2 x relay (NO contact), Fault indication output