2-channel isolated barrier, 24 V DC supply (bus or loop powered), Output 40 mA at 12 V DC, 55 mA current limit, Contact or logic control input, Entity parameter Io/Isc= 110 mA, Line fault detection (LFD), Up to SIL 2 acc. to IEC/EN 61508 (bus powered), Up to SIL 3 acc. to IEC/EN 61508 (loop powered), Housing width: 18 mm, Number of channels: 2-channel, Filter, Safety Integrity Level (SIL): SIL 3