2-channel isolated barrier, 24 V DC supply (Power Rail), Output 45 mA at 11.7 V DC, Logic input, non-polarized, Line fault detection (LFD), Up to SIL 2 acc. to IEC/EN 61508, Housing width: 20 mm, Number of channels: 2-channel, Safety Integrity Level (SIL): SIL 2, Rated voltage: 20 ... 30 V DC, Type: logic input, Field device: 2 x Valve, Field device [2]: 2 x audible alarm, Field device [3]: 2 x visual alarm, Line fault detection, Current: ? 45 mA, Voltage: ? 11.7 V