2-channel isolated barrier, 24 V DC supply (loop powered), SMART fire alarm input, Current input 1 mA ... 20 mA, Up to SIL 3 acc. to IEC/EN 61508, Housing width: 20 mm, Number of channels: 2-channel, Transfer direction: to the control system, HART communication, Safety Integrity Level (SIL): SIL 3, Rated voltage: 0 ... 24 V DC , loop powered, Signal: 2 x 1 ... 20 mA, Signal [2]: 2 x HART, Device: 2 x fire alarm, Signal: 2 x 1 ... 20 mA