Repeater KFD0-CS-Ex1.54, Signal type, Isolated Barriers (K-System), 1-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, Reverse polarity protection, Up to SIL 2 (SC 3) acc. to IEC/EN 61508