Frequency Converter with Trip Values KFD2-UFC-Ex1.D, Signal type, Isolated Barriers (K-System), 1-channel isolated barrier, 24 V DC supply (Power Rail), Input for NAMUR sensors or dry contacts, Input frequency 1 mHz ... 5 kHz, Current output 0/4 mA ... 20 mA, Relay contact and transistor output, Start-up override