Frequency Converter with Direction and Synchronization Monitor KFD2-UFT-Ex2.D, Signal type, Isolated Barriers (K-System), 2-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, Input frequency 1 mHz ... 1 kHz, Current output 0/4 mA ... 20 mA, Relay contact and transistor output, Start-up override