KFA5-SR2-EX2.W Pepperl+Fuchs Switch Amplifier. 2-channel isolated barrier, 115 V AC supply, Dry contact or NAMUR inputs, Relay contact output, Line fault detection (LFD), Reversible mode of operation, Up to SIL2 acc. to IEC 61508/IEC 61511, Input: NAMUR sensor, Rated voltage: 103.5-126 V AC , 45-65 Hz, Output: relay