2857 Series Current Signal Conditioner Wago 2857 series current signal conditioner measures AC-DC currents up to 100 A, while converting the measured current into an analogue standard signal at the output. Providing both digital signal output and relay with changeover contact. Features and Benefits Clipping capability provides analogue signal limitation to output end values Adjustable software filter Input/output response simulation via configuration display Safe 3 way isolation with 4 kV test voltage per EN 61140