A signal conditioner performs a series of functions on a signal to make it suitable for further processing. Signal isolation and conversion perfectly describe the main function of signal conditioners. Galvanic isolation interrupts the galvanic path between the input and output signals to prevent the transmission of unwanted signals. Galvanic isolation can also filter out unwanted noise or electrostatic interference caused by ground loops, which can severely damage sensitive equipment.

The signal conversion includes the supply, amplification, linearization, and scaling of the sensor signal into a standardized signal. By using standard signals, all applications can be processed in standardized multichannel analog input and output cards of the control system.

Pepperl+Fuchs provides two systems of signal conditioners, K-System and SC-System.