One method of measuring thickness is to calculate values from two opposing distance sensors. With up to six inputs, the CSP2008 universal controller allows synchronous recording of measured values from optical sensors: A pair of sensors is connected directly to the controller, another pair is connected via the EtherCAT fieldbus coupler and an integrated extension terminal. Two analog sensors measure the width of the material. These sensors are connected via a dual-channel analog input terminal. After the sensors have recorded their values, the CSP2008 calculates material thickness and width. Three switching inputs are used to set masters as per a calibration standard.