The PROFIBUS Dual Encoder is a 12MBd DP-Slave-Tool with 8 digital counting inputs and 4 digital outputs. The inputs of PBE1 are galvanically separated so that signals of various potentials and polarity can be easily connected with PBE1. Level-changes of the digital inputs are recognized and processed within one millisec. So four inputs can be combined to one incremental position encoder. To form a position encoder-four inputs, is necessary, such as: count up input, count down input, zero input and error input. The count values for a switch-off function at the relay-outputs can be con-figurated by profibus.
The PROFIBUS Counter?s power suppy needs a DC-voltage between 12V to 24V at a maximum current of 1A to 0,5 A . For a logical '1' the digital inputs need a minimum current of 5mA. The maximum input voltage is 7V DC. The maximum AC current switched at the relay is 6A with 250V. To protect the contacts of the relay a 250V-Varistor is connected in prallel.