OM 3-1 pulse converters are utilized for electrical isolation, signal level conversion and eliminate interference signals. Optocouplers isolate the inputs from the outputs. The output stages are equipped with the latest driver ICs, and enable signal transmissions along long lengths of cables in conjunction with high output frequencies. Short-circuits and output stage overload are signalled. It is possible to snap the 50 x 75 x 52 mm (W x H x D) module onto EN 50 022 standard mounting rails.