Signal processing modules, high-voltage, for potential-free voltage measurement / M635BH

The high-voltage signal processing module is made of two galvanically separated assemblies: a) the high-voltage part with galvanically separated supply and b) the low-voltage part with voltage converter and amplification. An alternating voltage is generated from the supply voltage of the measuring system, and a transformer transmits this supply voltage galvanically isolated to the high voltage part. The high measuring voltage is modulated and transmitted galvanically separated to the low voltage part. A demodulator extracts the measurement voltage and feeds it filtered to an instrumentation amplifier. The measured signal output is 2 V full scale (FS) with a DC potential of Ex/2. The optionally available Dallas ID module is integrated into the connector and then the sensor ID can be read out via the 1-wire bus, as long as the function is supported by the measuring system in use. The high-voltage cable comes standard with two 4 mm lab connectors.