Dewetron DAQP-THERM and DAQP-MULTI galvanically isolated multisensor amplifiers

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Dewetron has introduced two galvanically isolated multisensor amplifiers with linearised analog output.

The DAQP-THERM module connects to any thermocouple and the DAQP-MULTI measures additional voltage, Pt100 to Pt200, constant current supplied bridges, and resistance.

The DAQP-MULTI measures additional voltage, Pt100 to Pt2000, constant current supplied bridges and resistance.

With the linearised analog ±5 V or 0 to 5 V output, the modules are suitable for signal conditioning any input signal. Together with 1 kV isolation and 160 dB CMR, the modules’ features include high accuracy, a freely programmable measuring range, internal linearisation, programmable internal filters up to the 8th order and a 3 kHz bandwidth.

The two modules are suitable for bench test applications where ruggedness and dynamics are required. In addition to the signal input, the sensor supply and TEDS lines are designed to be galvanically isolated.

The galvanic isolation, combined with a high CMR value of 160 dB, makes it possible to use uninsulated thermocouples directly onto frequency converters and deliver precise temperature measurements.

The two modules provide freely programmable measuring ranges, eg, thermocouple type T with +20 to +85°C or Pt1000 with -50 to +480°C, etc.

The internal linearisation provides a universally usable ±5 V or 0 to 5 V output signal so that precise measured values are available even where a measuring system or the input of a control unit has no possibility for software linearisation. Through an option in the DEWE-30 module rack, ±10 V or 0 to 10 V outputs can also be realised.

The modules have integrated filters to provide good signal quality. Butterworth or Bessel filters are programmable in the 2nd, 4th, 6th, or 8th order.

The DAPQ-THERM will support any thermocouple, although types K, J, T, R, S, N, E, B, L, C, and U are preset as defaults. With total flexibility due to its CJC design, high accuracy is provided.