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Introduction

In industrial plants, the transmission of measuring and control signals almost always requires electrical isolation of the signals being processed both for safety reasons and in order to achieve optimum signal quality (see Fig. 1).

Measurements at dangerously high voltages or in areas where there is an explosion hazard, different ground potentials (see Fig. 2) for example, in plant sections located a long way apart, as well as high common-mode voltages do not allow direct connection of the measuring signals with other devices or assemblies. In this case, it is absolutely essential to electrically isolate the transmitted signals.

Knick offers suitable components for electrical isolation in various designs to meet these requirements. Our range includes modular housings, M12 field housings with IP68 protection, solder-in modules, and Eurocards. Depending on the model, the appropriate measuring signals are also amplified or converted to the standard values 10 V or 20 mA. Voltages of a few mV up to 3000 V and currents of a few μA up to 10 A can be transmitted or converted with a high level of accuracy.

Isolation of dangerous high voltages

Fig. 1: Isolation of dangerous high voltages

 

Avoiding interference caused by differences in potential

Fig. 2: Avoiding interference caused by differences in potential

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