Phoenix Contact Gmbh + Co. Kg

Benjamin Jeep

Winfried Thuer

Disclosed is a large-range input circuit for digital signals in the range of extra-low voltage signals of &#x2266;120 V and in the range of low voltage signals of &#x3c;1500 V, said input circuit comprising series-connected Zener diodes that are polarized in the reverse direction, each one defining at least one switching threshold in the range of the extra-low voltage signals or in the range of the low voltage signals, and can be selected to be active by not being bridged, wherein a respective auxiliary optocoupler, which can be controlled by a microprocessor, is used to bridge the inactive Zener diode.

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Lemgo, Germany

Benjamin Jeep