3.2.2 Kleinsignalschalter

In dieser Schaltung ist der Grenzschalter ein normaler mechanischer Schalter (Reedkontakt) für kleine Gleich- oder Wechselspannungen. Für den Reedkontakt sind daher die üblichen Schutzmaßnahmen vor- zusehen (s. Abb. 6b).

Bei Schaltspannungen >24V ist beim Typ 740.0060 R1 zu entfernen (s. Abb. 1).

Kleinlast

Grenzwerte (s. Kap. 9) und Schutzmaßnahmen

 

 

(s. Abb. 6b) beachten.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Abb. 6a: Anschluss als Kleinsignalschalter

Abb. 6b: Schutzmaßnahmen für Gleich- und

 

 

Wechselspannungen

 

 

 

 

 

 

 

 

 

 

 

3.2.3 Namur-Schalter

 

 

 

 

 

 

 

Abb. 7: Anschluß als Namur-Schalter

3.3 Grundeinstellung des Schaltzustandes

Vor der Inbetriebnahme muss jeder Schalter in die richtige Schaltlage gebracht werden, abhängig von der Position des Schwimmers. Dies kann mit Hilfe eines Richtmagneten (BG10XXXXMAKU, im Lieferumfang der PHÖNIX - Anzeiger enthalten) erfolgen, der am Gehäuse vorbei in Pfeilrichtung (vergl. Abb. 3a und 3b) bewegt wird. Der Richtmagnet kann auch geringfügig seitlich am Gehäuse vorbei bewegt werden.

Der Schaltzustand kann durch Anschluss eines Durchgangsprüfers (Summer, Ohmmeter) an den Klem- men 1 und 3 überprüft werden. Dabei ist die Betriebsspannung abzuschalten!

4 Bedienung

4.1 Zweipunkt-Regelung mit 740.0060

Aufgrund der Hysterese (s. Kap. 9) des bistabilen Schaltelements kann der Schalter zur Zweipunktrege- lung von Flüssigkeitsständen verwendet werden.

PHÖNIX Messtechnik GmbH, Salzschlirferstr. 13, D-60386 Frankfurt/M., Germany, Tel: +49/69/416742 -20, Fax: -29

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Euphonix 740.0065NA instruction manual Bedienung, Grundeinstellung des Schaltzustandes, Zweipunkt-Regelung mit

740.006, 740.0065, 740.0065NA specifications

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