Operating instructions | Euphonix 740.0065NA specs

low load

Fig. 6a: Connected as a mini switch

3.2.3 Namur switch

For switch type 740.0060 at voltages >24 V remove the resistor marked with R1 (s. fig. 1).

Please observe limit values (chapter 8) and safety precautions (s. fig. 6b).

Fig. 6b: safety precautions for operation in low

DC/AC circuits.

740.0065NA

Fig. 7: Connecting of the Namur switch

3.3 Setting the switch position

Before starting-up, the bistable Reed contact must be properly set, in relation to the float in the level gauge. This can be accomplished by using the control magnet (PHÖNIX part BG10XXXXMAKU, delivered with liquid level gauges). This is moved up or down along the switch according to figs. 3a and 3b. The switching function can be tested using an appropriate alarm or ohmmeter on the terminals 1 and 3. In this case the system voltage, external wires must be disconnected !

4 Operating instructions

4.1 Two-step action with overlap with one PHÖNIX type 740.0060 level switch

Due to the Hysteresis of the bistable level switch type 740.0060 (see chapter 9) it can be used for a two- step action of liquid levels.

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

740.006, 740.0065, 740.0065NA specifications

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