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a) n-on b) n-off

c) on d) off

Fig. 12. Alarm types: a) n-on, b) n-off c) on d) off.

5.4.5. Alarm Types

The DHB-1xx meter is equipped with 2 alarm outputs with NOC contact

(make contact) and two alarm outputs with NOC/NCC contact (make

and break contact) (DHB-124). Each of alarms can work in one of the

six modes. The work of alarms in modes is presented in the fig. 12:

n-on, n-off, on, off. Two remaining modes: h-on and h-off mean suitably,

always switched on and always switched off. These modes are des-

tined for the manually simulation of alarm states.

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Circutor DHB Series Bedienungsanleitung Seite 32