Circutor DHB Series Manual do Utilizador descarregar pdf (Página 24)

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-2xx 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-224). 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 respec-

tively, always switched on and always switched off. These modes are

destined for the manual simulation of alarm states.

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