Code Alarm CR3 Manual de Serviço descarregar pdf (Página 22)

Settings MIQ/CR3; DIQ/CR3

4 - 8

ba76032e01 01/2012

Frequency output Switching frequency output is used, e.g. for controlling dosing pumps.

In contrast to the pulse-width output, not the pulse width is modulated

with frequency output but the switching frequency of the output signal.

Depending on the position of the measured value in the proportional

range, the relay is switched more often or less often.

Fig. 4-5 Relay output of frequency output

While the selected switching duration (t

= 0.3 s) always remains

constant, the switching frequency at which the relay switches changes

depending on the measured value.

 If the measured value is at the end of the proportional range (End

value), the switching frequency is higher.

 If the measured value is at the beginning of the proportional range

(Start value), the switching frequency is low.

Time [s]

t = 0.3 s

Relay

Off

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Code Alarm CR3 Manual de Serviço Página 22