User manual

System 182-XT-4 Relay outputs

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ba76027e02 12/2014

Characteristic curves Through the selection of the Start value and End value, the proportional

output can be operated with a positive or negative characteristic curve.

 Positive characteristic curve:

Select the

End value to be greater than the Start value.

The turn-on duration or frequency increases with an increasing

measured value (see page 6-12).

 Negative characteristic curve:

Select the

End value to be smaller than the Start value.

The turn-on duration or frequency decreases with an increasing

measured value (see page 6-13).

The maximum values for the pulse width or switching frequency are

assigned to the End value value and the minimum values for turn-on

duration or frequency are assigned to the Start value value.

Fig. 6-6 Positive characteristic curve

Fig. 6-7 Negative characteristic curve

Measured value

Switching frequency f or

Pulse v

width

End valueStart value

Max.