ACS-CONTROL-SYSTEM GmbH
l Lauterbachstr. 57 l D-84307 Eggenfelden l www.acs-controlsystem.de l [email protected]
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7. Alarms / Relays
This device has 4 virtual alarms that can monitor one limit value in regard of an undercut or exceedance.
Each alarm can be allocated to an optional relay output S1-S4; furthermore alarms can be controlled by
events like e.g. Hold or min/max-value.
Function principle of alarms / relays
Alarm / Relay x
Deactivated, instantaneous value, min/max-value, hold-value, sliding
average value or an activation via the digital input
Switching threshold
Threshold / limit value of the change-over
Hysteresis
Broadness of the window between the switching thresholds
Working principle
Operating current / quiescent current
7. Alarms / Relays
Operating current
By operating current the alarm S1-S4 is
off
below the threshold and
on
on reaching the
threshold.
Quiescent current
By quiescent current the alarm S1-S4 is
on
below the threshold and switched
off
on
reaching the threshold.
Switching-on delay
The switching-on delay is activated via an
alarm and e.g. switched 10 seconds after
reaching the switching threshold, a short-
term exceedance of the switching value does
not cause an alarm, respectively does not
cause a switching operation of the relay. The
switching-off delay operates in the same way,
keeps the alarm / the relay switched longer
for the parameterised time.
