01/02 AWB8230-1415GB
Programmable digital outputs
11 to 15
107
Fault signal (AL)
The digital output configured as AL is activated when a fault has
occurred.
X
Program one of the digital outputs 11 to 15 as AL by setting the
corresponding PNU (C021 to C025) to 05.
By default, AL is assigned to signalling relay K1 (terminal K11,
K12, K14).
Please note that the programmable digital outputs (including the
one configured as AL) are open collector types and therefore have
different electrical characteristics than the signalling relay outputs
(terminals K11, K12 and K14). In particular, the maximum voltage
and current carrying capacity ratings are significantly lower than
those of the relay outputs.
After the frequency inverter supply voltage has been switched off,
the AL output remains active until the DC bus voltage has dropped
below a certain level. This time depends, among other factors, on
the load applied to the inverter.
The delay from the time a fault occurs until the AL output is acti-
vated is about 300 ms.
Figure 109: Digital output 11 configured as AL (fault occurrence)
AL
24 V
50 mA
11
CM2
12
13
14
15
–
+
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