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Basic Function Details Section 2-4
2-4 Basic Function Details
2-4-1 Voltage Monitoring and Protection Functions
Abnormal Voltage
Tripping
When the output voltage converted from AC to DC exceeds 28.8 V, all of the
branch outputs will be cut off simultaneously and a TRP alarm will be output.
The seven-segment display will show error code A10.
It is not necessary for the user to set any parameters for this function.
Undervoltage
Detection
An undervoltage detection threshold can be set between 18.0 and 26.4 V.
Operation • If the output voltage falls below the detection threshold, the seven-seg-
ment display will show the error code A21 and the voltage value, and the
Undervoltage Detection Output (LOW) will turn OFF within 100 ms.
• The error display and Alarm Output can be reset when the voltage has
been above the detection threshold +0.3 V for 500 ms longer.
Tripping
operation
Seven-segment display Outputs Conditions
required to reset
28.8 VDC min.
20 ms max.
Alternately displays error
code A10 and the voltage.
The Tripping Alarm
Output (TRP) pho-
toswitch output
turns OFF.
Voltage below
28.5 V and after
tripping (15 s has
elapsed after pre-
vious reset.)
24-VDC output voltage
Branch output
TRP output
Reset possible
20 ms
max.
28.8 V
28.5 V
Setting
range
Default
value
Operation Seven -
segment
display
Outputs Conditions
required to
reset
18.0 to
26.4 VDC
20.0 V When the
voltage is
lower than the
detection
threshold con-
tinuously for
80 ms or
more, the
alarm is out-
put within
100 ms.
Alternately
displays error
code A21 and
the voltage.
The Under-
voltage
Detection
Output (LOW)
photoswitch
turns OFF.
Voltage above
the detection
threshold
+0.3 V contin-
uously for at
least 500 ms.
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