+S
-S
CN1
or CN2
+V
-V
Load
C
1
OPEN
Fig. 3.2 When not using remote sensing function
Wire as close as possible
R1
+S
-S
CN1
or CN2
+V
-V
Load
C
1
R2
Fig. 3.3 When using remote sensing function
3.10 Signal Output (LED / Alarm)
¡
Functions of LED indicators and Output of Alarm are shown below.
LED indicators and Output of Alarm are signals to check the pres-
ence/absence of voltage at the output terminal of a power supply
and to detect fault conditions.
The timing of signals might vary depending on input and load
conditions. Please evaluate thoroughly.
Table 3.2 LED indicator and Condition of Power supply
LED indicator
Condition of Power supply
Output
Blue
Orange
OFF
OFF
Turned off with remote ON/OFF,
or decreased output voltage
OFF or
Decreased
ON
OFF
Normal condition
ON
OFF
ON
Fault condition
OFF
Table 3.3 Explanation of alarm
Alarm
Output of Alarm
PG
The PG signals is “Low” when
the power supply operates cor-
rectly. The signal turns to “High”
when the power supply stops.
Open collector method
Good : Low
(0.5V max at 5mA)
Bad : High
50V 5mA max
100k
W
0.1
m
F
PG
PGG
Fig.3.4 Internal circuit of PG
¡
Please note the followings when you use the alarms (PG signal).
1
The PG signal turns to “High” when the output voltage is turned
off with remote ON/OFF.
2
When the output voltage drops to 40% or less of the rated out-
put voltage, the PG signal is “High”.
¡
Circuit of the alarm is isolated from input, output, FG, AUX and
various function terminals.
3.11 Communication function
¡
The power supply provides an “Extended UART”(INFO terminal)
digital interface that enables the user to configure many aspects
of the device operation as well as monitor the input and output pa-
rameters.
Please contact us for details.
¡
Extended UART is a communication protocol that enables single-
wire, bidirectional, insulated, and multiple communication of
UART, which is a general-purpose communication standard.
For details, please refer to the PCA Series Extended UART
Manual.
¡
Communication function terminal is isolated from input, output,
FG, AUX and various function terminals.
AC-DC Power Supplies Enclosed Type
Instruction Manual
PCA-12
