2 Wiring Input / Output Pin
2.1 Wiring input pin
(1) Fuse
¡
For the PCA series, AC(L) and AC(N) both have a fuse built in.
(2) Wire
¡
Please use an electric wire that is both as thick and short as
possible.
¡
Noise could be improved if the wire is twisted. In addition, please
be sure the input line and the output load are separated.
(3) Ground
¡
When installing the power supply with your unit, ensure that the
input FG terminal is connected to safety ground of the unit.
2.2 Wiring output pin
¡
When wiring the load wire, select the wire in consideration of the
heat generation so that the temperature of points A in Fig. 2.1 will
be below the specified temperature.
In the case of PCA600F-5-P2
Input condition: Vin=85 to 264VAC
-
When ambient temperature is 40
ª
or less, point A is 65
ª
or less
-
When ambient temperature is 70
ª
, point A is 75
ª
or less
( The ambient temperature 40
ª
to 70
ª
should be not more than
the calculated value by linear interpolation)
In the case of PCA600F-12,-15,-24 -P2
Input condition: Vin=85 to 170VAC
-
When ambient temperature is 40
ª
or less, point A is 65
ª
or less
-
When ambient temperature is 70
ª
, point A is 75
ª
or less
( The ambient temperature 40
ª
to 70
ª
should be not more than
the calculated value by linear interpolation)
Input condition: Vin=170 to 264VAC
-
When ambient temperature is 50
ª
or less, point A is 80
ª
or less
-
When ambient temperature is 70
ª
, point A is 75
ª
or less
( The ambient temperature 50
ª
to 70
ª
should be not more than
the calculated value by linear interpolation)
Point A
Fig. 2.1 Temperature measurement point
A thin electric wire could heat up and affect the power supply.
Please also use within the derating characteristics.
¡
The thermometry point is conductive. Please be careful of electric
shocks.
¡
Output ripple noise may be influenced by measurement
environment,measuring method Fig.2.2 is recommended.
¡
Output ripple and ripple noise is the value measured by the
method shown in Fig.2.2.
+Vout
-Vout
Load
150mm
C
1
Osiloscope /
Ripple noise meter
Bw:20MHz
Differential probe
+
C
1 :
Aluminum electrolytic capacitor 22μF
Fig.2.2 Measuring method of Ripple and Ripple Noise
Remarks :
When GND cable of probe with flux of magnetic force from power
supply are crossing, ripple and ripple noise might not measure
correctly.
Please note the measuring environment.
150mm
Bad example
Good example
Fig.2.3. Example of measuring output ripple and ripple noise
2.3 Output side attaching externally condenser
¡
Depending on the capacitance of the external capacitor, reso-
nance may occur due to ESR, ESL, and wiring inductance, so
please be careful of ripple increase.
¡
If the capacitance of the external capacitor is too large, the output
voltage may not rise.
2.4 Connection to pulse load
¡
When connecting a pulse load to the PCA series, connect a
capacitor Co bVout and -Vout.
*
If there is no external capacity when connected with pulse load,
output may be stopped by the internal protection circuit.
AC-DC Power Supplies Enclosed Type
Instruction Manual
PCA-9
