Specifications

3 Peak Current
4.1 Series Operation
¡
You can use a power supply in series operation. The output cur-
rent in series operation should be lower than the rated current of a
power supply with the lowest rated current among power supplies
that are serially connected. Please make sure that no current ex-
ceeding the rated current fl ows into a power supply.
4 Series/Parallel
Operation
¿
PBA300F-24, PBA600F-24, PBA1000F-24,
PBA1500F-24/36 and PBA1500T-24
¡
The units can generate the peak current under the following con-
ditions.
-
AC170 - 264V
-
t1
[
10 [sec]
-
Ip
[
Rated peak current
-
Iave
[
Rated current
-
Duty=
t1
X
100 [%]
[
35%
t1+t2
¡
Even a slight difference in output voltage can affect the balance
between the values of I
1
and I
2
.
Please make sure that the value of l
3
does not exceed the rated
current of a power supply.
l
3
[
rated current value
¿
PBA300F, PAB600F, PBA1000F, PBA1500F
and PBA1500T
¡
You can use the power supplies in parallel operation by connect-
ing units as shown in Fig.4.3.
Please parallelly connect ±S, VB and CB of each power supply in
parallel operation and connect ±S and ±M on CN1 of the master
power supply.
When the power supplies are shipped from a factory, they come
with a dedicated harness (H-SN-19) being mounted on CN1.
Please remove the dedicated harness (H-SN-19), which is mount-
ed on CN1 of the slave power supply, and use an optional har-
ness, H-PA-3, to connect ±S, VB and CB parallelly.
Differences in the output current values among the power supplies
in parallel connection are 10% at most. Please make sure that
the sum of the output current values does not exceed a value ob-
tained from the right side of the following equation.
(Output current in parallel operation)
= (Rated current per unit)
X
(Number of units)
X
0.9
¡
When the number of units in parallel operation increases, the in-
put current also increases. Please design input circuitry (including
circuit pattern, wiring and current capacity for equipment) carefully.
¡
Please make sure that the wiring impedance of a load from each
power supply becomes even. Otherwise, the output current bal-
ance circuit may become inoperative.
¡
The maximum number of units you can use in parallel operation is
5.
4.2 Parallel Operation/Master-slave Operation
¿
PBA10F, PBA15F, PBW15F, PBA30F,
PBW30F, PBA50F, PBW50F, PBA75F,
PBA100F and PBA150F
¡
Parallel operation is not possible.
¡
Redundancy operation is available by wiring as shown below.
¡
The PG signal (Alarm) circuit is isolated from input, output, FG,
RC and AUX.
AC-DC Power Supplies Enclosed type
Instruction Manual
PBA/PBW-39
PBA/PBW
Fig.4.1 Examples of connecting in series operation
Fig.3.1 Peak current
Load
(a) (b)
Load Load
Power
Supply
+
-
Power
Supply
+
-
Power
Supply
+
-
+
-
Power
Supply
[A]
Output current
Ip:Peak current
Iave:Average current
t1 t2
Fig.4.2 Example of connecting in redundancy operation
I2
I1 I3
-
+
+
-
Load
Power
Supply
Power
Supply
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