Specifications

5.1 Installation
¡
Do not insert a screw more than 6mm from the outside of a power
supply to keep enough insulation distance between the screw and
internal components.
5 Assembling and
Installation
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PBA10F, PBA15F, PBW15F, PBA30F,
PBW30F, PBA50F, PBW50F, PBA75F,
PBA100F and PBA150F
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If you use two or more power supplies side by side, please keep
a suffi cient distance between them to allow enough air ventilation.
Ambient temperature around each power supply should not ex-
ceed the temperature range shown in the derating curve.
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PBA300F, PAB600F, PBA1000F, PBA1500F
and PBA1500T
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The power supplies have a built-in forced cooling fan. Do not
block ventilation at the suction side (terminal block side) and its
opposite side (fan installation side).
If you need to secure a power supply by screws, securely fi x it,
taking into consideration of its weight. You can install it in any di-
rection.
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If you use a power supply in a dusty environment, it can give a
cause for a failure. Please consider taking such countermeasures
as installing an air fi lter near the suction area of the system to pre-
vent a failure.
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In PBA300F, PBA1500F and PBA1500T, ventilation holes are lo-
cated on the mounting side. If you would like to install the unit by
using that side, please contact us for details.
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You can adjust the output voltage in parallel operation by adjusting
a potentiometer of just one power supply.
To do so, select one power supply as the master unit and turn the
potentiometers of the other (slave) power supplies clockwise to
the end.
Once you have done this, you can adjust the output voltage by
turning the potentiometer of the master unit.
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If you use the remote sensing function in parallel operation, con-
nect parallelly +S and -S of slave power supplies must be con-
nected to master and connect the sensing wire from the master
unit to the load.
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You cannot parallelly operate power supplies with different output
voltage or electrical power.
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If an output stops (through the remote ON/OFF circuit or due to
an input shutoff or failure) in parallel operation, the LED of the
stopped unit lights off.
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When the output current of one unit becomes 10% or less of the
rated current, the PG signals may turn ”High” and the fan may
stop.
4.3 N+1 Parallel Redundancy Operation
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PBA300F, PAB600F, PBA1000F, PBA1500F
and PBA1500T
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You can have N+1 redundancy operation for improved system reli-
ability.
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If you add one extra power supply in parallel operation, even if
one of the power supplies in your system fails, the remaining non-
failed power supplies continue to sustain the system. If one of the
power supplies stops operating, the output voltage may change
about 5%.
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When unit replacement is required due to unit failure, input volt-
age for all units must be cut off.
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After replacement, please make sure that all wirings are complet-
ed correctly, before re-applying input voltage.
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Hot-swap or Hot-plug is not available.
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If 2 or more units failed, suffi cient power could not be provided to
the system. Therefore, please replace the failed unit immediately
in case where unit failure is found.
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If you have any questions about series, parallel and N+1 redun-
dancy operations, please contact us.
AC-DC Power Supplies Enclosed type
Instruction Manual
PBA/PBW-40
PBA/PBW
Fig.5.1 Mounting screw
6mm max
C
hassis o
f
PBA series
Chassis of
customer system
Mounting Screw
Fig.4.3 Example of parallel connection
(PBA1500F)
(N)
V. ADJ
FGNC
AC
(L)
AC
CN1
CN2
CN3
(N)
V. ADJ
FGNC
AC
(L)
AC
CN1
CN2
CN3
(N)
V. ADJ
FGNC
AC
(L)
AC
CN1
CN2
CN3
Install H-SN-19
Install H-PA-3
Install H-PA-3
Remove H-SN-19
No.1(Master)
No.2(Slave)
No.5(Slave)
Load
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