S8VK-X
23
• Adjust the output voltage difference of each Power Supply to
50 mV or less, using the output voltage adjuster (V. ADJ).
• There is no current balancing function for S8VK-X. A high output
voltage unit may work at overcurrent state and in this situation, a
life of a Power Supply will be extremely short. After adjusting the
output voltage, confirm the output current of the Power Supplies
balances.
• During parallel operation, UL1310 Class 2 output and UL 60950-1,
UL 62368-1, EN 60950-1, and EN62368-1 LPS output are
excluded.
• For Parallel Operation, to balance the current of the each unit, the
length and thickness of each wire connected to the load and each
unit must be same as much as possible.
• If you use the output voltage may drop by several volts if the load
changes rapidly (e.g., if the load starts or is disconnected). Use the
S8VK-R or connect external diodes as shown in the figure.
For parallel operation with 30 W, 60 W, 90 W or 120 W Power
Supplies, use the S8VK-R10. For parallel operation with 240 W
Power Supplies, use the S8VK-R20.
• Do not use parallel operation when there is the possibility that the
input voltage will vary outside of the rated input range.
• Use the following information as a guide to the diode type, dialectic
strength, and current.
<Backup Operation>
Backup operation is possible if you use two Power Supplies of the
same model.
Even if one Power Supply fails, operation can be continued with the
other Power Supply.
Make sure that the maximum load does not exceed the capacity of
one Power Supply.
Use the S8VK-R or connect external diodes.
For backup operation with 30 W, 60 W, 90 W or 120 W Power
Supplies, use the S8VK-R10. For backup operation with 240 W
Power Supplies, use the S8VK-R20.
• Use the following information as a guide to the diode type, dialectic
strength, and current.
Two phases application for Single phase models
For All Single phase Models, S8VK-X
Basically OMRON single phase power supply can be used on two-
phases of a 3–phase-system when some of conditions satisfy like
below.
1.
The supplying voltage is below the maximum rated input.
OMRON Power supply allows the input voltage equivalent or less
than 240 VAC+10%.
Please confirm the input voltage between two lines if the input
voltage satisfies this condition before connecting.
2.
The external protector is needed on N input line to secure a safety.
N line has no protection of a fuse internally.
An appropriate fuse or circuit breaker should be connected on N
input line like the following.
Type
Schottky Barrier diode
Dielectric strength (V
RRM
)
Twice the output voltage or above
Forward current (I
F
)
Twice the rated output current or
above
INPUT
S8VK-X
S8VK-R
S8VK-X
+V
-V
+V
-V
INPUT
IN 1
IN 2
+V
-V
Load
+V
-V
+V
-V
INPUT
INPUT
S8VK-X
S8VK-X
Load
Type
Schottky Barrier diode
Dielectric strength (V
RRM
)
Twice the output voltage or above
Forward current (I
F
)
Twice the rated output current or
above
INPUT
S8VK-X
S8VK-R
S8VK-X
+V
-V
+V
-V
INPUT
IN 1
IN 2
+V
-V
Load
+V
-V
+V
-V
INPUT
INPUT
S8VK-X
S8VK-X
Load
An external
f
u
se or a
circ
u
it
b
reaker
max. 240
V
AC+10
%
Internal
F
u
se
Power Supply
N
L
L
1
L
2
L
3
PE
