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● Series Operation
• Connect the Power Supplies in series to increase the
output voltage.
INPUT
INPUT
List of Main Models that Support Series Connection of
Outputs
Model
Power ratings
S82K
90, 100 W
100 W
S82J
50, 150, 300, 600 W
S8TS
25, 30, 60 W
S8VS
15, 30, 60, 90, 120, 180, 240 W
S8VM
15, 30, 50, 100, 150 W
• The above table lists the main models for which series
connection is possible. Refer to the datasheet for each model
for details.
If models that do not support series connection are used, one
of the Power Supplies may not operate when the AC Power
Supply is turned on, possibly damaging internal circuits over a
period of time.
• If models with different power ratings or rated voltages are
wired in series, keep the current flowing to the load below the
rated output current for the Power Supply with the lowest
power rating.
• If the load is short-circuited when using an S82J-05024@@,
S82J-10024@@, S8VM, S8VS, or S8TS-02505@, reverse
voltage will occur inside the Power Supply, which may cause
Power Supply deterioration or damage. It is recommended to
connect the diodes (D
and D
1
diagram.
Guidelines for the type, dielectric strength, and forward current
of the diodes are as follows:
• Type: Schottky barrier diodes.
• Dielectric strength (V
): Twice the rated output voltage of
RRM
the Power Supply or higher.
• Forward current (I
): Twice the rated output current of the
F
Power Supply or higher.
● Backup Operation
• Two Power Supplies can be wired in parallel even
though each has a sufficient power rating. This can be
done to ensure (back up) Power Supply even if one of
the Power Supplies fails.
(Backup operation is possible for all Power Supplies
with single outputs.)
Power Supply A
Power Supply B
Use the same model of Power Supply for A and B.
D
V
1
1
V
Load
L
D
V
2
2
V
V
+V
L=
1
2
Rated output voltage
24 VDC
5, 12, 15, 24 VDC
24 VDC
5, 12, 24 V
24 VDC
5, 12, 15, 24 VDC
) as shown in the above
2
D
1
Load
D
2
• Select the Power Supplies A and B so that either has a
sufficient power rating for the load.
• Be sure to connect diodes to both Power Supplies A and B, as
shown in the diagram, so that the Power Supply backing up
the faulty Power Supply is not affected.
Guidelines for the type, dielectric strength, and forward current of
the diodes are as follows:
• Type: Schottky barrier diodes.
• Dielectric strength (V
RRM
• Forward current (I
): Twice the rated output current of the
F
Power Supply or higher.
• Increase the output voltage settings of Power Supplies A and
B just enough to allow for the voltage drop (V
and D
.
2
Also, make sure that the diodes are sufficiently cooled so that
their temperatures remain below the catalog value.
This is necessary to control the power loss (output current of
× diode forward voltage V
Power Supply I
OUT
the diodes.
• Some power loss to the load will occur due to the load power
and diodes. Therefore, do not exceed the rated power (rated
output voltage × rated output current) of the Power Supply.
● Creating ± (Positive/Negative) Outputs
• The floating output (the primary and secondary circuits are
separated) enables creating ±outputs using two Power
Supplies. To create ±outputs, connect two of the same model
of Power Supply as shown in the diagram.
• All models of Power Supply can be used to create ± outputs. If
there is the possibility that another load is wired in series, such
as a Servomotor or operation amplifier, as shown in the
diagram, connect bypass diodes D
diagram. Without these diodes, the Power Supplies may not
start when power is turned ON, possibly damaging internal
circuits over a period of time.
No diodes are required for models that support series
operation.
• Guidelines for the type, dielectric strength, and forward current
of the diodes are as follows:
• Type: Schottky barrier diodes.
• Dielectric strength (V
RRM
• Forward current (I
): Twice the rated output current of the
F
Power Supply or higher.
Technical Information
Power Supply
): The rated output voltage of the
Power Supply or higher.
) on diodes D
F
) resulting across
F
V
V
INPUT
V
Load
0 V
V
Load
INPUT
V
V
and D
as shown in the
1
2
INPUT
D
1
Load
Load
Load
INPUT
D
2
): Twice the rated output voltage of
the Power Supply or higher.
1
7
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