6
Power Supply
Technical Information
●
Remote Sensing Function
Remote sensing can be used to compensate for a voltage drop
on the load lines. (The compensation range is ±10% of the rated
output voltage.)
To use remote sensing, remove the short bars from the remote
sensing terminals (short-circuited in standard shipments) and
wire as shown in the following diagram.
Make sure that the remote sensing screws are not loose. Loose
screws will prevent output of the output voltage.
To ensure stable operation, it is advisable to thicken the load
connection line and compensate for the amount of voltage drop
using the Power Supply’s voltage adjuster (V.ADJ).
The output voltage of the Power Supply can be varied using an
external variable resistor connected between terV and
+S (except for S8VM).
●
Remote Control Function
The output voltage of the Power Supply can be turned ON and
OFF from an external signal while the input voltage is being
applied to the Power Supply. To use this function, remove the
short bars from the remote control terminals (short-circuited in
standard shipments) and connect the switch or transistor as
shown in the following diagram. The output voltage will stop
when the remote control terminals are open.
If the remote control screws become loose, output voltage may
not be produced. Make sure that the screws are tight.
When a transistor is used, make sure that the collector-emitter
voltage V
CE
of the transistor is 20 V or higher and that the
collector current I
C
is 5 mA or higher.
●
Parallel Operation
•
Connect Power Supplies in parallel to increase the
output current if sufficient output current for the load
cannot be obtained from one Power Supply.
List of Connection Methods and Main Models that
Support Parallel Operation of Outputs
•
Up to two of the same model can be connected in parallel for
the S82K (100 W), up to four of the same model can be
connected in parallel for the S8TS and S8T-DCBU-02, and up
to five of the same model can be connected for the S82J (300,
600 W).
•
The above table lists the main models for which parallel
connection is possible. Refer to the datasheet for each model
for details.
Attempting parallel connection for models that do not support it
may result in an unbalanced load current, possibly causing the
rated output current to be exceeded, so the parallel connection
is not possible.
•
Use the same length and thickness of load connection line to
ensure that the voltage drop between each Power Supply and
load is the same.
●
N+1 Redundant Operation
Applicable Models: S8TS
Redundant operation is used in parallel connections of N Power
Supplies (single operation when N = 1) of the same model,
where a redundant Power Supply is added to the number of
Power Supplies (N) in parallel operation (N+1), thereby
improving the reliability of the system.
V. ADJ DC ON
Load
Load connection line
Remove
the short
bars.
Remote sensing connection line
(2-conductor shielded cable)
Note 1. When the voltage
drop in the load
lines is large, the
overvoltage
protection function
may activate due
to the increase in
voltage to correct
the voltage drop,
so be sure to use
as thick as a wire
as possible.
Note 2. Be sure that
V
OUT
×
I
OUT
does
not exceed the
rating of the
Power Supply.
V. ADJ DC ON
Remove
the short
bar.
VR
The output voltage
variable range is ±10%.
Model
Connection method
S82K-10024
S8T-DCBU-02
Only connect the +V and
−
V outputs in parallel
S82K
(100 W (- P type only)
S82J (300, 600 W)
Connect the +V and
−
V outputs in parallel and
set the parallel operation selection switch to
PARALLEL.
S8TS (12 V, 24 V)
Connect the bus line connector.
Remove
the short
bars.
Tr
SW
INPUT
I
1
I
2
I
L
I
L=
I
1+
I
2
INPUT
Load
