S8VK-G Datasheet, PDF (19/22 Pages) Omron Electronics LLC – Reliable and Easy Operation Resistant in tough environments Easy and fast installation The most compact size on the market

S8VK-G
Precautions for Correct Use
Mounting
 Take adequate measures to ensure proper heat dissipation to
increase the long-term reliability of the Product. Be sure to allow
convection in the atmosphere around devices when mounting. Do
not use in locations where the ambient temperature exceeds the
range of the derating curve.
 When cutting out holes for mounting, make sure that cuttings do
not enter the interior of the Products.
*1
DIN Rail Mounting
To mount the Block on a DIN Rail, hook portion (A) of the Block onto
the rail and press the Block in direction (B).
(A)
(B)
To dismount the Block, pull down portion (C) with a flat-blade
screwdriver and pull out the Block.
*2
*1
*1. Convection of air
*2. 20 mm min.
 Improper mounting will interfere with heat dissipation and may
occasionally result in deterioration or damage of internal parts. Use
the Product within the derating curvefor the mounting direction that
is used.
 Use a mounting bracket when the Product is mounted facing
horizontally.
 Heat dissipation will be adversely affected. When the Product is
mounted facing horizontally, always place the side with the label
facing upward.
 Operate the Power Supply within a range that is 5C less than the
values in the derating curve in Engineering Data on page 9 if the
Power Supply is used with an installation spacing of 10 mm min.
(20 mm max.) on the left and right.
Overcurrent Protection
 Internal parts may possibly deteriorate or be damaged if a
short-circuited or overcurrent state continues during operation.
 Internal parts may possibly deteriorate or be damaged if the Power
Supply is used for applications with frequent inrush current or
overloading at the load end. Do not use the Power Supplyfor such
applications.
 The DC ON indicator (green) flashes if the overload protection
function operates.
Charging a Battery
If you connect a battery as the load, install overcurrent control and
overvoltage protection circuits.
Output Voltage Adjuster (V.ADJ)
 The output voltage adjuster (V.ADJ) may possibly be damaged if it
is turned with unnecessary force. Do not turn the adjuster with
excessive force.
 After completing output voltage adjustment, be sure that the output
capacity or output current does not exceed the rated output
capacity or rated output current.
30 mm min.
(C)
Track stopper
Series Operation
Two power supplies can be connected in series.
Correct
AC (L)
+V
AC (N)
−V
AC (L)
+V
AC (N)
−V
Note: 1. The diode is connected as shown in the figure. If the load is
short-circuited, a reverse voltage will be generated inside
the Power Supply. If this occurs the Power Supply may
possibly deteriorate or be damaged. Always connect a
diode as shown in the figure.
Select a diode having the following ratings.
Type
Schottky Barrier diode
Dielectric strength (VRRM) Twice the rated output voltage or above
Forward current (IF)
Twice the rated output current or above
2. Although Products having different specifications can be
connected in series, the current flowing through the load
must not exceed the smaller rated output current.
Making Positive/Negative Outputs
 The outputs are floating outputs (i.e., the primary circuits and
secondary circuits are separated). You can therefore make
positive and negative outputs by using two Power Supplies.
You can make positive and negative outputs with any of the
models.
If positive and negative outputs are used, connect Power Supplies
of the same model as in the following figure. (Combinations with
different output capacities or output voltages can be made.
However, use the lower of the two maximum rated output currents
as the current to the loads.)
+V
+V
INPUT
−V
0V
+V
INPUT
−V
−V
 Depending on the model, internal circuits may be damaged due to
startup failure when the power is turned ON if loads such as a
servomotor or operational amplifier may operate in series.
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