S8VK-S
12
Mounting
*
For front, side-by-side mounting, see page 18.
Overload Protection
For models S8VK-S03024, S8VK-S06024 and S8VK-S12024, the
output voltage is automatically reduced, and the unit is protected from
short circuit current and overcurrent damage if the load current 121%
to 160% of the rated current. For models S8VK-S24024 and S8VK-
S48024, the output voltage is automatically reduced, and the unit is
protected from short circuit current and overcurrent damage if the
load current 151% to 165% of the rated current.
When the output voltage returns within the rated range, overload
protection is automatically cleared.
Note: 1.
Internal parts may occasionally deteriorate or be damaged if a
short-circuited or overcurrent state continues during operation.
2.
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
Supply for such applications.
Overvoltage Protection
Consider the possibility of an overvoltage and design the system so
that the load will not be subjected to an excessive voltage even if the
feedback circuit in the Power Supply fails. If an excessive voltage that
is approximately 130% of the rated voltage or more is output, the
output voltage is shut OFF. Reset the input power by turning it OFF
for at least three minutes and then turning it back ON again.
Note:
Do not turn ON the power again until the cause of the
overvoltage has been removed.
Inrush Current, Startup Time, Output Hold Time
Note:
Twice the normal inrush current will flow during parallel operation
or for backup operation.
Also, if crossover wiring is used for N
number of Power Supplies, an inrush current of N times the inrush
current for a standalone Power Supply will flow.
Therefore, check the fusing characteristics of fuses and
operating characteristics of breakers making sure that the
external fuses will not burn out and the circuit breakers will not
be activated by the inrush current.
Two phases application for Single phase models
For All Single phase Models, S8VK-S
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.
Low-voltage detection output (Only for 240 and
480 W)
Output externally by photo-switch when an output voltage drop is
detected (OFF when an output drop occurs). The detection voltage is
set to about 80% (75% to 90%) of the rated output voltage.
Photo-switch
1.
30 VDC max., 50 mA max. Residual voltage 2 V or less when ON.
Leakage current 0.1 mA or less when OFF.
2.
The low-voltage detection output function monitors the voltage of
the output terminal of the power supply.
To check the precise voltage state, measure the voltage of the
load end.
3.
If the set voltage is less than 90% of the rated voltage, the low-
voltage detection function may activate.
4.
The signal output circuit do not contain current-limiting circuit. Do
not allow the output current to exceed 50 mA.
5.
After you complete the wiring, confirm that operation is correct.
Reference Value
(B) F
a
ce-
u
p mo
u
nting
(A)
S
t
a
nd
a
rd (Vertic
a
l)
mo
u
nting
(C) Front,
S
ide-
b
y-
s
ide
mo
u
nting
*
0
50
100
Output current (%)
Output v
oltage (V)
Intermittent operation
S8VK-S03024, S8VK-S06024,
S8VK-S12024
S8VK-S24024, S8VK-S48024
0
150
100
50
Output current (%)
Output v
oltage (V)
Intermittent operation
90%
96.5%
Startup time
Input
Voltage
Input
Current
Output
voltage
Inrush current on input application
Input OFF
Input ON
Hold time
Reliability
(MTBF)
Value
Single phase model
30 W: 640,000
60 W: 640,000
120 W: 480,000
240 W: 390,000
480 W: 330,000
Definition
MTBF stands for Mean Time Between
Failures, which is calculated according to the
probability of accidental device failures, and
indicates reliability of devices.
Therefore, it does not necessarily represent a
life of the product.
Life expectancy
10 yrs. Min.
Definition
The life expectancy indicates average
operating hours under the ambient
temperature of 40°C and a load rate of 50%.
Normally this is determined by the life
expectancy of the built-in aluminum electrolytic
capacitor.
An external
fuse or a
circuit breaker
max. 240 VAC+10%
Internal
Fuse
Power Supply
N
L
L
1
L
2
L
3
PE
