S8VS
Mounting
Overvoltage Protection
Consider the possibility of an overvoltage and design the system so
Standard mounting with DIN rail
Face-up
mounting with DIN rail
that the load will not be subjected to an excessive voltage even if the
feedback circuit in the Power Supply fails.
This power supply automatically protects itself and the load from
overvoltage.
Overvoltage protection is activated if the output voltage rises above
approx. 130% of the rated output voltage.
To reset the power supply, leave the power supply off for more than
3 minutes and then turn it on again.
Standard mounting with S82Y-VS30P
Face-up
mounting with S82Y-VS30P
Note: The Side-mounting Bracket can be mounted from either side.
O
u
tp
u
t
v
oltage (
V
)
Overvoltage protection
operating
+30%
(approx.)
+15%
Variable range
Rated output
voltage
−
10%
Horizontal mounting with S82Y-VS30P*
0 V
S82Y-VS30P
Side with label
Note: 1. Improper mounting will interfere with heat dissipation and
may occasionally result in deterioration or damage of
internal parts. Use the Product within the derating curve for
the mounting direction that is used. Do not use the Power
Supply mounted in any way not shown above.
2. Use a mounting bracket (S82Y-VS30P, sold separately)
when the Product is mounted horizontally.
3. Heat dissipation will be adversely affected. When the
Product is mounted facing horizontally, always place the
side with the label facing horizontally.
4. Use PFP-M End Plates on the top and bottom of the Power
Supply when mounting horizontally on a DIN rail.
Overload Protection
The load and the power supply are automatically protected from
overcurrent damage by this function.
Overload protection is activated if the output current rises above
105% of the rated current.
When the output current returns within the rated range overload
protection is automatically cleared.
15-W Models
30-W Models
The values shown in the above diagram is for reference only.
Note: 1. Do not turn ON the power again until the cause of the
overvoltage has been removed.
2. The overvoltage protection of the S8VS-015
@@
uses a
zener diode clamp. The output voltage will be clamped at
approx. 140% or higher of the rated output voltage. If the
internal feedback circuit is destroyed by any chance, the
load may be destroyed by the clamped output voltage
(approx. 140% to 190% of the rated output voltage). The
power Supply will not restart if the output is turned OFF by
the overvoltage protection operation. If this occurs, replace
the Power Supply.
Inrush Current, Startup Time, Output Hold Time
Input ON
Input OFF
AC input
voltage
Inrush current on input application
AC input
current
90%
96.5%
Output
voltage
Startup time (1,000 ms max.)
Hold time
(20 ms min.)
O
u
tp
u
t
v
oltage (
V
)
O
u
tp
u
t
v
oltage (
V
)
Undervoltage Alarm Indication
LED (DC LOW: red) lights to warn of output voltage drop.
Detection voltage is set to approx. 80% (75 to 90%) of the rated output
voltage.
Note: This function monitors the voltage at the power supply output
terminals. To check actual voltage, measure voltage on the
operation
load side.
Intermittent
0
50
100
0
50
100
Output current (%)
Output current (%)
The values shown in the above diagrams are for reference only.
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.
15
Summary of Contents for S8VS 120-W
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