Switch Mode Power Supply
S8VS
17
Engineering Data (60-W, 90-W, 120-W, 180-W, 240-W Models)
■
Derating Curve
Note: 1.
Using side mounting bracket for right-side mounting (ex-
cluding 240-W Models).
2.
Internal parts may occasionally deteriorate or be damaged.
Do not use the Power Supply in areas outside the derating
curve (i.e., the area shown by shading
A
in the above
graph),
3.
If there is a derating problem, use forced air-cooling.
■
Mounting
Note:
Improper mounting will interfere with heat dissipation and may
occasionally result in deterioration or damage of internal parts.
It may also result in failure of the maintenance forecast monitor
function. Use the standard mounting method only.
■
Overload Protection
The Power Supply is provided with an overload protection function
that protects the power supply from possible damage by overcurrent.
When the output current rises above 105% min. of the rated current,
the protection function is triggered, decreasing the output voltage.
When the output current falls within the rated range, the overload
protection function 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 cur-
rent 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. When an excessive volt-
age that is approximately 130% of the rated voltage or more is out-
put, the output voltage is shut OFF. Reset the Power Supply 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 overvolt-
age has been removed.
■
Inrush Current, Start Up Time,
Output Hold Time
−
20
−
10 0 10 20 30 40 50 60 70 80
120
100
80
60
40
20
0
Load (%)
Ambient temperature (˚C)
See note 1.
1
Upper
Upper
Standard mounting
Face-up mounting
Correct
Incorrect
0
50
100
0
50
100
Output current (%)
Output voltage (V)
Output current (%)
Output voltage (V)
Intermittent operation
60-W/90-W/120-W/180-W Models
240-W Models
The values shown in the above diagrams are for reference only.
+15%
−
10%
0V
+30%
(approx.)
Overvoltage protection
operating
Variable range
Rated output
voltage
Output voltage (V)
The values shown in the above diagram is for reference only.
90%
96.5%
Start up time (1,000 ms max.)
AC input
voltage
AC input
current
Output
voltage
Inrush current on input application
Input OFF
Input ON
Hold time
(20 ms min.)
