Switch Mode Power Supply
S8VM
15
Engineering Data
(300-W, 600-W, 1,500-W Models)
■
Derating Curve
300W/600W/1,500W
Note: 1. Internal parts may occasionally be deteriorated or dam-
aged. Do not use the Power Supply in areas outside the de-
rating curves (i.e., the area shown by shading
A
in the
above graph).
2. When mounting two or more Power Supplies side-by-side,
allow at least 20 mm spacing between them. Always provide
at least 50 mm of mounting space for the surface with the
fan mounted. Be sure to provide at least 50 mm (S8VM-
300
@@
C/600
@@
C) or 100 mm (S8VM-15224C) of mount-
ing space on the opposite side of the surface with the fan
mounted.
3. When using the 1,500-W model for a long period of time at
an input voltage of 90 VAC or lower, reduce the load to 80%
or less of the above derating curve.
4. The ambient temperature is specified at a location 50 mm in
front of the center of the Power Supply's front panel.
■
Mounting
Standard Mounting
Horizontal Mounting
Upside-down Mounting (S8VM-15224C Only)
Side Mounting
Note: 1. The internal parts may occasionally deteriorate or be bro-
ken due to adverse heat dissipation depending on the
mounting status. Do not use the Power Supply in any
mounting direction other than those specified.
2. Use the metal plate as the mounting panel (*1).
3. To ensure sufficient cooling, do not cover the air holes locat-
ed on the side the fan is mounted and the opposite side.
4. Mounting screw tightening torque (recommended value: M4
(1.27 N·m))
The screws must not protrude more than 6 mm inside the
Power Supply.
■
Remote Sensing Function
This function is used to compensate for voltage drops on the load
lines. Connect the
+
S pin (pin 2 on CN) to the positive load terminal
and the
−
S pin (pin 4 on CN) to the negative load terminal to enable
remote sensing. When not using the remote sensing function, use
the standard connector. The
+
S and
+
V pins (pin 1 on CN) and the
−
S and
−
V pins (pin 3 on CN) will be connected.
Note: 1. Use 2-conductor shielded cable as connection wire (* 1).
2. Use as thick a wire as possible since high voltage drops on
the load lines (* 2) may activate the overvoltage protection
function.
3. Use when the voltage drop is 0.3 V or lower.
4. If the sensing line is too long, it is necessary to put an elec-
trolytic capacitor across the load terminals. The electrolytic
capacitor may generate heat due to the ripple current, de-
pending on connected load. Therefore, the electrolytic ca-
pacitor must have a ripple current allowance higher than the
output ripple current.
5. The stability and accuracy of the output will deteriorate if the
+
S or
−
S pins are open. Always connect the
+
S and
−
S pins.
6. Remove the standard supplied connector and prepare a
connector separately.
−
20
−
10 0 10 20 30 40 50 60 70
80
120
100
80
60
40
20
0
Load r
atio (%)
Ambient temperature (˚C)
*1
*1
*1
300 W
600 W
1,500 W
Correct
Correct
Correct
600 W
*1
*1
*1
300 W
1,500 W
Correct
Correct
Correct
*1
1,500 W
Correct
300 W
600 W
1,500 W
Incorrect
Incorrect
Incorrect
+
V
*2
+
−
V
*1
−
V
−
S
S8VM
CN
+
V
+
S
