Backup Operation - Omron S8FS-G Series Manual

S8FS-G

Backup Operation

Backup operation is possible if you use two Power Supplies of the
same model. Even if one Power Supplies fails, operation can be
continued with the other Power Supply. Make sure that the maximum
load does not exceed the capacity of one Power Supply.
Connect the S8VK-R or external diodes as shown in the following
figure for backup operation. Refer to the S8VK-R datasheet (Cat. No.:
T059) for information on using the S8VK-R.
Use the following information as a guide to the diode type, dialectic
strength, and current.
Type
Dielectric strength (V )
RRM
Forward current (I )
F
In Case There Is No Output Voltage
There is a possibility that overload protection, overvoltage protection,
or overheating protection are functioning. The internal protection may
operate if a large amount of surge voltage, such as a lightning inrush,
is applied to the input. In addition, other possible causes for some
models include stoppage of the built-in fan and the remote control
function (OFF). Check the following five points. If there is still no
output voltage, contact your OMRON representative.
• Checking Overload Protection:
Remove the load wires and check whether the load is in an
overload state or is short-circuited.
• Checking Overvoltage or Internal Protection:
Turn the power supply OFF, leave it OFF for at least three minutes,
and then turn it ON again to see if this clears the condition.
• Checking Overheating Protection (300 W/600 W):
Turn OFF the input power supply long enough for the Power
Supply to cool sufficiently and then turn it ON again.
• Checking for Built-in Fan Stoppage (300 W/600 W):
Check whether or not the built-in fan has stopped.
• Confirming Remote Control Operation (Power Supplies with
Remote Control):
Check whether or not the +RC and -RC terminals are open.
Connect the terminals as specified.
32
S8FS-G S8VK-R
+V +V
INPUT IN 1
-V -V
S8FS-G
+V
INPUT IN 2
-V
S8FS-G
+V
INPUT
-V
S8FS-G
+V
INPUT
-V
Schottky Barrier diode
Twice the output voltage or above
Twice the rated output current or above
Charging a Battery
If you connect a battery as the load, install overcurrent control and
overvoltage protection circuits.
Built-in Fan Replacement
<Only S8FS-G300@@@/600@@@>
The built-in fan cannot be replaced.
Audible Noise at Power ON
<Only S8FS-G300@@@/600@@@>
A harmonic current suppression circuit is built into the Power Supply.
This circuit can create noise when the input is turned ON, but it will
last only until the internal circuits stabilize and does not indicate any
problem in the Power Supply.