Omron S8JX-G Series, Installation Instructions Manual, Page: 58 / 61

S 8 JX
5 8
S8JX-G
S8JX-P
Common Precautions
Connecting CB terminal (5 pin on CN) and CBG terminal (6 pin on
CN) enables the current balancing function and that allows the
parallel operation at 80% or less of the total output capacity.
Up to five Power Supplies can be connected.
•
Use 2-conductor shielded cable as a connection wire (
*
1).
•
Adjust the output voltage difference of each Power Supply to 100 mV
or less or 1% or less of the rated output voltage, whichever is smaller,
using the output voltage adjuster (V. ADJ).
During parallel operation, load current may be biased to one side,
resulting in damage to internal components.
•
Parallel operation is used to increase static capacity. The output
voltage may drop with sudden load fluctuations.
•
There may be steps in the rising waveform of the output voltage
during parallel operation.
•
Remove the standard supplied connector and prepare a connector
separately.
Backup operation
Backup operation is possible. (Requires an external diode.)
The same model should be used for power supplies A and B.
•
The output voltages of power supplies A and B output should be
set higher only by a value equivalent to the drop in diode D
1
and D
2
forward voltages (V
F
).
In addition, since power loss occurs resulting from power supply
output current (I
OUT
)
×
diode forward voltage (V
F
), the diode should
be cooled to ensure that its temperature is kept at the value
indicated in the catalog or lower.
•
Since power loss occurs due to load power and the diode, care
should be exercised to ensure that the rated power (Rated output
voltage
×
rated output current) for one power supply is not
exceeded.
•
For backup operation, do not connect the CB and CBG terminals
on S8JX-P-series 300-W or 600-W models.
In Case There Is No Output Voltage
The possible cause for no output voltage may be that the overcurrent
or overvoltage protection has operated. The internal protection may
operate if a large amount of surge voltage such as a lightening surge
occurs while turning ON the Power Supply.
In case there is no output voltage, please check the following points
before contacting us:
•
Checking overcurrent protected status:
Check whether the load is in overcurrent status or is short-
circuited. Remove wires to load when checking.
•
Checking overvoltage or internal protection:
Turn the power supply OFF once, and leave it OFF for at least
7 minutes for S8JX-G series and 3 minutes for S8JX-P series.
Then turn it ON again to see if this clears the condition.
There is a possibility that functions such as over-current protection,
over-voltage protection or overheating protection are functioning. In
addition, other possible causes include stoppage of the built-in fan
and the remote control function (OFF). Please check the following 5
points and, if there is still no output voltage, contact your OMRON
sales representative.
Method of Checking Over-current Protection
•
Check (after removing load line) whether or not the load is in over-
current status (including short circuits).
Method of Checking Over-voltage Protection
•
Switch off the input power supply, and switch back on after at least
3 minutes have elapsed.
•
Check whether or not the +S and -S terminals are open.
Method of Check Overheating Protection
•
Switch off the input power supply and switch back on after allowing
sufficient time for cooling.
Checking for Built-in Fan Stoppage
•
Check whether or not the built-in fan has stopped. The fan is a
replaceable component.
Checking the Remote Control Function
•
Check whether or not the +RC and -RC terminals are in open
status. Carry out the regulated connections.
S 8 JX-P Series 300-/600-W Models
•
Type: Schottky Barrier diode
•
Withstand voltage (VRRM): Equivalent to or higher than the rated
power supply output voltage
•
Forward current (IF): Double the rated power supply output
current or higher
S 8 JX
C N
CB CBG
+ V
– V
AC(L)
AC( N )
S 8 JX
C N
CB CBG
+ V
– V
AC(L)
AC( N )
*
1
+ V
A
B
D
1
D
2
- V
+ V
- V
Load
S 8 JX-G Series
S 8 JX-P Series 50-/100-/150-W Models
S 8 JX-P Series 300-/600-W Models