5 Others
5.1 Output Current Monitor
¡
You can monitor an output current by measuring a voltage be-
tween the terminal CB and COM.
¡
Fig.5.1 shows the relationship between the voltage of the terminal
CB and the output current.
The output current shown in Fig.5.1 should be used only as a
guide.
Voltage
of
CB
[V
]
Load factor [%]
Load factor :
Output current
Rated current
1
0
0
20
40
60
80
100
2
3
4
5
Fig.5.1 Load factor conversion graph
Note:
¡
Careful wire connection is needed to avoid a malfunction caused
by noise.
¡
Use a measuring instrument which has 500k
W
input impedance
or more.
¡
Do not short between CB and COM because of possibility of fail-
ure.
5.2 Auxiliary Power (AUX)
¡
The power supplies can generate an auxiliary power (AUX: 12V
0.15A) from CN1/CN2 to provide for remote ON/OFF and attached
circuits.
¡
AUX circuit is isolated from other (input, output, FG, RC, WRN
and PG) circuits.
¡
Please do not draw a current of 0.15A or higher from the auxiliary
power because doing so could damage the internal circuits or
cause malfunction.
When you connect a DC-DC converter, a current a few times
higher than normal current may flow at start-up. Please check the
current.
5.3 Output Capacitive Load Considerations
¡
Please see Table 5.1 for maximum value of external output capac-
itance.If the external output capacitance exceeds the value shown
in Table 5.1, please contact us for details.
Table. 5.1 Maximum value of external output capacitance
Model
Maximum value of external output
capacitance [μF]
FETA7000ST-48
22,000
FETA7000ST-144
7,500
5.4 External Component (EMI/EMC Filter)
FETA7000ST can comply with FCC Part 15 class A and CIS-
PR32-A, EN55032-A, VCCI-A by connecting an external EMI/
EMC Filter.
Recommended EMI/EMC Filter:
FN3280H-25-32 (schaffner), B84131-M3-A116 (EPCOS) or equiv-
alent product.
L3
L2
L1
N
FG
EMI/EMC
FILTER
LOAD
300
-
480VAC
(3
f
4-Wire)
DC OUT +
DC OUT -
L3
L2
L1
N
FG
FETA7000ST
Fig.5.2 Connecting EMI/EMC Filter
5.5 Ground
¡
When installing the power supply with your unit, ensure that the
input FG terminal is connected to safety ground of the unit.
5.6 Variable Speed Fan
¡
The power supply has built-in variable speed cooling fan. The fan
speed is a function of load and ambient temperature.
AC-DC Power Supplies Enclosed Type
Instruction Manual
FETA-15
