4.1 Installation method
n
n
n
n
When two or more power supplies are used side by side, position
them with proper intervals to allow enough air ventilation. Ambient
temperature around each power supply should not exceed the
temperature range shown in derating curve.
Please be carefull with that metal parts do not touch mounted
parts at front side, where major components are mounted, when
a power supply is installed with them.
The operative ambient temperature is different by with/without
case cover or mounting position. Please refer drawings as below.
Valid ambient temperature is different depending on the use of
the cover or the mounting positions. Please refer to the following
derating curve.
When unit mounted except below drawings, it is required to con-
sider ventilated environment by forced air cooling for tempera-
ture/load derating. For details, please consult our sales or engi-
neering departments.
4.2 Derating
LCA-20
When the output voltage is more than 12V.
D1 D2: Please use Schottky Barrier Diode
(b)
n
n
Parallel operation is not possible.
Redundancy operation is available by wiring as shown below.
n
n
Even a slight difference in output voltage can affect the balance
between the values of I and I .
Please make sure that the value of I does not exceed the rated
current of a power supply.
I
the rated current value
(a)
1
2
3
3
Series operation is available by connecting the output of two or
more power supplies, as shown below. Output current in series
connection should be lower than the lowest rated current in each
unit.
l
LCA50S LCA75S LCA100S LCA150S
4 Assembling and
Installation Method
(b)
n
n
Parallel operation is not possible.
Redundancy operation is available by wiring as shown below.
n
Even a slight difference in output voltage can affect the balance
between the values of I and I .
Please make sure that the value of I does not exceed the rated
current of a power supply.
I
the rated current value
1
2
3
3
LCA
I
2
I
1
I
3
-
-
+
Power
Supply
Power
Supply
+
Load
I
2
I
1
I
3
-
-
+
Power
Supply
Power
Supply
+
Load
Load
Load
Power
Supply
+
Power
Supply
-
-
+
Load
Load
Power
Supply
+
Power
Supply
-
-
+
+
-
+
-
Power
Supply
Power
Supply
Load
D1
D2
Power
Supply
+
-
Load
Power
Supply
+
-
Instruction Manual
AC-DC Power Supplies Open Frame/Enclosed type
June 29, 2011
