85
90
80
100
Input voltage [VAC]
Load f
actor [%]
Fig.4.3 Derating curve depends on input voltage
4.2 Installation method
¡
Mounting method
(D)
(A)
(B)
(C)
(F)
(E)
CN1
CN1
CN1
Standard Position
CN1
CN1
CN1
Fig.4.4 Mounting method
¡
This power supply is manufactured by SMD technology.
Do not touch any SMD components on the unit. Be especially
careful when handling.
¡
If using a metal chassis, keep proper insulation between the
component and metal chassis, use the spacer of 10mm or more
between bottom of power supply and metal chassis.
If d
1
and/or d
2
are less than the value mentioned in Fig.4.5, insert
an insulating sheet with reinforced insulation between the power
supply unit and metal chassis.
The following distance is not satisfactory for cooling condition.
Please refer to section 4.1 for cooling method.
d
1
=10mm min
d
2
d
2
d
2
d
2
d
2
CN1
d
2
=6mm min
CN1
Fig.4.5 Installation method
¡
There is a possibility that it is not possible to cool enough when
the power supply is used by the sealing up space as showing in
Figure 4.6.
Please use it after confirming the temperature of points
1
through
5
of section 4.1.
Power Supply
Case
Fig.4.6 Installation example
4.3 Mounting screw
¡
The mounting screw should be M3. The hatched area shows the
allowance of metal parts for mounting.
8
8
8
8
8
8
8
8
CN1
CN2
CN3
FG
Fig.4.7 Allowance of metal for mounting
¡
If the power supply unit is fixed with metal parts from the top side,
make sure not to make contact with any components on the unit.
¡
This power supply is manufactured by SMD technology.
The stress to PCB like twisting or bending causes defects to the
unit, so handle the unit with care.
4.4 Ground
¡
When installing the power supply with your unit, ensure that the
input FG terminal or mounting hole FG is connected to safety
ground of the unit. However when applying the safety agency,
connect the input FG terminal to safety ground of the unit.
*
It is recommended to electrically connect FG to metal chassis for
reducing noise.
4.5 Expectancy life and warranty
¡
Expectancy life
Table 4.2 Expectancy life
Installation
condition
Cooling
Method
Average ambient
temperature (yearly)
Expectancy Life [years]
Po
[
75
％
75
％
<Po
[
100
％
A
Convection
Ta=40
C
or less
6
6
Ta
=
50
C
6
4
B
，
D
Ta
=
30
C
or less
6
6
Ta
=
40
C
6
4
C
，
E
Ta
=
25
C
or less
6
6
Ta
=
35
C
6
4
F
Ta
=
20
C
or less
6
6
Ta
=
30
C
6
4
A,B,C,D,E,F Forced air Ta
=
50
C
or less
6
6
Ta
=
60
C
6
4
Remarks :
Estimated life expectancy can be calculated by point temperature
1
through
5
shown in section 4.1. Please contact us for details.
AC-DC Power Supplies Configurable Type
Instruction Manual
RB-11
