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参数资料
| 型号： | LHR2020-2 |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT 10 W AC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 10/10页 |
| 文件大小： | 230K |
| 代理商： | LHR2020-2 |
Board Mountable
AC-DC Converters
LHR, LGR Series
Edition 6/5.2000
9/10
Safety and Installation Instructions
Connector pin Allocation
The connector pin allocation table defines the electrical
potentials of the AC-DC converters. For mechanical posi-
tions of pins see:
Mechanical Data.
Table 9: Connector pin allocation and designation
Pin Electrical
LHR
LGR
no.
determination
Single Dual
Dual
+/–
+/+
1
Input voltage
L
2
Input voltage
N
3
Output voltage
Vo+
Vo1+
(positive)
4
Output voltage
-
Vo–
--
(return potential)
Output voltage
-
Com
(common return)
Control input
Trim
-
5
Output voltage
-
Vo–
-Vo–
Vo2+
(negative or
positive)
Output voltage
Vo–
--
(return potential)
Control input
-
Trim
-
6
Output voltage
n.c.
Com
-
Installation Instructions
The LHR and LGR-families of DC-DC converters are com-
ponents, intended exclusively for inclusion within other
equipment by an industrial assembly operation or by pro-
fessional installers. Installation must strictly follow the na-
tional safety regulations in compliance with the enclosure,
mounting, creepage, clearance, casualty, markings and
segregation requirements of the end-use application. See
also:
Technical Information: Installation and Application.
Connection to the system shall be made via a printed cir-
cuit board according to
Connector pin allocation and Me-
chanical Data. Check for hazardous voltages before alter-
ing any connections.
Ensure that a unit failure (e.g. by an internal short-circuit)
does not result in a hazardous condition. See also:
Safety
of operator accessible output circuit.
To prevent excessive current flowing through the input
supply lines in case of a short-circuit across the converter
input, an external fuse suitable for the application and in
compliance with the local requirements should be installed
in the wiring to one or both input pins (no. 1 and/or no. 2).
We recommend a slow-blow fuse T1.25A for LHR types,
T2.0A for LGR types.
Important: Do not open the modules, or guarantee will
be invalidated.
Make sure that there is sufficient air flow available for con-
vection cooling. This should be verified by measuring the
case temperature when the unit is installed and operated
in the end-use application. The maximum specified case
temperature
TC max shall not be exceeded. See also: Ther-
mal Considerations.
Cleaning Agents
In order to avoid possible damage, any penetration of liq-
uids (e.g. cleaning fluids) is to be prevented, since the
power supplies are not hermetically sealed.
Standards and approvals
LHR and LGR AC-DC converters correspond to class II
equipment. All types are UL recognized according to UL
1950, UL recognized for Canada to CAN/CSA C22.2 No.
950-95 and LGA approved to IEC/EN 60950 standards.
The units have been evaluated for:
Building in
Double or reinforced insulation between input and out-
put, based on 250 V AC
Operational insulation between the outputs (common
return)
The use in a pollution degree 2 environment
Connecting the input to a primary circuit with a
maximum transient rating of 2500 V (overvoltage cat-
egory III based on a 110 V primary circuit, overvoltage
category II based on a 230 V primary circuit).
The AC-DC converters are subject to manufacturing sur-
veillance in accordance with the above mentioned UL,
CSA, EN and with ISO 9001 standards.
Isolation
The electric strength test is performed as a factory test in
accordance with IEC/EN 60950 and UL 1950 and should
not be repeated in the field. Power-One will not honour
any guarantee/warranty claims resulting from electric
strength field tests.
Table 10: Isolation
Characteristic
Input to
Unit
output
Electric strength
Required according to
3.0
kVrms
test voltage
IEC/EN 60950
4.2
kV DC
Actual factory test 2 s
3.0
kVrms
Typical coupling
LHR
≈2.4
nF
capacitance
LGR
≈ 5.0
Insulation resistance at 500 V DC
>300
M
1 For creepage distances and clearances refer to Technical
Information: Safety.
Protection Degree
Condition: Mounted on a PCB. IP 40: All units.
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