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参数资料
| 型号： | LM2540-9ERD6H |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT 50 W AC-DC REG PWR SUPPLY MODULE |
| 封装： | METAL, CASE M02, MODULE |
| 文件页数： | 8/24页 |
| 文件大小： | 982K |
| 代理商： | LM2540-9ERD6H |
Cassette Style
AC-DC Converters
M Series
Edition 5/5.2000
16/24
Standards and approvals
LM AC-DC converters correspond to class I equipment,
while LMZ types 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,
Supplementary insulation between input and case,
based on 250 V AC and 400 V DC (class I equipment)
Double or reinforced insulation between input and case,
based on 250 V AC and DC (class II equipment)
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.
Double or reinforced insulation between input and out-
put, based on 250 V AC and 400 V DC
Operational insulation between output(s) and case
Operational insulation between the outputs
The use in a pollution degree 2 environment
Connecting the input to a primary or secondary circuit
with a maximum transient rating of 2500 V (overvoltage
category III based on a 110 V primary circuit, overvolt-
age 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.
Important: Testing by applying AC voltages will result in
high and dangerous leakage currents flowing through
the Y-capacitors (see fig.:
Block diagram).
Table 16: Isolation
Characteristic
Input to
Output to Output to Output to
Unit
case
output
case
output
class I
class II
class I
class II
option H
Electric
Required according to
1.5
3.0
3.0 1
3.0
0.5
-
kVrms
strength
IEC/EN 60950
2.1
4.2
4.2 1
4.2
0.7
-
kV DC
test voltage
Actual factory test 1 s
2.8
5.6
5.6 1
5.6
1.4
2.8
0.3
AC test voltage equivalent
2.0
4.0
4.0 1
4.0
1.0
2.0
0.2
kVrms
to actual factory test
Insulation resistance at 500 V DC
>300
>100 2
M
1 In accordance with IEC/EN 60950 only subassemblies are tested in factory with this voltage.
2 Tested at 300 V DC.
For creepage distances and clearances refer to:
Technical Information: Safety.
Protection Degree
Condition: Female connector fitted to the unit.
IP 40: All units, except those with options P, A or K, and
except those with option D or V with potentiometer.
IP 30: All units fitted with options A or K, except those with
option P, and except those with option D or V with
potentiometer.
IP 20: All units fitted with option P, or with option D or V
with potentiometer.
Leakage Currents in AC-DC operation
Leakage currents flow due to internal leakage capacitance
and RFI suppression Y-capacitors. The current values are
proportional to the mains voltage and nearly proportional to
the mains frequency and are specified at an input voltage of
264 V (50 Hz) where phase, neutral and protective earth
are correctly connected as required for class I equipment.
Under test conditions the leakage current flows through a
measuring instrument (MI) as described in fig.:
Measuring
instrument for earth leakage current tests, which takes into
account impedance and sensitivity of a person touching
unearthed accessible parts. The current value is calculated
by dividing the measured voltage by 500
. If inputs and/or
outputs of M-units are connected in parallel, their individual
leakage currents are added.
V
MI
500
1500
10 k
220 nF
22 nF
10061
Fig. 18
Measuring instrument (MI) for earth leakage current tests
according to IEC/EN 60950.
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