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参数资料
| 型号： | LK2540-9PD4 |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT 150 W AC-DC REG PWR SUPPLY MODULE |
| 封装： | HEAT SINK, METAL, CASE K02, MODULE |
| 文件页数： | 21/27页 |
| 文件大小： | 640K |
| 代理商： | LK2540-9PD4 |
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K-Family
DC-DC Converters >100 W
Rugged Environment
8 - 4
Edition 2/96 - Melcher AG
MELCHER
The Power Partners.
8.1
Safety and Installation Instructions
Safety:
For safety reasons, the power supplies should be wired
via the female connector H15 or H15 S4 (according to
DIN 41612, see "Accessories") in order to meet national
and international safety requirements.
If the output circuit of a DC-DC converter is operator-acces-
sible according to the IEC 950 related safety standards, it
shall be an SELV circuit (Safety Extra Low Voltage circuit,
i.e. a circuit, separated from mains by at least basic insula-
tion, that is so designed and protected that under normal
and single fault conditions, the voltage between any two
conductors and between any conductor and earth does not
exceed 60 V DC).
In the following section an interpretation is provided of the
IEC 950 safety standard with respect to the safety status of
the output circuit. However, it is the sole responsibility of
the installer or user to assure the compliance with the rel-
evant and applicable safety standards.
If table below is observed, the output of a DC-DC converter
is considered to be an SELV circuit up to a nominal output
voltage of 36 V.
The converters correspond to safety class I equipment and
comply with IEC 950, EN 60950, VDE 0805 Part 100 (in-
cluding manufacturing surveillance), UL 1950, CSA C22.2
No. 950-95 and are VDE approved.
The connector has a leading earth connection pin which
ensures earth connection prior to any other.
The UL 1950 recognition limits the ambient operational
temperature range of the standard modules (-7) to
–25...50
°C. In applications where the full operational tem-
perature range of –25...71
°C under UL condition is re-
quired, forced cooling should be provided. The European
approval boards have in contrast accepted the converters
to be operated up to
T
A max
without any further precautions.
Installation Instructions
Installation must strictly follow the national safety regula-
tions. Pin 24 has to be connected to earth. A second fuse
should be installed in the wiring to pins 26/28 if:
– Local requirements demand an individual fuse in each
source line
– Input to protective earth impedance is high or undefined
– Phase and neutral of the mains are not defined (AC-DC
converters).
In applications where the inhibit function is not used, the
inhibit pin should be connected to the S– pin (K 1000) or
the Vo1– pin (K 2000) to enable the outputs.
Table 2: Insulation concept
Converter Nominal Minimum required grade of
Maximum Minimum required safety
Minimum required grade Resulting
type
mains
isolation, to be provided by output
status of the front end
of isolation between the
safety
supply
the AC-DC front end,
voltage
output circuit
input and the output
status
voltage
including mains supplied
from the
provided by the
of the
(AC)
battery charger
front end
the DC-DC converter
DC-DC
output
AK, BK
≤150V
Operational
≤100 V
Primary circuit
Double or reinforced,
SELV
based on
circuit
AC 150 V and DC 100 V
≤250V
Basic
≤100 V
Hazardous voltage
Double or reinforced,
secondary circuit
based on
(earthed or unearthed)
AC 250 V and DC 100 V
CK, DK,
≤250V
Operational
≤400 V
Primary circuit
Reinforced, based on
EK, FK,
AC 250 V and DC 400 V
LK
Important Advice
Electric strength tests should not be repeated in the field. Improper test methods, for example overshooting or oscillating
test voltages, voltage slopes exceeding 1 kV/
s, internal Y-capacitors not carefully discharged, etc. can cause severe
damage to switching devices and ICs. Melcher AG will not honour any guarantee/warranty claims resulting from high
voltage field tests.
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