参数资料
型号: 20IMX15-0503-8R
厂商: POWER-ONE INC
元件分类: 电源模块
英文描述: 2-OUTPUT 11.3 W DC-DC REG PWR SUPPLY MODULE
封装: 2 INCH X 1.600 INCH, 10.50 MM HEIGHT, PACKAGE-9
文件页数: 10/19页
文件大小: 177K
代理商: 20IMX15-0503-8R
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Edition 1/01.2002
18/20
Table 17: Insulation concept leading to an SELV output circuit
Conditions
Front end
DC-DC converter
Result
Supply
Minimum required grade
Maximum
Minimum required
Type
Measures to achieve the
Safety status of
voltage
of isolation, to be provided DC output
safety status of the
specified safety status of
the DC-DC
by the AC-DC front end,
voltage
front end output
the output circuit
converter output
including mains supplied
from the
circuit
battery charger
front end 1
Mains
Operational (i.e. there is
≤150 V
Primary
IMY 15
Double or reinforced
SELV circuit
≤150 V AC no need for electrical iso-
insulation, based on
lation between the mains
150 V AC and DC (pro-
supply voltage and the
vided by the DC-DC
DC-DC converter input
converter)
voltage)
Mains
Basic
≤60 V
Earthed SELV circuit 2 IMX 15
Operational insulation
≤250 V AC
IMY 15
(provided by the DC-DC
converter)
≤75 V
Hazardous voltage
IMX 15
Input fuse 3 output sup-
Earthed SELV
secondary circuit
pressor diodes 4, and
circuit
earthed output circuit 2
≤150 V
IMY 15
Supplementary insulation
SELV circuit
based on 250 V AC and
double or reinforced
insulation, based on the
maximum rated output
voltage from the front end
(provided by the DC-DC
converter)
Double or reinforced
≤60 V
SELV circuit
IMX 15
Operational insulation
IMY 15
(provided by the DC-DC
converter)
≤75 V
Double or reinforced
IMX 15
Supplementary insulation
insulated unearthed
based on the maximum
hazardous voltage
rated output voltage from
secondary circuit 5
the front end (provided by
the DC-DC converter)
≤120 V
TNV-2 circuit
IMY 15
Double or reinforced
≤150 V
Double or reinforced
insulation, based on the
insulated earthed or
maximum rated output
unearthed hazardous
voltage from the front end
voltage secondary
(provided by the DC-DC
circuit
converter)
Safety of operator accessible output circuit
If the output circuit of a DC-DC converter is operator acces-
sible, it shall be an SELV circuit according to the IEC/EN
60950 related safety standards
The following table shows some possible installation con-
figurations, compliance with which causes the output circuit
of the DC-DC converter to be an SELV circuit according to
IEC/EN 60950 up to a configured output voltage (sum of
nominal voltages if in series or +/– configuration) of 42 V.
However, it is the sole responsibility of the installer to en-
sure the compliance with the relevant and applicable safety
regulations. More information is given in:
Technical Infor-
mation: Safety.
1 The front end output voltage should match the specified input
voltage range of the DC-DC converter.
2 The earth connection has to be provided by the installer accord-
ing to the relevant safety standard, e.g. IEC/EN 60950.
3 The installer shall provide an approved fuse (type with the low-
est rating suitable for the application) in a non-earthed input
conductor directly at the input of the DC-DC converter (see fig.:
Schematic safety concept). For UL’s purpose, the fuse needs to
be UL-listed. See also:
Input Fuse.
4 Each suppressor diode should be dimensioned in such a way,
that in the case of an insulation fault the diode is able to limit the
output voltage to SELV (<60 V) until the input fuse blows (see
fig.:
Schematic safety concept).
5 Has to be insulated from earth by at least basic insulation ac-
cording to the relevant safety standard, based on the maximum
output voltage from the front end.
AC-DC
front
end
DC-DC
con-
verter
Mains
Fuse
Battery
Earth
connection
Suppressor
diode
SELV
Earth
connection
+
~
10004
Fig. 27
Schematic safety concept. Use fuse, suppressor diode
and earth connection as per table Safety concept leading
to an SELV output circuit
.
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