IML10 查看數據表（PDF） - Unspecified

零件编号

产品描述 (功能)

生产厂家

IML10

10 Watt DC-DC Converters

Unspecified 

Board Mountable

DC-DC Converters

IML 10 Series

Table 6: Insulation concept leading to an SELV output circuit

Conditions Front end

DC-DC converter

Result

Supply

voltage

Minimum required grade Maximum

of isolation, to be provided DC output

by the AC-DC front end, voltage

including mains supplied from the

battery charger

front end 1

Minimum required safety

status of the front end

output circuit

Measures to achieve the

specified safety status of the

output circuit

Safety status of

the DC-DC

converter output

circuit

Mains

Basic

≤250 V AC

≤60 V

Earthed SELV circuit 2

Operational insulation, pro- SELV circuit

vided by the DC-DC converter

>60 V

ELV circuit

Hazardous voltage

secondary circuit

Input fuse 3 output suppressor

diode(s) 4, and earthed

output circuit(s) 2

Earthed SELV

circuit

Double or reinforced

≤60 V

SELV circuit

Operational insulation, pro- SELV circuit

vided by the DC-DC converter

>60 V

TNV-2 circuit

Double or reinforced insu-

lated unearthed hazardous

voltage secondary circuit 5

Supplementary insulation,

based on the maximum input

voltage, provided by the

DC-DC converter

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 according to the relevant safety standard, e.g. IEC/EN 60950.

3 The installer shall provide an approved fuse (type with the lowest rating suitable for the application) in the non-earthed input line di-

rectly 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 basic insulation according to the relevant safety standard, based on the maximum output voltage

from the front end.

~

Mains

~

AC-DC

front

end

Fuse

DC-DC

Battery con-

verter

10004

+

Suppressor

diode SELV

–

Earth

Earth

connection

connection

Fig. 6

Schematic safety concept. Use fuse, suppressor diode

and earth connection as per table: Safety concept leading

to an SELV output circuit.

Edition 6/4.2000

6/7

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