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参数资料
| 型号： | PSA5A2-2 |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封装： | METAL, CASE A01, MODULE |
| 文件页数： | 9/10页 |
| 文件大小： | 411K |
| 代理商： | PSA5A2-2 |
Chassis Mountable
Switching Regulators
PSA Series
Edition 5/5.2000
8/10
Safety of Operator Accessible Output Circuit
If the output circuit of a switching regulator is operator-ac-
cessible, it shall be an SELV circuit according to IEC/EN
60950 related safety standards
The following table shows some possible installation con-
figurations, compliance with which causes the output cir-
cuit of the switching regulator to be an SELV circuit ac-
cording to IEC/EN 60950 up to a nominal output voltage of
30 V.
However, it is the sole responsibility of the installer or user
to assure the compliance with the relevant and applicable
safety regulations.
More information is given in:
Technical Information: Safety
& EMC.
Standards and Approvals
All switching regulators are UL recognized according to UL
1950, UL 1012 and EN 60950, UL recognized for Canada
to CAN/CSA C22.2 No. 234-M90 and SEV approved to
IEC/EN 60950 and EN 55014 standards.
The units have been evaluated for:
Building in,
Operational insulation from input to output and input/
output to case,
The use in an overvoltage category II environment,
The use in a pollution degree 2 environment.
The switching regulators are subject to manufacturing sur-
veillance in accordance with the above mentioned UL and
CSA and with ISO 9001 standards.
Table 8: Insulation concept leading to an SELV output circuit
Conditions
Front end
Switching regulator
Result
Supply
Minimum required grade
Maximum
Minimum required safety
Measures to achieve the
Safety status of
voltage
of isolation, to be provided DC output
status of the front end
specified safety status of the
the switching
by the AC-DC front end,
voltage
output circuit
regulator output
including mains supplied
from the
circuit
battery charger
front end 1
Battery
Double or Reinforced
≤60 V
SELV circuit
None
SELV circuit
supply,
considered
as secon-
dary circuit
Mains
Basic
≤60 V
Earthed SELV circuit 2
None
Earthed SELV
≤250 V AC
ELV circuit
Input fuse 3 and earthed output
circuit
circuit 2 and earthed 2 or non
accessible case 4
Double or reinforced
≤60 V
SELV circuit
None
SELV circuit
1 The front end output voltage should match the specified input voltage range of the switching regulator.
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 (slow blow type with the lowest current rating suitable for the application, max. 12.5 A)
in a non-earthed input conductor directly at the input of the switching regulator. If Vo+ is earthed, insert the fuse in the Gi- line. For
UL’s purpose, the fuse needs to be UL-listed. If option C is fitted, a suitable fuse is already built-in in the Vi+ line.
4 Has to be insulated from earth by double or reinforced insulation according to the relevant safety standard, based on the maximum
output voltage from the front end.
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