psa241.5-7ir Power-One, psa241.5-7ir Datasheet - Page 11

• Manufacturer Part Number: psa241.5-7ir
• Description: Psa Series Extended Positive Switching Regulator Rugged
• Manufacturer: Power-One

Standards and Approvals
All switching regulators are UL recognized according to
UL 1950 and EN 60950 and UL recognized for Canada to
CAN/CSA C22.2 No. 234-M90.
The units have been evaluated for:
• Building in,
• Functional insulation from input to output and input/out-
• 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 9: Safety concept leading to an SELV output circuit
1
2
3
4
5
Protection Degree
The protection degree is IP 40, IP 20 with option P.
Isolation
Electric strength test voltage between input intercon-
nected with output and case: 1500 V DC, 1 s.
REV. SEP 23, 2003
Conditions Front end
Supply
voltage
Battery
supply,
considered
as secon-
dary circuit
Mains
-250 V AC
The front end output voltage should match the specified input voltage range of the switching regulator.
The conductor to the Gi– terminal of the switching regulator has to be connected to earth by the installer according to the relevant
safety standard, e.g. IEC/EN 60950.
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.
The earth connection has to be provided by the installer according to the relevant safety standard, e.g. IEC/EN 60950.
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.
put to case,
Minimum required grade
of isolation, to be provided DC output status of the front end
Double or Reinforced
by the AC-DC front end,
including mains-supplied from the
battery charger
Basic
Double or reinforced
Maximum
voltage
front end
60 V
60 V
60 V
60 V
60 V
60 V
1
Minimum required safety
output circuit
secondary circuit
Unearthed hazardous
voltage secondary circuit
Hazardous voltage
secondary circuit
ELV circuit
secondary circuit
lated unearthed hazardous and non accessible case
voltage secondary circuit
SELV circuit
Earthed hazardous voltage Input fuse
Earthed SELV circuit
Hazardous voltage
SELV circuit
Double or reinforced insu-
Page 11 of 13
Positive Switching Regulator (Rugged)
This test is performed as 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 claims
resulting from electric strength field tests.
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.
2
4
PSA Series Extended Data Sheet
5
5
Switching regulator
Measures to achieve the
specified safety status of the
output circuit
None
non accessible case
Input fuse
non accessible case
Input fuse
circuit
accessible case
None
Input fuse
circuit
accessible case
None
Input fuse
4
4
and non
and non
3
3
3
3
3
and earthed output Earthed SELV
and
and unearthed,
and earthed output
and unearthed
5
5
5
5
5
Result
Safety status of
the switching
regulator output
circuit
SELV circuit
Earthed SELV
circuit
circuit
circuit
SELV circuit
Unearthed SELV
circuit
Unearthed SELV