psb246-2ir Power-One, psb246-2ir Datasheet - Page 7

• Manufacturer Part Number: psb246-2ir
• Description: Psb Series Extended Positive Switching Regulators Benign
• Manufacturer: Power-One

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 circuit
of the switching regulator to be an SELV circuit according to
IEC/EN 60950 up to a nominal output voltage of 30 V.
Table 8: Insulation concept leading to an SELV output circuit
1
2
3
4
Standards and Approvals
All switching regulators are UL recognized according to UL
1950, UL 1012 and EN 60950 and UL recognized for
Canada to CAN/CSA C22.2 No. 234-M90.
The units have been evaluated for:
• Building in,
• Operational insulation from input to output and input/out-
• The use in an overvoltage category II environment,
• The use in a pollution degree 2 environment.
REV. OCT 17, 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 earth connection has to be provided 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.
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
by the AC-DC front end,
including mains supplied
battery charger
Double or Reinforced
Basic
Double or reinforced
Maximum
voltage
from the
front end
60 V
60 V
60 V
1
status of the front end
Minimum required safety
output circuit
SELV circuit
Earthed SELV circuit
ELV circuit
SELV circuit
Page 7 of 10
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 .
Positive Switching Regulators (Benign)
The switching regulators are subject to manufacturing sur-
veillance in accordance with the above mentioned UL and
CSA and with ISO 9001 standards.
Isolation
Electric strength test voltage between input interconnected
with output and case: 500 V DC, 1 s.
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.
2
PSB Series Extended Data Sheet
Switching regulator
Measures to achieve the
specified safety status of the
output circuit
None
None
Input fuse
circuit
case
None
4
2
and non accessible
3
and earthed output
Result
Safety status of
the switching
regulator output
SELV circuit
Earthed SELV
circuit
SELV circuit
circuit