Safety
Electrical Data
The PKF 4117 ASI DC/DC power module meets the
requirements of
Fundamental circuit diagram, Single output
UL/EN 60 950, Safety of information technology equipment
including electrical business equipment. The PKF power modules
are recognized by UL and meet the applicable requirements in
UL 1950 Safety of information technology equipment, the applicable
Canadian safety requirements and UL 1012 Standard for power
supplies.
The DC/DC power module shall be installed in an end-use
equipment and considerations should be given to measuring
the case temperature to comply with TCmax when in operation.
Abnormal component tests are conducted with the input
protected by an external 15 A fuse. The need for repeating these
tests in the end-use appliance shall be considered if installed in
a circuit having higher rated devices.
When the supply to the DC/DC power module meets all the
requirements for SELV (<60Vdc), the output is considered
to remain within SELV limits (level 3). The isolation is an
operational insulation in accordance with EN 60950.
The DC/DC power module is intended to be supplied by
isolated secondary circuitry and shall be installed in compliance
with the requirements of the ultimate application. If they are
connected to
Transient input voltage
a 60 V DC system reinforced insulation must be provided
in the power supply that isolates the input from the mains.
Single fault testing in the power supply must be performed in
combination with the DC/DC power module to demonstrate
that the output meets the requirement for SELV. One pole of
the input and one pole of the output is to be grounded or both
are to be kept floating. The terminal pins are only intended for
connection to mating connectors of internal wiring inside the
end-use equipment.
These DC/DC power modules may be used in telephone
equipment in accordance with paragraph 34 A.1 of UL 1459
(Standard for Telephone Equipment, second edition).
The galvanic isolation is verified in an electric strength test.
Test voltage (VISO) between input and output is 1,500 Vdc for
60 s. In production the test duration may be decreased to 1 s.
The capacitor between input and output has a value of 1nF and
the leakage current is less than 1µA @ 53 Vdc.
Single voltage pulse at +25°C ambient temperature.
The case is designed in non-conductive epoxy. Its flammability
rating meets UL 94V-0. The oxygen index is 34%.
PKF 4117A SI Datasheet EN/LZT 146 041 R1A ©Ericsson Power Modules AB, December 2003
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