Data Sheet
JRW017-070 Series Power Modules DC-DC Converters
36-75Vdc Input; 1.2Vdc to 12Vdc Output
July 21, 2008
Safety Considerations (continued)
*Note: -60V dc nominal battery plants are not
available in the U.S. or Canada.
For all input voltages, other than DC MAINS, where
the input voltage is less than 60V dc, if the input
meets all of the requirements for SELV, then:
The output may be considered SELV. Output
voltages will remain within SELV limits even
with internally-generated non-SELV voltages.
Single component failure and fault tests were
performed in the power converters.
One pole of the input and one pole of the
output are to be grounded, or both circuits are
to be kept floating, to maintain the output
voltage to ground voltage within ELV or SELV
limits.
For all input sources, other than DC MAINS, where
the input voltage is between 60 and 75V dc
(Classified as TNV-2 in Europe), the following must
be meet, if the converter’s output is to be evaluated
for SELV:
The input source is to be provided with
reinforced insulation from any hazardous voltage,
including the ac mains.
One Vi pin and one Vo pin are to be reliably
earthed, or both the input and output pins are to
be kept floating.
Another SELV reliability test is conducted on
the whole system, as required by the safety
agencies, on the combination of supply source
and the subject module to verify that under a
single fault, hazardous voltages do not appear at
the module’s output.
The power module has ELV (extra-low voltage)
outputs when all inputs are ELV.
All flammable materials used in the manufacturing of
these modules are rated 94V-0.
The input to these units is to be provided with a
maximum 20A fast-acting (or time-delay) fuse in the
unearthed lead.
LINEAGE POWER
14
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
