Acceptance Mark
NEWS
2013-08-19
20130819 Safety Information
DC input power supply application UL60950-1 Precautions

Suitable for DC mains (DC MAINS SUPPLY) DC input power supplies because of large differences

in
the specifications of the input voltage, it can be based on the total DC power supply (DC MAINS

SUPPLY)
have different voltage insulation design considerations. Summarized as follows:

1.
Need to give priority to the total DC power (DC MAINS SUPPLY) Supply Voltage (Operating Voltage)

   and
float voltage (floating Voltage), regardless of the DC input power supply voltage marked values ​​

   indicated
why. For example, if the input power supply is labeled as -60 V dc, according to IEC TR62102,

   DC Total Power (DC MAINS SUPPLY) Supply Voltage (Operating Voltage) should be -75 V dc.

2.
If the input voltage is less than 60V, simply enter as SELV, for output to stay Functional insulation,

   and reference the relevant requirements.

3.
If the input voltage range of 60V-80V, to enter as TNV-2, for output to stay Basic insulation, and

   reference the
relevant requirements.

4.
If the input voltage is higher than 80V, to enter as a Hazardous voltage, the output should

   remain
Double insulation / Reinforced insulation.

5.
If the built-in the case of low voltage input with a large current, pay attention to use UL approved

   DC Fuse,
non-optional AC Fuse replaced.

6.
Terminal requirements shall comply with the requirements of Section 3.2.1.2