KSwitch D3 Unmanaged Fast Ethernet Switch - Preliminary User Guide, Rev. 0.9
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7.5.
Power Specification
The switch supports dual external DC power supplies. The external DC power supplies used must fulfill the specified
electrical ratings in this user guide and comply with the safety requirements of UL/IEC 62368-1.
Table 10: Electrical Specification
Power
10-port
16-port
24-Port (on-request)
Input
Power Terminal
Dual power inputs, 6-pin DC terminal block
Voltage Range
12 VDC to 58 VDC
Current
1.25 A max.
Power Consumption
typ. 15 W – 18 W
Protection
Reverse power protection
Only connect the switch to an external power supply providing the voltage type (AC or DC)
and the input power (max. current) specified on the Kontron Product Label and meeting the
requirements of the Limited Power Source (LPS) and Power Source (PS2) of UL/IEC 62368-1.
Before connecting to power connect the ground cable to the ground connector and ensure
that the installation sites ground meets the grounding requirements specified in your local,
national and international region.
The DC power supply must be connected to a well-fused power source.
To protect the switch and any connected peripherals, a sufficient dimensioning of the power
cable wires must be selected – according to the maximum electrical specifications on the
product label – as stipulated by EN62368-1 .
When attaching power wires to the DC terminal block’s power contacts consider:
•
DC terminal block pitch, 5.08 mm
•
Wire size range: Solid wire: 12~24 AWG and Stranded wire: 12~24 AWG
•
Wire length 3 m (9.84 ft.) maximum
•
Wire strip length 7 mm (0.28 in)
After a brownout condition the used power supply must remain in the “off state” long
enough to allow all internal voltages to discharge sufficiently. Failure to observe this
required “off state” time may mean that parts of the switch or peripherals work incorrectly
or suffer a reduction of MTBF. The minimum “off state” time, to allow internal voltages to
discharge sufficiently, is dependent on the power supply and additional electrical factors. To
determine the required “off state” time, each case must be considered individually. For more
information, contact Kontron Support.
