KSwitch D3 UMP Unmanaged PoE Ethernet Switch - User Guide, Rev. 1.0
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7.5.
Power Specification
The switch supports dual external DC power supplies. The external DC power supplies must fulfill the specified
electrical ratings in this user guide, comply with the safety requirements of UL/IEC 62368-1 and be able to supply the
PDs with adequate power. Each DC power supply should be capable of providing the 250 W power budget.
Table 9: Electrical Specification
Power
10-port
Input
Power Terminal
Dual power inputs, removable 6-pin DC terminal block
Voltage (range)
24 VDC to 48 VDC
Current
0.425 A max.
Power Consumption
10 W (without PoE load)
8x 30 W, total power budget, 240 W
Protection
Transient Protection > 15, 000 W peak
Reverse Power protection
PoE
PoE Power
15.4 W / 30 W (Switch automatically detects PoE/PoE+ and powers accordingly)
Power Budget
250 W total power budget ( PDs)
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. If access to power is
restricted, guarantee disconnection using a separate cut-off device.
Input power should be within the range of 24 VDC to 48 VDC for PoE compliance and
42.5 VDC to 57 VDC for PoE+/PoE++ compliance.
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 .
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.
The DC power supply must be able to supply the PDs with adequate power.
