GarrettCom MAGNUM 6KQE - Manual (Page 45)

Magnum 6KQE Managed Edge Switch Installation and User Guide 02/09
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APPENDIX B : DC Power Input
B1.0
Specifications for Magnum 6KQE Switches, DC Power at 12, 24,
–48, 125 and 250VDC Power input
Each Magnum Model 6KQE Managed Switch requires DC power input, at 12,
24, 48, 125 and 250VDC nominal. The wide range of DC power input types qualifies this
product for use in 12, 24, 48, 125 and 250VDC applications in different industries.
DC Power Terminals: “+”, “ - ” are internally floating so that user may ground either
GND: ground wire connection to the 6KQE chassis screw
Fig B1.0 Location of chassis ground
Power Consumption:
20 watts typical (for a fully loaded fiber model with 2Gb)
15 watts typical (for 8 ports, copper and 100Mb fiber)
12VDC Power Input nominal (range 8 to 18VDC)
24VDC Power Input nominal (range 18 to 36VDC)
-48VDC Power Input nominal (range 36 to 60VDC)
125VDC Power Input nominal (range 88 to 150VDC)
250VDC Power Input nominal (range 160 to 300VDC)
Standard 6KQE DC Power Input Terminal Block : “ -, GND, + ”
See also Section 1.0, Technical Specifications, for the 6KQE base unit
B2.0
12, 24, –48, 125 and 250VDC POWER, THEORY OF OPERATION
The 12, 24, -48VDC,
125 and 250VDC power options
are designed using diodes inside
on each DC power input line
behind the two external power
connection terminals, so that the
power from an external source can
only flow into the hub. This
allows the Switch to operate only whenever DC power is correctly applied to the two
inputs. It protects the Switch from incorrect DC input connections. An incorrect polarity