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Connecting DC Power
When using 48Vdc power, an external DC power supply must be connected to the DC power
connector on the left side of the front panel. DC input (DC source) must be isolated from AC mains
by reinforced insulation.
DANGER
Remove both power cords before servicing.
NOTE
To provide adequate circuit protection between the DC power supply and the switch, all intermediate
wiring and circuitry should be rated to carry a load at least two times the maximum rating for this
switch (see
NOTE
For a DC system, use a grounding wire of at least 18 American Wire Gauge (AWG). The 18 AWG wire
should be attached to an agency-approved crimp connector (provided on the chassis), and crimped
with the proper tool. The crimp connector should allow for securement to a ground screw on the
enclosure.
NOTE
Wiring for the power input terminals on the switch are described below. Wiring of the DC power
supply terminals depends on the equipment in use on the local site, but should be wired in such a
way as to meet the input requirements shown in
should also be color coded according to local standards to ensure that the input power and ground
lines can be easily distinguished.
To connect the switch to a power source:
1. First verify that the DC power can provide 48Vdc, 0.8A minimum.
2. Prepare two wires for each power source to be used. Use 18 AWG stranded copper wire. Make
3. Use a wire stripper to carefully strip about a half an inch of the outer insulation off the end of
4. Twist the copper wire strands together to form a tight braid. If possible, solder the exposed
5. Connect the external power feed and power ground/return lines to the DC plug (provided with
This equipment installation must meet NEC/CEC code requirements. Consult local authorities for
regulations.
Brocade 6910 Ethernet Access Switch Hardware Installation Guide
53-1002345-02
"Power Supply"
on page 34.)
sure these wires are not plugged into the power source.
each wire, exposing the copper core.
braid of wire together for better conductivity.
the switch) as shown in the following figure. The plugs are labeled on the front of the chassis,
above the DC power connection block. The -48 VDC power feed uses the "-48VDC" input lines.
Use a small flat-tip screwdriver to loosen the screws on the power plug and open the wire
clamps.
Connecting to a Power Source
"DC PLUG CONNECTIONS"
2
on page 16. The wiring
15
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