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I
NSTALLING THE
Connecting to a Power Source
This switch supports both AC and DC power conversion modules.
Connecting DC Power
When a -48 VDC power conversion module is installed in the switch, an
external DC power supply must be connected to the DC power
connection on the left side of the front panel.
Warning: Before wiring the DC plug or connecting power to the switch,
Notes: 1.
3-10
S
WITCH
ensure that power to the feed lines is turned off at the supply
circuit breaker or disconnected from the power bus.
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 "Power Supply" on
page C-2).
2.
The wiring between the DC power supply and the switch
must be stranded copper wire within the range of 10 to 24
AWG.
3.
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 Figure 3-7 "DC Plug Connections"
on page 3-12. The wiring should also be color coded
according to local standards to ensure that the input power
and ground lines can be easily distinguished.
4.
When using two power conversion modules with the switch,
either AC or DC modules can be used – both AC, both DC,
or one AC and one DC.
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