Figure 75: Connecting DC Power
CAUTION:
You must ensure that power connections maintain the proper
polarity. The power source cables might be labeled
(+)
and
(–)
to indicate
their polarity. There is no standard color coding for DC power cables. The
color coding used by the external DC power source at your site determines
the color coding for the leads on the power cables that attach to the
terminal studs on each power supply.
NOTE:
The DC power supplies in
PEM0
and
PEM1
must be powered by
dedicated power feeds derived from feed A, and the DC power supplies
in
PEM2
and
PEM3
must be powered by dedicated power feeds derived
from feed B. This configuration provides the commonly deployed A/B feed
redundancy for the system.
10.
Replace the clear plastic cover over the terminal studs on the faceplate.
11.
Route the power cables along the cable restraint toward the left or right corner of the
chassis. If needed to hold the power cables in place, thread plastic cable ties, which
you must provide, through the openings on the cable restraint.
12.
Verify that the power cabling is correct, that the cables are not touching or blocking
access to services gateway components, and that they do not drape where people
could trip on them.
13.
Verify that the
INPUT OK
LED on the power supply is lit green.
14.
Switch the circuit breaker on the power supply to the
ON
position
—
and observe the
status LEDs on the power supply faceplate. If the power supply is correctly installed
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