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Chapter 5
Connecting the Cables
Connect two return cables, one to each MGX 8260 RTN terminal for power circuit A. Connect the other
Step 5
ends to the RTN terminals at power source A.
Connect two supply cables, one to each –48V terminal for power circuit A. Connect the other ends
Step 6
through –48V circuit breaker terminals for power circuit A.
All four power terminals must have cables. A single supply and return cable pair will not support
Warning
a fully loaded MGX 8260 chassis.
Install the power circuit cover. Slide the tab at the top of the cover into the chassis, and then lower the
Step 7
body over the terminals, making sure the power cables exit through separate slots in the bottom of the
cover. (See
Make sure the power terminal cover is correctly seated and that the power cables pass freely through
Caution
the openings at the bottom. Exposed power terminals or damaged insulation pose a safety risk to
personnel.
Secure the cover with the two captive screws.
Step 8
To install redundant power circuit protection, repeat
Step 9
connecting the MGX 8260 power cables to power source B.
A logical view of MGX 8260 power connections is shown in
Step 10
with power connections installed is shown in
made as shown in these figures.
The MGX 8260 is not equipped with an internal disconnect device. To power down the node, you
Caution
must turn off the devices protecting the power feeds. If the MGX 8260 is powered from redundant
feeds, both devices must be turned off.
Apply DC power by switching the circuit breaker on.
Step 11
Figure 5-10 MGX 8260 Power Connections (Logical Diagram)
Disconnect
devices
-48VDC
Source B
-48VDC
Source A
78-10966-02
Figure
5-12.)
-48VDC B
RTN B
Step 3
through
Step 8
Figure
5-10. A rear view of the MGX 8260
Figure
5-11. Verify that your power connections have been
-48VDC A
Multiple 12 AWG
wires
Cisco MGX 8260 Hardware Installation Guide
Applying DC Power
for power circuit B,
RTN A
5-15
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