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Connecting Power for DC Systems
Figure 7-9
Positive ground
Attach the two supplied female Euro-block connectors to the two cables supplying DC power to the
Step 3
power entry modules.
The cables should have three insulated number 12 AWG wires (solid or stranded) with the insulation
stripped back 0.25 inch (6 mm) on each wire.
Test which way the female connector attaches to the male connector using the pin assignments in
Figure 7-9 as a guide. For each cable, insert each of the wires into their correct holes in the connector
and secure each wire by tightening the screws in the connector.
Connect a cable to each of the power entry module connectors. The connectors are polarized so they
Step 4
cannot be inserted the wrong way.
Step 5
Use the PEM cable clamp to secure the power cable. (See Figure 7-10.) Place the cable clamp over the
connector so that the small hole is positioned over the boss on the PEM. Secure by attaching the clamp
to the PEM with the captive screw. The cable clamp can be dressed to the left or right and secured to
the clamp using a tie wrap.
If the redundant PEM module is not used, the cover power entry module must be installed in the empty
Step 6
position to ensure proper cooling of the rear cards.
Figure 7-10 PEM Cable Clamp
Use screw to attach to
power entry module
Cisco MGX 8220 Installation and Configuration
7-14
48V DC Male Power Receptacle Viewed Facing the Rear of the Shelf
Safety ground
Connector shows
through here
-48VDC
Position over boss on
power entry module
Use tie wrap to secure
power cable
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
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Troubleshooting
