Dc Power To The Fan Cooling Assembly; Figure 7-11 Dc Power Cabling For One-Shelf And Two-Shelf Racks - Cisco MGX 8220 Installation And Configuration Manual

Chapter

DC Power to the Fan Cooling Assembly

A cable is provided with the main and booster cooling assemblies for delivering power from the shelf
to the fan cooling assembly. The cable provides for redundancy, and the cooling unit can be powered
from two independent shelves.
1.
2.
The cooling assembly cabling for single and multishelf racks is shown in Figure 7-11 and Figure 7-12.

Figure 7-11 DC Power Cabling for One-Shelf and Two-Shelf Racks

Plenum or spacer
P3
MGX 8220 shelf AXIS shelf
1B
P1
Main cooling
module
Power to cooling
DC source
module
(optional
secondary)
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Connect the cable to the connector on rear of the shelf located between the power entry modules
(P1 for primary and P3 for redundant). When fully inserted, the cable will latch into place
preventing accidental removal. To unlatch the connector, use a small screwdriver to slide the catch
lever (located inside the slot on the connector) to the right.
Connect the other end of the cable to the receptacle on the rear of the fan cooling assembly, P2. If
the redundant portion of the cable is not used, it should be dressed to the side using a cable bundle
or a cable management tray.
1A
P2
DC source
(primary)
Plenum or spacer
AXIS shelf
MGX 8220 shelf
2B
P3
AXIS shelf
MGX 8220 shelf
1B
P1
Main cooling
module
Power to cooling
DC source
module
(optional
secondary)
Cisco MGX 8220 Installation and Configuration
Connecting Power for DC Systems
2A
1A
P2
DC source
(primary)
7-15