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Repeat Steps 1 and 2 for any other shelves in the rack that are powered from the same power assembly.
Step 3
The AC power source is connected to the IEC receptacles on the rear of the power module. The power
assembly is available in two versions: one with a single AC power input and one with dual (redundant)
AC power inputs. The AC power cords should be plugged into a 200/240 VAC nominal, single phase,
dedicated wall outlet capable of supplying 15A. The facility circuit should be protected with a 20A
circuit breaker with long trip delay.
Step 4
Ground (green) wire of the AC power cord is connected to the MGX 8220 system for safety ground.
Make sure that the building AC receptacle is properly grounded.
Step 5
If the left power connector on an MGX 8220 shelf is not used, a cover must be installed in the empty
position to ensure proper cooling of the rear cards.
Warning
The power to the shelf is OFF at this point. DO NOT apply power until later.
Figure 7-14 AC Cabling for One-Shelf and Two-Shelf Racks
P3
Optional
secondary
AC source
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Plenum or spacer
MGX 8220 shelf
AXIS shelf
1B
1A
P1
Main cooling
P2
module
3B 2B 1B
4A 3A 2A 1A
Power
Power
& monitor
Primary AC
source
Connecting Power for AC Systems
Plenum or spacer
AXIS shelf
MGX 8220 shelf
2B
P3
AXIS shelf
MGX 8220 shelf
1B
P1
P2
3B 2B 1B
Power
Optional
Primary AC
secondary
source
AC source
Cisco MGX 8220 Installation and Configuration
2A
1A
Main cooling
module
4A 3A 2A 1A
Power
& monitor
7-19
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Troubleshooting
