7-19
Cisco MGX 8220 Installation and Configuration
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Chapter Connecting Power for AC Systems
Repeat Steps 1 and 2 for any other shelves in the rack that are power ed from th e s ame powe r asse m bl y.
Step 3 The AC power source is connected to the IEC recep ta cles 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 su pp ly in g 1 5A . Th e fa ci lit y cir cu it sh ou l d b e pr o tec ted w i th a 20A
circuit breaker with long tr i p d el ay.
Step 4 Ground (green) wire of the AC power cord is connected to the MGX 8220 system for safety ground.
Make sure that the buil di ng AC r e c e p tac le is properly grounde d.
Step 5 If the left power connector on an M G X 8 2 20 s h el f is n ot u sed , a cove r m ust b e i nst al led i n t h e em pty
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.
Figure7-14 AC Cabling for One-Shelf and Two-Shel f Racks
Main cooling
module
Plenum or spacer
AXIS shelf
Primary AC
source
Optional
secondary
AC source
Main cooling
module
Plenum or spacer
AXIS shelf
Primary AC
source
Optional
secondary
AC source
AXIS shelf
Power
& monitor Power
& monitor
Power Power
4A 3A 2A 1A
4A 3A 2A 1A 3B 2B 1B
3B 2B 1B
P3
P1
1B 1A P1
1B 1A
P3
2B 2A
P2 P2
H8286
MGX 8220 shelf MGX 8220 shelf
MGX 8220 shelf