1-31
Cisco MGX 8800/8900 Series Hardware Installation Guide
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Chapter 1
Product Overviews
Cisco MGX 8850 and MGX 8850/B Switches
Figure 1-15
DC PEM Faceplate
For a DC-powered system, the DC PEMs are installed at the back of the air intake plenum. If you install
only one DC PEM, install it on the right, as viewed from the rear of the air intake plenum.
(See
Figure 1-16
.)
Figure 1-16
DC PEMs Installed in Back of the Air Intake Module
For more information about DC power requirements, see the
“Power Requirements” section on
page 3-17
.
1
Two-position circuit breaker. The positions
are Off and On.
4
Plastic cover.
2
J1 output connector.
5
Terminal block 1 (DC input).
3
Green LED showing status of the DC PEM.
J1
-48V
OFF
ON
RTN
DC OK
84460
4
3
2
1
5
16191
Primary
DC PEM
Secondary
DC PEM