Installation guide

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Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
Chapter 2 Preparing to Install
Making Power and Ground Connections
Figure 2-29 IGX 8430 with Redundant DC Sources
Tip The single-shelf IGX 8410 and IGX 8420 have a total primary power limitation of 1050 W. The
dual-shelf IGX 8430 has a total primary power limitation of 2100 W. Primary power consumption
cannot exceed these limitations. Consult the power worksheets (see the “Power Worksheets” section on
page 2-1) to verify that your power configuration is within budget.
As the detailed steps on the following pages explain, installing DC power consists of attaching the three
wires of the DC power source to a removable wiring block, then plugging that block into the connector
on the PEM. The PEM is plugged into the PE-BC. Figure 2-30 is a view of a PE-BC (out of the card
cage) with the PEM wired up and plugged into the PE-BC. Figure 2-30 shows a nonredundant DC power
configuration. Note the blank plate that covers the unused connection.
Note A DC-powered system makes no distinction between a primary and redundant PEM (unlike the
redundancy scheme in an AC-powered system). However, Cisco suggests putting a label of some type
on the PEM to identify the branch circuit to which it goes.
Return
Safety ground
-48 VDC
Return
Safety ground
-48 VDC
Return
Safety ground
-48 VDC
Return
Safety ground
-48 VDC
Return
Feed B, 50A
-48 VDC
Return
Feed A, 50A
-48 VDC
-48 VDC source
Junction box
2
Lower PE-BC
Upper PE-BC
Junction box
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