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Cisco MGX 8950 Hardware Installation Guide
Release 3, Part Number 78-14147-02 Rev. A0, November 2002
Chapter 3 Installing a Cisco MGX 8950
Installation Procedures
Figure 3-21 Interconnect Power Connections for AC
Connect the DC PEM to the Cisco MGX 8950 Switch
A system power cable carries –48 VDC current from a DC-PEM to the backplane (see Figure 3-23).
Caution The DC power interconnect cables from each PEM must be connected to the backplane. If the cables are
not connected, the power supply monitoring circuit will mistake this as voltage failure and will result in
a tripped circuit breaker.
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