Cisco Systems MGX 8800, MGX 8900 - page 512

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Cisco MGX 8800/8900 Series Hardware Installation Guide
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Chapter5 Installing the Cisco MGX Switch or Gateway
Installing the MGX 8830 or MGX 8830/B Switch
Figure5-80 Rear View of the MGX 8830 with Two DC PEMs Installed
Note Depending on your order, there will be either one or two DC PEMs installed and shipped with
your MGX 8830 system.
Step2 Locate the pluggable terminal block (TB1) on the DC PEM to which you are connecting source power
Figure 5-81 shows the DC PEM faceplate.
Figure5-81 DC PEM Faceplate
Step3 Note the polarities of the TB1 connection points.
Figure 5-82 illustrates the polarity of each connection on the p luggable terminal block. The numbers
start with 1 on the left and go to 3. The connection at the left is for the –48 VDC wire. The middle wire
is safety ground. The connection at the right is for the positive return wire (for the –48 VDC).
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48 VDC 30A
TB1
1
2
3
OFF
48 VDC 30A
TB1
1
2
3
OFF
48 VDC 30A
TB1
1
2
3
OFF
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