Figure 5-82 Polarities At The Mgx 8830 Pem Pluggable Terminal Block; Figure 5-83 Pluggable Terminal Block On Mgx 8830 Dc Pem - Cisco MGX MGX 8800 Hardware Installation Manual

Chapter 5 Installing the Cisco MGX Switch or Gateway
Figure 5-82
-48 VDC
1
Locate the wiring block for TB1.
Step 4
Figure 5-83
Figure 5-83
– 48 VDC
Step 5 Insert and secure the stripped ends of the 10 AWG wire in the wiring block as shown in
Figure
pluggable wire block.
Plug the pluggable terminal block to the receptacle TB1 on the DC PEM.
Step 6
For each DC PEM, connect the DC input wiring to a separate dedicated DC source capable of supplying
Step 7
at least 30 amps (typical).
The –48VDC power source in the building should have a 30 Amp DC circuit breaker. The building's
wiring should include an easily accessible disconnect device. Make sure the safety ground wire connects
to a reliable building (earth) ground.
For personnel safety, the green or green/yellow wire must connect to safety (earth) ground at both the
Warning
equipment and at the supply side of the DC wiring.
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Polarities at the MGX 8830 PEM Pluggable Terminal Block
-48 VDC
return
Safety
ground
2 3
illustrates the TB1 wiring block (that is, the mating plug that attaches to TB1).
Pluggable Terminal Block on MGX 8830 DC PEM
–48 VDC Return
Safety ground
10 AWG
or 4 sq. mm.
5-83. Figure 5-83 shows the assembly with an example wire and the screw that secures it in the
Installing the MGX 8830 or MGX 8830/B Switch
Cisco MGX 8800/8900 Series Hardware Installation Guide
Figure 5-82 and
5-129