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Chapter 4
Enclosure Installation
Figure 4-9
-48 VDC
1
Step 4
Locate the wiring block for TB1.
that attaches to TB1).
Figure 4-10 Pluggable Terminal Block on MGX 8230 PEM
–48 VDC
Insert and secure the stripped ends of the 10 AWG wire in the wiring block as shown in
Step 5
Figure
pluggable wire block.
Step 6
Plug the pluggable terminal block to the receptacle TB1 on the PEM.
If you have a redundant DC PEM installed in your MGX 8230, repeat step 1 through step 6 for the second
Step 7
DC PEM.
For each DC PEM, connect the DC input wiring to a separate dedicated DC source capable of supplying
Step 8
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.
Warning
For personnel safety, the green or green/yellow wire must connect to safety (earth) ground at both
the equipment and at the supply side of the DC wiring.
Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001
Polarities at MGX 8230 PEM Pluggable Terminal Block
-48 VDC
return
Safety
ground
2
3
–48 VDC Return
Safety ground
10 AWG
or 4 sq. mm.
4-10.
Figure 4-10
shows the assembly with an example wire and the screw that secures it in the
Figure 4-10
illustrates the TB1 wiring block (that is, the mating plug
Cisco MGX 8230 Edge Concentrator Installation and Configuration
Rack Mounting an MGX 8230
Figure 4-9
and
4-13
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