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Cisco MGX 8230 Edge Concentrator Installation and Configuration
Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001
Chapter4 Enclosure Installation Rack Mounting an MGX 8230
Figure4-9 Polarities at MGX 8230 PEM Pluggable Terminal Block
Step 4 Locate the wiring bl ock for TB1. Figure 4-10 illustrates the TB1 wiring block (that is, the mating plug
that attaches to TB1).
Figure4-10 Pluggable Terminal Block on MGX 8230 PEM
Step 5 Insert and secure the stripped ends of the 10 AWG wire in the wiring block as shown in Figure4-9 and
Figure4-10. Figure 4-10 shows the assembl y wi th an ex am ple wire and the screw that s ecu re s it in t he
pluggable wire block.
Step 6 Plug the pluggable terminal block to the receptacle TB1 on the PEM.
Step 7 If you have a redundant DC PEM install ed in you r MGX 8230, repeat step 1 thro ugh ste p 6 for the s econd
DC PEM.
Step 8 For each DC PEM, connect the DC input wiring to a separ at e dedi cat ed DC so urce capab le of su pplyi ng
at least 30 Amps (typical). The –48VDC power source in the building should have a 30 Amp DC circuit
breaker. The building’s wiring shou ld i nc lu d e an e as il y acc es sib l e d isc on ne ct devi ce. M ake s u re 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.
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-48 VDC
-48 VDC
return
Safety
ground
10 AWG
or 4 sq. mm.
–48 VDC Return
Safety ground
–48 VDC
3
2
1
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