Cisco MGX 8230 Specifications download pdf (Page 145)

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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

Chapter 4 Enclosure Installation

Rack Mounting an MGX 8230

Figure 4-9 Polarities at MGX 8230 PEM Pluggable Terminal Block

Step 4

Locate the wiring block for TB1. Figure 4-10 illustrates the TB1 wiring block (that is, the mating plug

that attaches to TB1).

Figure 4-10 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 Figure 4-9 and

Figure 4-10. Figure 4-10 shows the assembly with an example wire and the screw that secures it in the

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 installed in your MGX 8230, repeat step 1 through step 6 for the second

DC PEM.

Step 8 For each DC PEM, connect the DC input wiring to a separate dedicated DC source capable of supplying

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.

26265

123

-48 VDC

return

Safety

ground

10 AWG

or 4 sq. mm.

–48 VDC Return

Safety ground

–48 VDC

26264

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Cisco MGX 8230 Specifications Page 145