Installation guide

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Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
Chapter 2 Preparing to Install
Making Power and Ground Connections
Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit.
To see translations of this warning, refer to the Regulatory Compliance and Safety Information
document that accompanied this product.
To make a DC power connection:
Step 1 For both standalone systems, the cable guard (located at the right edge of the chassis) remains off until
the system is ready to power up. Remove the cable guard by loosening the captive screw at its base then
swinging it away from the chassis (do this latter movement holding the top of the cable guard in place
while moving the bottom of it away from the chassis).
Step 2 Insert and secure the stripped ends of the wire in the wiring block according to the scheme in Figure 2-31
and Figure 2-32. Figure 2-31 illustrates the polarity of each connection on the pluggable terminal block.
The numbers start with 1 at the bottom and go to 3. The connection at the bottom is for the –48 VDC
wire. The middle wire is the safety ground. The connection at the top is for the positive return wire (for
the –48 VDC). Figure 2-32 shows the assembly with an example wire and the screw that secures it in the
pluggable wire block.
Figure 2-31 Polarities at Pluggable Terminal Block
H8390
1
3
2
-48 VDC
-48 VDC return
Safety ground