Before You Begin
When powering the router with DC power, you must ensure that DC power can be conveniently removed
from the unit. The power should
not
be removed by disconnecting the DC power connector on the unit.
Procedure
Step 1
Insert shielded copper wires through the cable sleeve. A maximum of four copper wires can be used.
Step 2
Pass the cable sleeve through the cord grip body, grommet, and molded body as shown in the figure below.
Step 3
Insert each of the copper wires into the O-ring contacts (see the following table) provided and tighten the
screws into the coupling unit (holding the wires) using the special screw driver. The DC power connector
assembly is now complete.
Figure 31: Assembling the DC Power Connector
Red wire, -48 V RTN
3
Black wire, -48 V
1
Green or Yellow wire, safety ground
4
White wire (not used)
2
Step 4
Before connecting DC power to the router, ensure that the ground is connected to the router (see
the Router, on page 45
).
Step 5
Turn off all power sources to the router, including the DC power source.
Do not connect the DC power connector when the router is powered
on.
Caution
When connecting the DC power to the router, always connect the router end of the cable FIRST.
When removing the DC power connector, always disconnect the router end of the cable LAST.
Caution
Step 6
Connect the DC power connector to the DC input plug on the faceplate of the router. To power on the router,
see
Powering on the Router, on page 69
.
Cisco ASR 901S Series Aggregation Services Router Hardware Installation Guide
54
OL-29732-01
Installing the Router
Assembling and Connecting the DC Power Cable to the Router