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Cisco ASR 1000 Series Aggregation Services Routers Hardware Installation Guide
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Chapter 8 Cisco ASR 1002 Router Overview and Installation
Cisco ASR 1002 Router Power Supplies
Step 2
Ensure that the negative and positive leads are disconnected from the site power source.
Step 3
Using a wire stripper, strip approximately 0.55 inch (14 mm) from the negative, positive, and ground
lead.
Step 4
Insert the stripped end of the ground lead all the way into the ground lead receptacle on the –48 VDC
input power supply, and tighten the receptacle screw using a 3.5mm flat-blade screwdriver to a torque of
0.5 to 0.6Nm.
Step 5
Insert the stripped end of the positive lead all the way into the positive lead receptacle and tighten the
receptacle screw using the same 3.5mm flat-blade screwdriver. Repeat this step for the negative lead.
Note
Make sure the entire stripped end of each lead is inserted all the way into its receptacle. If any
exposed wire at the stripped end of a lead is visible after inserting the lead into its receptacle,
remove the lead from the receptacle, use the wire stripper to cut the stripped end of the lead, and
repeat Step 3 through Step 5.
Step 6
After tightening the receptacle screw for the ground, positive, and negative –48 VDC-input leads, use a
cable tie to secure the three leads to the power supply faceplate, as shown in
Figure 8-27
. When securing
the ground, positive, and negative –48 VDC-input leads to the power supply faceplate, leave a small
service loop in the ground lead to ensure that the ground lead is the last lead to disconnect from the power
supply if a great deal of strain is placed on all three leads as shown in
Figure 8-27
.
Caution
Make certain that the ground lead wire has a service loop before you tie wrap the lead wires to prevent
the ground from being disconnected.
Step 7
Connect the ground, positive, and negative leads to the power source.
Step 8
Turn the branch source breaker on.
Step 9
Place the –48 VDC Standby switch in the On (|) position. The power supply LEDs light when power is
supplied to the router.
You have completed the procedure for connecting a –48 VDC power supply in the Cisco ASR 1002
Router.
Connecting Cisco +24 VDC Power Supply
The +24 VDC power supply uses a spring-loaded terminal block. The input terminal block requires
8 AWG multi-strand wiring to support input current. Features are provide for strain relieving the input
wires from the terminal block on the front panel. The recommended branch circuit breaker for the Cisco
ASR 1002 24 VDC power supply is a 40 A UL listed circuit breaker.
Before you begin, read these important notices about the +24 VDC power supply:
•
The labeling di27 VDC INPUT. This labeling describes the nominal voltage provided at a
cell site.
•
Observe the polarity location—Unlike the polarity labels of the –48 VDC power supply (ground,
positive, negative), the polarity labels on the +24 VDC are ground, negative, positive as shown in
Figure 8-28
from right to left as they appear on the actual power supply unit.
•
The ground (GND) lead is always installed first and removed last.
