Installing Dc Power Supply Unit (A900-Pwr550-D-E And A900-Pwr1200-D) - Cisco ASR 903 Hardware Installation Manual

Installing the DC Power Supply
Step 7
Ensure that the terminal block plug is fully seated in the terminal block header on the DC power supply panel. The plug
has a locking feature. You should hear a snap or click when it is installed properly.
Step 8 Use a tie wrap to secure the wires to the rack, so that the wires are not pulled from the terminal block plug by casual
contact. Make sure the tie wrap allows for some slack in the ground wire, as shown in the figure below .
Figure 66: Complete DC Terminal Block Plug Insertion and Secure Tie Wrap
1
Step 9
Use a tie wrap to secure the wires to the handle. Leave a service loop on the ground wire between the handle and the
connector such that it is the last to receive strain if the wires are pulled.
This completes the procedure for connecting the DC power supply in the Cisco ASR 903 Router.
If you are installing a redundant DC power supply, repeat these steps for the second power source.

Installing DC Power Supply Unit (A900-PWR550-D-E and A900-PWR1200-D)

The following tools are required:
• Cables of suitable gauge required for each type of PSU
Cisco ASR 903 Aggregation Services Router Hardware Installation Guide
108
Lead wires secured with a
tie wrap
• 10 AWG to 16 AWG for 550 W PSU
• 8 AWG to 10 AWG for 1200 W PSU
Installing the Cisco ASR 903 Router
2 DC power supply terminal
block plug being inserted
into terminal block header.