Cisco ASR 902 Installation Manual page 21

Installing the Cisco ASR 902 Router
Installing a DC Power Supply Module
Perform the following procedure to install a power supply module:
Step 1
Ensure that the system (earth) ground connection has been made. For ground connection installation instructions, see
the Installing the Chassis Ground
Step 2 If present, remove the blank power supply filler plate from the chassis power supply bay opening by loosening the captive
installation screws.
Step 3 Verify that power to the DC circuit connected to the power supply you are installing is off. To ensure that power has
been removed from the DC circuits, locate the circuit breakers for the DC circuits, switch the circuit breakers to the OFF
position, and tape the circuit-breaker switches in the OFF position.
Step 4 Grasp the power supply handle with one hand. Place your other hand underneath the power supply, as shown in the
figure below . Slide the power supply into the power supply bay. Make sure that the power supply is fully seated in the
bay.
Figure 16: Installing a DC Power Supply
Step 5 Tighten the captive installation screws of the power supply. The recommended maximum torque is 5.5 in.-lb (.62 N-m).
If you are installing a redundant DC power supply, repeat these steps for the second power source too.
Installing DC Power Supply Unit (A900-PWR550-D)
Perform the following procedure to install the terminal block.
Step 1 Locate the terminal block plug.
Step 2
Use a wire-stripping tool to strip the ends of each of the two wires coming from the DC-input power source to 0.27 inch
(6.6 mm) ± 0.02 inch (0.5 mm) and the wire for grounding. Do not strip more than 0.29 inch (7.4 mm) of insulation from
Connection.
Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide
Installing a DC Power Supply
21