Specifications

Input/Output Controller Replacement Instructions 29
Reconnecting Input Power and Powering Up the Router
This completes the steps for reconnecting AC-input power to a Cisco 7200 series router or
Cisco uBR7200 series router. Proceed to the “Powering Up the Router” section on page 32.
Reconnecting DC-Input Power
To reconnect DC-input power to a Cisco 7200 series router or Cisco uBR7200 series router,
complete the following steps:
Note The color coding of the DC-input power supply leads depends on the color coding of the DC
power source at your site. Typically, green or green/yellow is used for ground, black is used for +48V
(return), and red or white is used for –48V. Make certain the lead color coding you choose for the
DC-input power supply matches the lead color coding used at the DC power source.
Warning Before completing any of the following steps, and to prevent short-circuit or shock
hazards, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate
the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the
OFF position, and tape the switch handle of the circuit breaker in the OFF position.
Warning When installing the unit, the ground connection must always be made first and
disconnected last.
Step 1 Ensure that the –48V and +48V leads are disconnected from the power source.
Step 2 At the rear of the router, check that the power switch on the power supply is in the OFF
(O) position. (For a Cisco 7200 series router, see Figure 20. For a Cisco uBR7200 series
router, see Figure 21.)
Figure 20 Connecting DC-Input Power to a Cisco 7200 Series Router
H8622
DC power leads
Cable tie
Ground lead
service loop
Power switch