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Maintaining the Cisco 12012 7-25
Removing and Replacing a DC-Input Power Supply
Step 10
Pull the DC power cable leads down through the power supply handle and set
the power cable aside.
Caution
As an added precaution, we strongly recommend that you place electrical tape
over the exposed metal terminals on the power cable to prevent accidental contact between
the leads, or the leads and ground.
Step 11
If leads are attached to the power supply circuit breaker external alarm terminal
block, record on a piece of paper which terminals the leads are attached to for
later reconnection.
Step 12
Disconnect the leads attached to the circuit breaker alarm terminal block. (Some
sites might not have an external alarm system for the power supply circuit
breaker.)
If you plan to return the old power supply to the factory, repackage it in the shipping
container you received with the replacement power supply.
Installing a New or Replacement DC-Input Power Supply
This section provides the procedures for replacing a defective DC-input power supply or
installing a second DC-input power supply. If you are upgrading your Cisco 12012 with a
second DC-input power supply for power supply redundancy, you must meet the following
site power and source DC power cable requirements prior to installing the second power
supply:
•
A dedicated 60-amp service is available for the second power supply.
•
Three power cables—4 AWG, 0.204-inch (5.18-mm) diameter, high strand count. The
cable’s length is dependent on your router location. This cable is not available from
Cisco Systems: it is available from any commercial cable vendor.
•
Three power lugs—Must be dual-hole with 0.625-inch (15.86-mm) centers and able to
fit over M6 terminal studs. (See Figure 7-12.) This type of lug is not available from
Cisco Systems; electrical-connector vendors, such as Panduit, provide this type of lug.
Summary of Contents for Gigabit Switch Router Cisco 12012
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