Cisco 4948 - Catalyst Switch Installation Manual page 70

Removing and Installing the DC-Input Power Supply
Step 8 Connect the DC-input wires to the terminal block in this order:
Ground cable to the ground connector on the terminal block
1.
Negative (–) source DC cable to the negative (–) connector on the terminal block
2.
Positive (+) source DC cable to the positive (+) connector on the terminal block
3.
After ensuring that all wire connections are secure, reinstall the plastic terminal block cover.
Step 9
To prevent a short circuit or shock hazard after wiring the DC-input power supply, you must reinstall the
Caution
terminal block cover.
Note
Remove any safety flag and lockout devices or any tape from the circuit breaker switch handle, and
Step 10
restore power by moving the circuit breaker switch handle to the on (|) position.
Verify the power supply operation by ensuring that the INPUT OK and the OUTPUT OK LEDs on the
Step 11
power supply front panel are both green.
Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide
4-6
In a system with dual power supplies, connect each power supply to a separate power source. In
case of a power source failure to one supply, the second power source should still be available.
Chapter 4 Removal and Replacement Procedures
OL-21561-02