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4 – Installation
Installing a Switch
59021-08 B 4-7
D
To energize the switch, do the following:
1. Connect the power cords to the AC power receptacles on the front of the
switch chassis.
2. Connect each power cord to a 3-wire, grounded, AC outlet that delivers
power in accordance with the power requirements in
Appendix A Specifications.
3. Place one or both power On/Off switches in the On position to energize the
switch logic circuitry. Confirm that the Input Power LED on the switch
chassis is illuminated indicating that the switch logic circuitry is receiving DC
voltage. If not, contact your authorized maintenance provider.
4. Confirm that the Output Power LEDs on both power supplies are illuminated.
If not, do the following:
a. Check voltage at the AC power source.
b. Inspect the power cord.
c. Replace the power supply.
5. Observe the Heartbeat LED to determine the results of the Power On Self
Test (POST). The POST tests the condition of firmware, memories,
data-paths, and switch logic circuitry and passes a blink code to the
Heartbeat LED. If the Heartbeat LED blinks steadily about once per second,
the POST was successful, and you can continue with the installation
process. Any other blink pattern appears indicates that an error has
occurred. Refer to ”Heartbeat LED Blink Patterns” on page 5-2 for more
information about the error blink pattern.
Note: To provide redundancy in the event of an AC power circuit failure,
connect the switch power supplies to separate AC circuits.