Cisco ME 3400E Manuale utente

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Cisco ME 3400E Ethernet Access Switch Power-Supply Modules

This document provides the high-level steps for installing the AC and the DC power-supply modules for

the Cisco ME 3400E-24TS-M and the Cisco ME 3400EG-12CS-M switches. For the complete installation

instructions, see the Cisco ME 3400E Ethernet Access Switch Hardware Installation Guide at this URL:

http://www.cisco.com/en/US/docs/switches/metro/me3400e/hardware/installation/guide/me3400e_hig.ht

For a complete list of the safety warnings in the required languages, see the Regulatory Compliance and

Safety Information for the Cisco ME 3400E Switch on the Documentation CD.

Observe these warnings when you install and power-on the power-supply module:

Warning

Do not reach into a vacant slot or chassis while you install or remove a module or a fan.

Exposed circuitry could constitute an energy hazard.

Statement 206

Warning

Do not work on the system or connect or disconnect cables during periods of lightning

activity.

Statement 1001

Warning

Only trained and qualified personnel should be allowed to install, replace, or service this

equipment.

Statement 1030

For DC power-supply modules, observe these warnings:

Warning

An exposed wire lead from a DC-input power source can conduct harmful levels of

electricity. Be sure that no exposed portion of the DC-input power source wire extends from

the terminal block plug.

Statement 122

Warning

Before connecting or disconnecting ground or power wires to the chassis, 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. Use a voltmeter to test for 0 (zero) voltage at the power terminals on the chassis.

Statement 196

Warning

This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that the

protective device is rated not greater than: 5 A.

Statement 1005

Warning

A readily accessible two-poled disconnect device must be incorporated in the fixed wiring.

Statement 1022

For all power-supply modules, review these caution statements:

Caution To prevent overheating and to maintain proper air flow, either an AC or a DC power-supply module or a module

blank should be installed in both power-supply module slots at all times.

Note Before you install the AC or DC power-supply module, turn off the power supply at its source.

The power-supply module slots are on the switch rear panel, and the power connectors are on the front panel.

Install the AC Power-Supply Module

Step 1 Insert the power-supply module in the slot

on the switch rear panel, and align and

tighten the retainer screws.

Step 2 Connect the AC power cord to the

AC power input. Secure with the retainer

clip and the bushing.

Step 3 Turn on power, and verify that the

AC power-supply LED on the switch front

panel is green.

250447

PSU OK

250448

250449

Install the DC Power-Supply Module

Step 1 Attach the ground lug to a ground wire

(connected to a ground connection), and

attach the ground lug to the switch rear

panel.

Step 2 Insert the power-supply module in the

rear-panel slot, and align and tighten the

retainer screws.

Step 3 Set the DC voltage selector on the

power-supply module:

•Telecom: –48 VDC

•Industrial: +24 VDC

Step 4 Use 16-gauge copper wire to connect the

DC input power source and connect it to

the DC power connector on the switch

front panel.

Step 5 Turn on the power.

Step 6 On the switch front panel, verify that the

DC power-supply LED is green for that

module.

Step 7 If installing only one power supply, enter

this command to suppress alerts:

If installing two, no commands are needed.

switch# no power-supply dual dc-feed

switch# end

250451

250450

PSU OK +24V -48V

250452

PSU OK +24V -48V

250453

250454

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