Juniper-networks J4350 Uživatelský manuál stáhnout pdf (Strana 185)

Replacing and Troubleshooting Hardware Components

Figure 49: Removing a DC Power Supply

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Ejector

Installing a DC Power Supply in a J6350 Router

Each power supply in a DC-powered router must be connected to earth ground.

A ground t erminal is provided on each DC power supply for this purpose.

To install a DC power supply in a J6350 Services Router (see Figure 50):

1. Ensure that the voltage across the DC power source cable leads is 0 V and that

the cable

leadscannotbecomeactiveduringinstallation.

CAUTION:

There is no standard color coding for DC power cables. T he color coding

used by the external DC power source at your site determines the color coding

for the leads on the power cables that a ttach to the terminal studs on each power

supply. Y

ou must ensu re that p ower connections maintain the proper polarity. The

power source cables might be labeled

(+) and (–) to indi cate their polarity.

2. Attach an

electrostatic discharge (ESD) grounding stra p to your bare wrist and

connect the strap to the ESD point on the chassis, or to an outside ESD point if

the router is disconnected from earth ground. For mo re i nformation about

ESD, see

“Preventing Electrostatic Discharge Damage” on page 205.

3. Using both hands, slide the power supply into the chassis until you feel

resista

nce.

4. Firmly push the power supply into the chassis until it comes to a stop. Make

sure tha

t the power sup p ly faceplate is flush with any adjacent power supp ly

faceplate.

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Juniper-networks J4350 Uživatelský manuál Strana 185