Juniper Networks M10i manual Installing a DC Power Supply, Removing a DC Power Supply

M10i Internet Router Hardware Guide

Figure 41: Removing a DC Power Supply

Installing a DC Power Supply

To install a DC power supply, follow this procedure (see Figure 42 and Figure 43):

1.Verify that there is no power flowing to the power supply from the external power source, so that the voltage across the leads of the power cables is 0 V. Ensure that there is no chance that the cable leads might become active during the procedure.

2.Verify that the power switch for the power supply (located on the power supply faceplate) is in the OFF (O) position.

3.Verify that the grounding cable is attached to the chassis and properly connected to an earth ground.

4.Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis. Make sure the router is attached to a proper earth ground. For more information about ESD, see “Preventing Electrostatic Discharge Damage” on page 140.

5.Grasp the handle on the power supply faceplate with one hand and place the other hand under the supply to support it.

6.Align the rear of the supply with the slide guides inside the chassis and slide the supply into the chassis until it contacts the midplane.

7.Tighten (but do not overtighten) the thumbscrews on the power supply faceplate.

8.Verify that a licensed electrician has attached a listed power cable lug to each power source cable.

9.Loop the power cables through the hook located on the faceplate to the right of the field-wiring terminals.

10.Depending on the type of power cable lugs used, loosen or remove the screws on the field-wiring terminals.

11.Insert the power cable lugs into the appropriate field-wiring terminals. Using a number 1 Phillips screwdriver, turn the screw on each field-wiring terminal

114■ Replacing Power System Components