Chapter 9: Connecting the Router

6.Verify that the switch on each power supply faceplate is in the OFF (O) position.

7.For each power supply, insert the appliance coupler end of a power cord into the appliance inlet on a power supply faceplate and insert the plug into an AC power source receptacle. Verify that the power cord does not block access to router components or drape where people could trip on it.

Connecting Power to a DC-Powered Router

Connect DC power to the router by inserting power cables into the field-wiring terminals on the faceplate of each power supply. Power and grounding cables are not supplied with the router. For information about the required cable type, see “DC Power, Connection, and Cable Specifications” on page 179.

CAUTION: There is no standard color coding for DC power cables. The color coding used by the external DC power source at your site determines the color coding for the leads on the power cables that attach to the terminal studs on the power supply faceplate. You must ensure that power connections maintain the proper polarity.

The power source cables might be labeled (+) and (–)to indicate their polarity.

To connect DC power to the router, follow this procedure (see Figure 26):

1.Verify that there is no power flowing from either 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.For each power supply, verify that the power switch on the power supply faceplate is in the OFF (O) position.

3.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.

4.Connect the grounding cable to a proper earth ground.

5.Verify that a licensed electrician has attached the cable lug provided with the router to the grounding cable.

6.Using a number 2 Phillips screwdriver, remove the screws next to the grounding symbol above the power supplies on the chassis rear. Secure the grounding cable lug to the chosen grounding point by reinstalling and tightening the screws.

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

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

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

Providing Power to the Router 63

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Juniper Networks M10i manual Connecting Power to a DC-Powered Router