Juniper Networks J4350 User Manual

Page 109

Installing and Connecting a Services Router

With a Phillips screwdriver, remove the screws and washers from the PEM
nuts at the grounding point on the rear of the chassis.

Place the grounding lug at the other end of the cable over the grounding

point, as shown in Figure 34.

Secure the cable lug to the grounding point, first with the washers, then

with the screws.

NOTE: A DC power supply in a Services Router becomes grounded when you
connect a grounding cable between the router and earth ground.

For each power supply:

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

and that there is no chance that the cable leads might become active
during installation.

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 each power
supply. You must ensure that power connections maintain the proper polarity. The
power source cables might be labeled

(+)

and

(–)

to indicate their polarity.

Verify that a licensed electrician has attached the appropriate power cable

lugs to the negative and positive DC source power cables.

Use a Phillips screwdriver to remove the clear plastic cover protecting

the terminal block.

Within the terminal block, remove the two center screws next to the

labels

–48 VDC

and

RTN

Each screw contains a captive washer to secure a DC source power cable
lug to the terminal block.

Using one of the removed screws, secure the positive (+) DC source

power cable lug to the

RTN

terminal. Tighten the screw until snug. Do not

overtighten. Apply between 8 lb-in. (0.9 Nm) and 9 lb-in. (1.02 Nm) of
torque to the screw.

Using the other removed screw, secure the negative (–) DC source power

cable lug to the

–48 VDC

terminal. Tighten the screw until snug. Do not

overtighten. Apply between 8 lb-in. (0.9 Nm) and 9 lb-in. (1.02 Nm) of
torque to the screw.

Dress the power cables appropriately.

Connecting Power

This manual is related to the following products:

J6350