Juniper J2300 Getting Started Manual page 128

J2300, J4300, and J6300 Services Router Getting Started Guide
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
4.
106
Connecting Power
Ensure that the voltage across the DC power source cable leads is 0 V
a.
and that there is no chance that the cable leads might become active
during installation.
Verify that a licensed electrician has attached the appropriate power cable
b.
lugs to the negative and positive DC source power cables.
Use a Phillips screwdriver to remove the clear plastic cover protecting
c.
the terminal block.
Within the terminal block, remove the two center screws next to the
d.
labels and
–48 VDC 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
e.
power cable lug to the
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
f.
cable lug to the
–48 VDC
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.
g.
Replace the clear plastic cover over the terminal block.
h.
Verify that the power cables do not block access to router components or
drape where people can trip on them.
and to indicate their polarity.
(+) (–)
.
terminal. Tighten the screw until snug. Do not
RTN
terminal. Tighten the screw until snug. Do not