Juniper Networks ERX Hardware 8 User Manual
Page 82
ERX 8.0.x Hardware Guide
WARNING: Be sure the power source is turned off, the router is turned off, and
proper grounding wires are attached before continuing with this procedure.
WARNING: The wiring color code of the power cables depends on the color
coding of the DC power source installed at your site. Color code standards for DC
wiring do not exist. To ensure that the correct polarity is connected to the router
power units, confirm the connection of the power cables to the + (positive) and
– (negative) leads at the power source.
3.
Remove the nuts and locking washers from the posts for the power input (A
or B) using a small insulated adjustable wrench.
4.
Place one negative (neutral) cable lead on the post labeled –48 VDC.
5.
Replace the locking washers and nuts, and tighten the nuts to secure the
connection.
6.
Place the other cable lead on the post labeled RTN.
7.
Replace the locking washer and nut, and tighten the nut to secure the
connection.
8.
Attach the opposite end of Power A’s wire leads to the appropriate leads on
your power source.
NOTE: To provide redundancy, do not terminate Power A and Power B leads at the
same power source.
9.
Place the clear plastic guard over the terminal posts, and secure it in place by
tightening the four screws.
10.
Repeat Steps 1–9 for each power input module in your configuration.
64
Cabling the Router for Power