Juniper E Series Hardware Manual page 78

ERX 7.0.x Hardware Guide
1.
2.
WARNING: Be sure the power source is turned off, the E-series 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 E-series router
power units, confirm the connection of the power cables to the + (positive) and
– (negative) leads at the power source.
3.
4.
5.
6.
7.
8.
NOTE: To provide redundancy, Power A and Power B leads should not terminate at
the same power source.
9.
10.
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Cabling the E-series Router for Power
Be sure you have completed Task 1 and Task 2 in the previous sections.
If applicable, loosen the screws from the clear power input module cover
and remove it.
Remove the nuts and locking washers from the posts for the power input (A
or B) using a small insulated adjustable wrench.
Place one negative (neutral) cable lead on the post labeled –48 VDC.
Replace the locking washers and nuts, and tighten the nuts to secure the
connection.
Place the other cable lead on the post labeled RTN.
Replace the locking washer and nut, and tighten the nut to secure the
connection.
Attach the opposite end of Power A's wire leads to the appropriate leads on
your power source.
Place the clear plastic guard over the terminal posts, and secure it in place by
tightening the four screws.
Repeat Steps 1–9 for each power input module in your configuration.