Juniper Networks manual ERX 8.0.x Hardware Guide

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