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APPENDIX D
Power Guidelines, Requirements, and
Specifications for the TX Matrix Router
Topics include:
•
TX Matrix Chassis Grounding Specifications on page 337
•
TX Matrix DC Power System Specifications on page 338
•
TX Matrix DC Power Supply Specifications on page 338
•
TX Matrix DC Power Requirements on page 339
•
TX Matrix DC Power Cable and Lug Specifications on page 341
•
TX Matrix DC Power Distribution on page 342
•
Site Electrical Wiring Guidelines for M Series, MX Series, and T Series Routers on page 343
TX Matrix Chassis Grounding Specifications
To meet safety and electromagnetic interference (EMI) requirements and to ensure
proper operation, the TX Matrix router must be adequately grounded before power is
connected. Two pairs of threaded inserts (PEM nuts) are provided on the right rear of
the chassis for connecting the TX Matrix router to earth ground.
CAUTION:
Before TX Matrix router installation begins, a licensed electrician
must attach a cable lug to the grounding and power cables that you supply.
A cable with an incorrectly attached lug can damage the TX Matrix router
(for example, by causing a short circuit).
To ground the TX Matrix router, connect a grounding cable to earth ground and then
attach it to the chassis grounding points using two screws. The left pair of grounding
points fits M6 screws (European), and the right pair fits UNC 1/4–20 screws (American).
The grounding points are spaced at 0.625-in. (15.86-mm) centers. The accessory box
shipped with the TX Matrix router includes the cable lug that attaches to the grounding
cable and two UNC 1/4–20 screws used to secure the grounding cable to the right pair
of grounding points. (The cable lug shown in Figure 144 on page 338 is also used for the
DC power cables.) The grounding cable must be able to handle up to 63 A. The accessory
box shipped with the TX Matrix router includes the cable lug that attaches to the grounding
cable (see Figure 144 on page 338).
337
Copyright © 2010, Juniper Networks, Inc.
Summary of Contents for TX MATRIX
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