Site Electrical Wiring Guidelines For Mx Series Routers; Distance Limitations For Signaling; Radio Frequency Interference; Electromagnetic Compatibility - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide
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Site Electrical Wiring Guidelines for MX Series Routers

Distance Limitations for Signaling

Radio Frequency Interference

Electromagnetic Compatibility

382
NOTE: Additional grounding is provided to an AC-powered router when you
plug its PDMs into grounded AC power receptacles.
WARNING: The router is installed in a restricted-access location. It has a
separate protective earthing terminal (Metric [–M6] and English [–¼-20]
screw ground lugs) provided on the chassis in addition to the grounding pin
of the power supply cord. This separate protective earth terminal must be
permanently connected to earth.
Grounding the MX2020 Router on page 116
Tools and Parts Required for MX2020 Router Grounding and Power Connections on
page 115
Distance Limitations for Signaling on page 382
Radio Frequency Interference on page 382
Electromagnetic Compatibility on page 382
Improperly installed wires can emit radio interference. In addition, the potential for damage
from lightning strikes increases if wires exceed recommended distances or if wires pass
between buildings. The electromagnetic pulse (EMP) caused by lightning can damage
unshielded conductors and destroy electronic devices. If your site has previously
experienced such problems, you might want to consult experts in electrical surge
suppression and shielding.
You can reduce or eliminate the emission of radio frequency interference (RFI) from your
site wiring by using twisted-pair cable with a good distribution of grounding conductors.
If you must exceed the recommended distances, use a high-quality twisted-pair cable
with one ground conductor for each data signal when applicable.
If your site is susceptible to problems with electromagnetic compatibility (EMC),
particularly from lightning or radio transmitters, you might want to seek expert advice.
Strong sources of electromagnetic interference (EMI) can destroy the signal drivers and
receivers in the router and conduct power surges over the lines into the equipment,
resulting in an electrical hazard. It is particularly important to provide a properly grounded
and shielded environment and to use electrical surge-suppression devices.
Copyright © 2013, Juniper Networks, Inc.