Radio Frequency Interference; Electromagnetic Compatibility; Router Power Requirements; Table 20: Component Power Requirements - Juniper M10i Hardware Manual

M10i Internet Router Hardware Guide

Radio Frequency Interference

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.

Electromagnetic Compatibility

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.
CAUTION: To comply with intrabuilding lightning/surge requirements, intrabuilding
wiring must be shielded, and the shield for the wiring must be grounded at both
ends.

Router Power Requirements

Table 20
when the router is operating under typical voltage conditions. For PIC power
requirements, see the M10i Internet Router PIC Guide.

Table 20: Component Power Requirements

Component
Base system (with fans running at normal
speed)
Routing Engine
CFEB
HCM
You can use the information in
Guide to calculate power consumption for various hardware configurations, input
current from a different source voltage, and thermal output, as shown in the following
examples. (For an added safety margin, the examples use a generalized value for
PICs of 0.625 A @ 48 V each.)
176
Power Guidelines, Requirements, and Specifications
on page 176 lists the power requirements for various hardware components
Power Requirement
(Watts) @ 48 V
30 (approximate)
33.6
67.2
10
Table 20
Power Requirement
(Amps) @ 48 V
0.7 A (approximate)
0.7 A
1.4 A
0.2 A
on page 176 and the M10i Internet Router PIC