Table 18: Site Electrical Wiring Guidelines for the Services
Gateway (continued)
GuidelineSite Wiring Factor
To reduce or eliminate the emission of RFI from your site wiring:
•
Use twisted-pair cable with a good distribution of grounding
conductors.
•
Use a high-quality twisted-pair cable with one ground conductor
for each data signal when applicable, if you must exceed the
recommended distances.
Radio Frequency
Interference (RFI)
Provide a properly grounded and shielded environment and use
electrical surge-suppression devices.
Strong sources of electromagnetic interference (EMI) can cause
the following damage:
•
Destroy the signal drivers and receivers in the device
•
Conduct power surges over the lines into the equipment, resulting
in an electrical hazard
NOTE: If your site is susceptible to problems with EMC, particularly
from lightning or radio transmitters, you may want to seek expert
advice.
Electromagnetic
Compatibility (EMC)
CAUTION: To comply with intrabuilding lightning/surge requirements, the
intrabuilding wiring must be shielded. The shielding for the wiring must be
grounded at both ends.
Related
Documentation
General Site Guidelines for Installing the SRX220 Services Gateway on page 29•
• SRX220 Services Gateway Electrical and Power Requirements
• SRX220 Services Gateway Power Specifications and Requirements on page 32
SRX220 Services Gateway Power Specifications and Requirements
The AC power system electrical specifications for the SRX220 Services Gateway are
listed in Table 17 on page 33.
Table 19: Power Supply Electrical Specifications for the SRX220 Services
Gateway
SpecificationPower Requirement
100 to 240 VACAC input voltage
47 to 63 HzAC input line frequency
Copyright © 2012, Juniper Networks, Inc.36
SRX220 Services Gateway Hardware
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