Juniper EX4200 User Manual

• Environmental Requirements and Specifications for a QFX3100 Director Device
• Environmental Requirements and Specifications for a QFX3008-I Interconnect Device
• Environmental Requirements and Specifications for a QFX3500 Device
• Environmental Requirements and Specifications for QFX3600 and QFX3600-I Devices
• Environmental Requirements and Specifications for a QFX5100 Device
Site Electrical Wiring Guidelines
This topic applies to hardware devices in the EX Series product family, which includes
EX Series switches, the EX Series Redundant Power System (RPS), and the XRE200
External Routing Engine.
This topic also applies to hardware devices in the QFX Series and to OCX1100 switches.
Table 32 on page 67 describes the factors you must consider while planning the electrical
wiring at your site.
WARNING: It is particularly important to provide a properly grounded and
shielded environment and to use electrical surge-suppression devices.
Table 32: Site Electrical Wiring Guidelines
GuidelinesSite Wiring Factor
If your site experiences any of the following problems, consult experts in
electrical surge suppression and shielding:
•
Improperly installed wires cause radio frequency interference (RFI).
•
Damage from lightning strikes occurs when wires exceed recommended
distances or pass between buildings.
•
Electromagnetic pulses (EMPs) caused by lightning damage unshielded
conductors and electronic devices.
Signaling limitations
To reduce or eliminate RFI from your site wiring, do the following:
•
Use a 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.
Radio frequency
interference
If your site is susceptible to problems with electromagnetic compatibility
(EMC), particularly from lightning or radio transmitters, seek expert advice.
Some of the problems caused by strong sources of electromagnetic
interference (EMI) are:
•
Destruction of the signal drivers and receivers in the switch
•
Electrical hazards as a result of power surges conducted over the lines
into the equipment
Electromagnetic
compatibility
67Copyright © 2015, Juniper Networks, Inc.
Chapter 6: Preparation Overview

Juniper EX4200 Specifications

General

Model	EX4200
Switching Capacity	128 Gbps
Layer	Layer 2 and Layer 3
Form Factor	1U
Throughput	96 Mpps
Maximum VLANs	4096
MAC Address Table Size	16, 000
DRAM	1 GB
Flash Memory	1 GB
Forwarding Rate	96 Mpps
JUNOS Software	Yes
Ports	24 or 48
Stacking	Up to 10 switches in a Virtual Chassis configuration
Power Supply	AC or DC
Management	CLI, SNMP, J-Web
Input Voltage	100-240 VAC or -48 VDC
Operating Temperature	0°C to 45°C
Redundancy	Redundant power supplies
Virtual Chassis Technology	Yes
Storage Temperature	-40°C to 70°C
Humidity	5% to 90% non-condensing