Juniper EX4200 User Manual

CHAPTER 3
Cooling System and Airflow
•
Cooling System and Airflow in an EX4200 Switch on page 31
Cooling System and Airflow in an EX4200 Switch
The cooling system in an EX4200 switch consists of a field-replaceable unit (FRU) fan
tray with three fans (see Figure 15 on page 31). All the EX4200 switch models, except
the EX4200-24F-S and EX4200-48T-S switches are shipped with one fan tray
pre-installed in the rear panel of the switches. EX4200-24F-S and EX4200-48T-S
switches are not shipped with pre-installed fan tray; you must order them separately.
This topic describes:
•
Fan Tray on page 31
•
Airflow Direction in the EX4200 Switch Chassis on page 31
Fan Tray
The fan tray is located at the rear of the chassis.
Figure 15: Fan Tray Used in an EX4200 Switch
Airflow Direction in the EX4200 Switch Chassis
The fan tray located at the rear of the chassis provides side-to-rear chassis cooling (see
Figure 16 on page 32).
31Copyright © 2015, Juniper Networks, Inc.

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