Juniper EX4200 User Manual

•
Ensure that the polarity of the DC input wiring is correct. Under certain conditions,
connections with reversed polarity might trip the primary circuit breaker or damage
the equipment.
•
For personal safety, connect the green and yellow wire to safety (earth) ground at both
the device and the supply side of the DC wiring.
•
The marked input voltage of –48 VDC for a DC-powered device is the nominal voltage
associated with the battery circuit, and any higher voltages are only to be associated
with float voltages for the charging function.
•
Because the device is a positive ground system, you must connect the positive lead to
the terminal labeled RTN, the negative lead to the terminal labeled –48 VDC, and the
earth ground to the device grounding points.
Related
Documentation
General Safety Guidelines and Warnings on page 267•
• General Electrical Safety Guidelines and Warnings on page 299
• DC Power Disconnection Warning on page 308
• DC Power Grounding Requirements and Warning on page 309
• DC Power Wiring Sequence Warning on page 310
• DC Power Wiring Terminations Warning on page 312
• Connecting DC Power to an EX2200 Switch
• Connecting DC Power to an EX3200 Switch
• Connecting DC Power to an EX4200 Switch on page 179
• Connecting DC Power to an EX4300 Switch
• Connecting DC Power to an EX4500 Switch
• Connecting DC Power to an EX4550 Switch
• Connecting DC Power to an EX4600 Switch
• Connecting DC Power to an EX6200 Switch
• Connecting DC Power to an EX8200 Switch
• Connecting DC Power to an EX9204 Switch
• Connecting DC Power to an EX9208 Switch
• Connecting DC Power to an EX9214 Switch
• Connecting DC Power to an OCX1100 Switch
• Connecting DC Power to an XRE200 External Routing Engine
• Connecting DC Power to a QFX3500, QFX3600, or QFX3600-I Device
• Connecting DC Power to a QFX5100 Device
307Copyright © 2015, Juniper Networks, Inc.
Chapter 31: Electrical Safety Guidelines and Warnings

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