Juniper EX Series Complete Hardware Guide

WARNING: Ensure that the power cables do not block access to switch components
or drape where people can trip on them.
6. Connect the power supplies to the power sources. Secure power source cables
to the power supplies by screwing the ring lug attached to the cable to the
appropriate terminal by using the screw from the terminal (see
Figure 46 on page 85).
■ To connect a power supply to a power source:
a. Leave the jumpers on the power supply terminals in place.
b. Secure the ring lug of the positive (+) DC power source cable to the A+
or B+ terminal on the DC power supply.
c. Secure the ring lug of the negative (–) DC power source cable to the A–
or B– terminal on the DC power supply.
d. Tighten the screws on the power supply terminals until snug using the
Phillips (+) screwdriver, number 2. Do not overtighten—apply between
8 lb-in. (0.9 Nm) and 9 lb-in. (1.02 Nm) of torque to the screws.
If you have a second installed power supply, connect it in the same way you
did the first.
■ To connect one power supply to two power sources:
a. Remove the jumpers on the power supply terminal block.
b. Secure the ring lug of the positive (+) DC power source cable from the
first DC power source to the A+ terminal on the first DC power supply.
c. Secure the ring lug of the negative (–) DC power source cable from the
first DC power source to the A– terminal on the first DC power supply.
d. Secure the ring lug of the positive (+) DC power source cable from the
second DC power source to the A+ terminal on the second DC power
supply.
e. Secure the ring lug of the negative (–) DC power source cable from the
second DC power source to the A– terminal on the second DC power
supply.
f. Tighten the screws on the power supply terminals on both the power
supplies until snug using the Phillips (+) screwdriver, number 2. Do not
overtighten—apply between 8 lb-in. (0.9 Nm) and 9 lb-in. (1.02 Nm) of
torque to the screws.
84 ■ Connecting DC Power to an EX 3200 or EX 4200 Switch
Complete Hardware Guide for EX 3200 and EX 4200 Switches

Juniper EX Series Specifications

General

Series	EX Series
Category	Switch
Layer	Layer 2/3
Operating System	Junos OS
Managed	Yes
ACLs	Yes
Port Density	Varies by model
Power over Ethernet (PoE)	Available on some models
Virtual Chassis	Supported on some models
Form Factor	Fixed configuration, Modular
Switching Capacity	Varies by model
Forwarding Rate	Varies by model
Power Supply	Varies by model (AC or DC, redundant options available)
Management	CLI, Web UI, SNMP
Redundancy	Power supply, fan, Virtual Chassis
Latency	Varies by model
Jumbo Frames	Supported
VLAN Support	Yes
MAC Address Table Size	Varies by model
QoS	Yes
Energy Efficiency	EEE (802.3az)
Dimensions	Varies by model
Weight	Varies by model
Operating Temperature	0° to 45° C
Storage Temperature	-40° to 70° C
Humidity	5% to 90% non-condensing
MTBF	Varies by model
Warranty	Limited Lifetime