Juniper EX4600 Hardware Guide

8. Connect each power supply to the power sources. Secure power source cables to the power
supplies by screwing the ring lugs aached to the cables to the appropriate terminals by using the
screw from the terminals (see Figure 30 on page 85 and Figure 31 on page 86 ).
The EX4600 is designed to operate with a DC power supply that has a single, non-redundant, feed
input. For source redundancy, two DC power supplies must be installed in EX4600; connect source
(A) to one power supply and connect source (B) to the second power supply. This conguraon
provides the commonly deployed A/B feed redundancy for the system.
The terminal block of the power supply has four terminals labeled V+, V+, V–, and V– for
connecng DC power source cables labeled posive (+) and negave (–). The V+ terminals are
shunted internally together, as are the V- terminals.
CAUTION: The connecon between each power source and power supply must
include a circuit breaker.
Do not connect two sources to a single power supply because doing so can
potenally cause circulang current in feed wires whenever there is any dierence
in the voltage of the two sources.
a. Secure the ring lug of the posive (+) DC power source cable to the V+ terminal on the DC
power supply.
b. Secure the ring lug of the negave (–) DC power source cable to the V– terminal on the DC
power supply.
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Juniper EX4600 Specifications

General

Rack Units	1U
Junos OS	Yes
Product Series	EX Series
DRAM	8 GB
Flash Memory	16 GB
Ports	4 x 40GbE QSFP+ ports
Power Supply	Dual, hot-swappable
MAC Address Table Size	288, 000
Jumbo Frames	9216 bytes
Input Voltage	100-240 V AC
Operating Temperature	0°C to 40°C
Memory	8 GB
Storage	16 GB