Juniper EX4300 Series

• If one power supply is installed in the switch:
System power budget = Output waage of the installed power supply (PSU(W))
• If two power supplies are installed in the switch:
System power budget = (Sum of the output waage of the two power supplies) – (10% of the output
waage of the installed power supply)
System power budget = PSU
0
(W) + PSU
1
(W) – (0.10 x (PSU(W))
Table 49 on page 116 lists the N +0 power calculaon for EX4300 switches that use 550 W DC power
supplies.
NOTE: The DC power supply in the switch does not support Power over Ethernet (PoE); you can
use either an external power injector or an AC power supply to supply power to PoE devices that
you connect to the switch. 32-port EX4300 switches does not support Power over Ethernet
(PoE).
Table 49: N+0 DC Power Calculaons for EX4300 Switch Conguraons
Switch Conguraon Number of
Power Supplies
Total Power
(in was)
Usable System
Power (in
was)
Backup Power
(in was)
Base Power
(in was)
24-port EX4300 switch 1 550 550 0 150
2 1100 1045 550 150
32-port EX4300 switch 1 550 550 0 149
2 1100 550 550 160
48-port EX4300 switch 1 550 550 0 175
2 1100 1045 550 175
116