Juniper EX4300 Series

Table 31: Airow Direcon in AC Power Supply Models for EX4300 Switches (Connued)
Model Label on
Power Supply
Direcon of Airow
JPSU-350-AC-AFI-A AIR IN (AFI) Back-to-front—that is, air intake to cool the chassis is through the
vents on the rear panel of the chassis and hot air exhausts through the
vents on the front panel of the chassis.
JPSU-715-AC-AFO-A AIR OUT
(AFO)
Front-to-back—that is, air intake to cool the chassis is through the
vents on the front panel of the chassis and hot air exhausts through
the vents on the rear panel of the chassis.
JPSU-1100-AC-AFO-
A
AIR OUT
(AFO)
Front-to-back—that is, air intake to cool the chassis is through the
vents on the front panel of the chassis and hot air exhausts through
the vents on the rear panel of the chassis.
JPSU-1400W-AC-
AFO
AIR OUT
(AFO)
Front-to-back—that is, air intake to cool the chassis is through the
vents on the front panel of the chassis and hot air exhausts through
the vents on the rear panel of the chassis.
N+0 Redundancy Conguraon of AC Power Supplies
In an
N +0 redundancy conguraon, lower priority PoE ports may be impacted if a power supply fails.
Table 32 on page 96 lists the N +0 power calculaon for 24-port EX4300 switches that use 350 W,
715 W, and 1100 W power supplies.
Table 32: N+0 AC Power
Calculaons for 24-Port EX4300 Switches
Power Supply Rang Total Power
(in was)
PSU
0
(W) +
PSU
1
(W)
Usable
System
Power (in
was)
Backup
Power (in
was)
Base
Power (in
was)
Available
PoE Power
(in was)
Ports
Enabled for
PoE+
PSU
0
PSU
1
350 W AC –
350 350 0 150 200 6
350 W AC 350 W AC 700 665 0 150 515 17
96