N+0 Redundancy Configuration Of Ac Power Supplies - Juniper QFX5110 Series Hardware Documentation

Table 53: Airflow Direction in AC Power Supply Models for EX4300 Switches
Model
JPSU-350-AC-AFO-A
JPSU-350-AC-AFI-A
JPSU-715-AC-AFO-A
JPSU-1100-AC-AFO-A
JPSU-1400W-AC-AFO

N+0 Redundancy Configuration of AC Power Supplies

In an N+0 redundancy configuration, lower priority PoE ports may be impacted if a power supply fails.
Table 54 on page 174 lists the N+0 power calculation for 24-port EX4300 switches that use 350 W, 715 W,
and 1100 W power supplies.
Table 54: N+0 AC Power Calculations for 24-Port EX4300 Switches
Power Supply Rating
PSU PSU
0
350 W AC –
350 W AC 350 W AC
Label on Power
Supply Direction of Airflow
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.
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.
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.
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.
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.
Total
Power (in
watts)
PSU (W) +
0
PSU (W)
1 1
350
700
Usable Backup
System Power Base
Power (in (in Power (in
watts) watts) watts)
350 0 150
665 0 150
Available Ports
PoE Enabled
Power (in for
watts) PoE+
200 6
515 17
174