Juniper EX4400 - Page 98

We ship the EX4400 switches with one power supply preinstalled in the rear panel of the switches. You
can install up to two power supplies in the switch. You must order the second power supply and a power
source cord separately. The power supply slots are numbered 0 and 1, and each slot has a power icon
next to it. The power supplies support front-to-back or back-to-front airow direcons. The power
supplies are fully redundant, load-sharing, and hot-removable and hot-insertable eld-replaceable units
(FRUs) when the second power supply is installed and running. You can remove and replace either one
of the power supplies without powering o the switch or disrupng switch funcons.
Do not mix:
• AC and DC power supplies in the same chassis.
• Power supplies with dierent airow direcons in the same chassis.
• Fan modules with dierent airow direcons in the same chassis.
• Power supplies and fan modules with dierent airow direcons in the same chassis.
This topic describes the AC power supplies that EX4400 switches support.
Characteriscs of the AC Power Supply
The AC power supplies for EX4400 switches come in 550-W, 1050-W, and 1600-W models.
EX4400-24T, EX4400-24X, EX4400-48T, and EX4400-48F switches support 550-W AC power supplies
(see Figure 75 on page 91). EX4400-24P and EX4400-24MP switches support 1050W and 1600-W
AC power supplies. These models support 1600-W AC power supply if you have Junos OS Release
22.3R1 or later installed. We ship the models with one 1050-W power supply. You can order the 1600-
W power supply separately. You must not install dierent models of power supplies in the same chassis.
EX4400-48P and EX4400-48MP switches support 1600-W AC power supplies). The AC power supplies
support IEEE 802.3bt Power over Ethernet (PoE-bt) in EX4400-24P, EX4400-24MP, EX4400-48P, and
EX4400-48MP models.
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