EX4400 power supply
550 W AC front-to-back airflow
Each power supply has its own fan and is cooled by its own internal cooling system.
Front-to-back—that is, cold air enters the chassis through the vents on the front panel of the chassis and hot air exhausts through the vents on the rear panel of the chassis, indicated by the AIR OUT label and the Juniper Gold handle.
Power supplies for EX4400 switches are fully redundant, load-sharing, and hot-removable and hot-insertable FRUs when the second power supply is installed and running. You can remove and replace either one of them without powering off the switch or disrupting switch functions.
We ship the EX4400 switches with one power supply installed in the rear panel of the switches. You can install up to two power supplies in an EX4400 switch. The power supply slots are numbered 0 and 1 and each slot has a power icon next to it.
Do not mix:
• AC and DC power supplies in the same chassis.
• Power supplies with different airflow directions in the same chassis.
• Fan modules with different airflow directions in the same chassis.
• Power supplies and fan modules with different airflow directions in the same chassis.
1 — Power supply handle
2 — Power supply inlet
3 — Power supply ejector lever
