Juniper EX4400 - Page 175

Figure 102: Connect Power to an EX4400 Switch with a DC Power Supply
5. Connect the power cord to the power source. The EX4400 switch powers on as soon as power is
provided to the power supply. There is no power switch on the EX4400.
We’ve designed the EX4400 switch to operate with a DC power supply that has a single,
nonredundant feed input. For source redundancy, you must install two DC power supplies in the
EX4400; connect one source to one power supply and connect another source to the second power
supply. This conguraon provides the commonly deployed feed redundancy for the system.
6. Close the input circuit breaker.
7. Verify that the DC.OK LED on the power supply is lit steadily green. If it is not, disconnect the power
supply from the power source, and replace the power supply (see "Maintain the EX4400 Power
System" on page 200).
CAUTION: Do not remove the power supply unl you have a replacement power
supply ready: you must install the replacement power supply within one minute aer
removing the failed power supply to ensure proper airow and prevent chassis
overheang.
Connect the EX4400 to External Devices
IN THIS SECTION
Connect a Device to a Network for Out-of-Band Management | 168
Connect a Device to a Management Console Using an RJ‑45 Connector | 169
Connect an EX4400 Switch to a Management Console by Using the USB-C Console Port | 170
167