Power supplies, Netscreen-5200 power recommendations, Netscreen-5400 power recommendations – Juniper Networks 5000 User Manual
Page 11: Ower, Upplies
Power Supplies
NetScreen-5000 Series
3
P
OWER
S
UPPLIES
The NetScreen-5000 Series can use two kinds of power supplies:
•
Direct Current (DC) Power Supply
•
Alternating Current (AC) Power Supply
The slots for these power supplies are located in the back of the NetScreen-5200 and on
the front of the NetScreen-5400.
When two or more power supplies are in service, they share the power load equally. The
power supplies are hot-swappable, so you can remove one and replace it without affecting
device operation. Each power supply is intended to receive power from separate feeds.
When one power supply fails, the other(s) automatically assume the full load and the
device logs a system alarm. This alarm is viewable through the WebUI or a console
accessing the NetScreen Command Line Interface (CLI). The Alarm LED on the
management module glows red in response to any power supply failure.
NetScreen-5200 Power Recommendations
Although the NetScreen-5200 can run with one power supply, it is advisable to install
both. This practice minimizes the likelihood of system failure due to individual power
supply failure.
When either power supply fails, the Alarm LED on the management module glows red. If
both are operational, then the Alarm LED is off. For more information on power supply
LEDs, see Appendix B,
Port Descriptions and LED Status
.
NetScreen-5400 Power Recommendations
When the NetScreen-5400 contains only two modules, it can operate with one power
supply. However, if the system contains three or four modules, the system requires at
least two power supplies. In either case, it is advisable to install all three power supplies.
This practice minimizes the likelihood of system failure due to individual power supply
failure.
When any power supply fails, the Alarm LED on the management module glows red.
While all three are operational, the Alarm LED is off. For more information on power
supply LEDs, see Appendix B,
Port Descriptions and LED Status
.
Note:
You can order a NetScreen-5000 Series that runs on DC power. For DC-powered
units, the power supply has a DC terminal block with three sockets.
Warning:
You must replace the failed power supply as soon as possible; otherwise, system
“Servicing the Device” on page 35
for instructions on how to replace
a power supply.