Juniper Networks 5000 NetScreen-5200 Power Recommendations, NetScreen-5400 Power Recommendations

Power Supplies

POWER SUPPLIES

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.

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.

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.

Warning: You must replace the failed power supply as soon as possible; otherwise, system damage can occur. See “Servicing the Device” on page 35 for instructions on how to replace a power supply.

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.

NetScreen-5000 Series 3