Installation Guide

• 16-slot router: Can accommodate eight 1200W or 1800W AC and DC power supplies. Because power is supplied over a
common power bus, any power supply installed in addition to the minimum required provides backup for any power supply that
fails. For power redundancy, you must purchase additional power supplies depending on how you populate your router. For
determining the number of power supplies required for redundancy, refer to the "Hardware Specications" in this
documentation.
NOTE
1800W AC power supplies support low and high line operation. For line voltages between 90 - 180, the power supply
operates at 1200W. For line voltages between 180 - 264, the power supply operates at 1800W.
• 32-slot router: Supports 2100W AC, 2400W AC and DC, and 3000W AC and DC models. Accommodates eight power
supplies. Because power is supplied over a common power bus, any power supply installed in addition to the minimum
required provides backup for any power supply that fails. For power redundancy, you must purchase additional power supplies
depending on how you populate your router. For determining the number of power supplies required for redundancy, refer to
the "Hardware Specications" in this documentation.
Power supply interoperability
For MLX Series routers, power supplies for the 4-slot, 8-slot, and 16-slot devices are interchangeable. Power supplies for the MLX
Series 32-slot devices cannot be used in MLX Series 4-slot, 8-slot, or 16-slot devices.
For power supply
specications, refer to Power specications on page 271.
Power supplies are installed in slots along the bottom of 8-slot, 16-slot, and 32-slot routers. Power supplies are installed in slots in the
rear of 4-slot routers.
Power supplies provide power to all router components, share the workload equally, and report status to the management module. If the
management module detects that a power supply has failed or overheated, the management module redistributes the workload of the
failed power supply to the remaining power supplies.
Power supplies generally have three LEDs on the faceplate that provide status for input power, output power, and notication of alarms. If
the input power and output power LEDs are on (steady green), the power supply is providing power to the router components. For more
information about power supply LEDs, refer to the AC and DC power supply sections in Observing the LEDs on page 172.
NOTE
After a power supply is removed from a router, the software determines if there is enough power to operate all of the interface
modules. If there is not enough power, some interface modules will be powered o.
NOTE
If you want to perform a hitless upgrade, replace one power supply unit at a time, and make sure the device has at least +1
redundancy at all times.
CAUTION
Remove the power cord from a power supply before you install it in or remove it from the device. Otherwise, the power
supply or the device could be damaged as a result. (The device can be running while a power supply is being installed or
removed, but the power supply itself should not be connected to a power source.)
NOTE
In the 32-slot router, you cannot unlatch and remove a power supply without rst releasing the cord retainer and removing the
power cord.
MLX Series router modules
Extreme Routing MLX Series Hardware Installation Guide
80 9035627-01