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• The power supplies are 1U, 48V, 1200W
• The supplies provide regulated +48V DC to all other modules in the system.
• Each power supply has self contained fans for cooling.
Fan Trays
Refer to “Installing a Fan Module” on page 41 for installation instructions.
The fan trays are redundant, hot-swappable cooling units.
• Only one fan tray, in either of the two slots, is required to cool the system. However, a blanking
panel is required for any unused bay.
• The replacement of any one fan tray does not disrupt the operation of the device in any way, and
can be successfully completed without having to remove the device from a rack, or disconnect any
cables.
• The fan modules use DC Voltage regulators to control fan speed and contain a hardware fan control
circuit, which controls and monitors the fan speed.
• The fan module will default to full speed after a power-on or reset condition.
• If one the fans fails, the redundant fan will go to full speed (if one is available).
CAUTION: The fan modules do not have guards. Do not remove a fan module completely from the
bay until the blades have stopped moving (approximately 15 seconds).
Management Interface Modules
See Figure 1-2 on page 14 for a diagram of the chassis.
Refer to “Installing a Management Interface Module” on page 50 for installation instructions.
The Topspin 270 supports redundant, hot-swappable Management Interface modules, each of which is
paired to one of the Fabric Controller Core modules.
The Management Interface modules provide the following functions:
• RS-232 serial console port
• 10/100 Ethernet management port
• System real time clock (RTC)
• Intra-system Ethernet switch, which provides a system configuration management data-path to all
fabric modules.
• Provide mirrors of the LED indicators from the front side of the chassis for the power supply, fans,
and over-all system status. (refer to “Management Interface Module LEDs” on page 71).
• Rack Alarm Connection (refer to “Rack Alarm” on page 19).
Figure 1-5: Management Interface Module
Rack Alarm
Ethernet
Port
Serial
Port
Redundant
LEDs
(not supported)