Dc Power Supply; Reset Button - Foundry Networks Switch and Router Installation And Configuration Manual

NOTE: When you power on a device that requires multiple power supplies, make sure you apply power to all the
supplies (or at least the minimum number of supplies required for your configuration) at the same time.
Otherwise, the device either will not boot at all, or will boot and then repeatedly display a warning message stating
that you need to add more power supplies.

DC Power Supply

The NetIron Internet Backbone router and BigIron Chassis device support an optional 500 watt DC power supply.
The DC power supply provides -48VDC current to the chassis. You can power a 4-slot or 8-slot chassis entirely
with AC power supplies, DC power supplies, or a combination of AC and DC supplies. For example, if your
primary power source is AC but you want to provide DC backup, install AC supplies and DC supplies in the same
chassis.
The DC power supply has an input voltage of -36VDC to -72VDC (-48VDC nominal) and operates at an efficiency
of 80% or better. The storage temperature range is -25° – +85° C. See "Hardware Specifications" on page D-1
for additional hardware specifications.
NOTE: The DC power supplies should be set up on a circuit of 15 amps or greater.
Temperature Sensor
The redundant management modules contain an on-board temperature sensor. The software reads the sensor
based on the chassis poll-time, a configurable parameter that determines how often the software polls the chassis
for hardware status information.
The software is configured with a warning temperature (default 45 degrees Celsius) and a shutdown temperature
(default 55 degrees Celsius). When the software reads the temperature sensor, if the temperature equals or
exceeds the warning or shutdown temperature, the software does the following:
• Warning message – If the temperature of the module reaches the warning value, the software sends a Syslog
message to the Syslog buffer and also to the SyslogD server, if configured. In addition, the software sends an
SNMP trap to the SNMP trap receiver, if you have configured the device to use one.
• Shutdown – If the temperature matches or exceeds the shutdown temperature, the software sends a Syslog
message to the Syslog buffer and also to the SyslogD server if configured. The software also sends an
SNMP trap to the SNMP trap receiver, if you have configured the device to use one.
If the temperature equals or exceeds the shutdown temperature for five consecutive polls of the temperature by
the software, the software shuts down the module to prevent damage.
For more information and configuration information, see "Temperature Sensor" on page 5-33.

Reset Button

The reset button allows you to restart the system. The reset button is recessed to prevent it from being pushed
accidentally.
• For Stackable devices, the reset button is located to the right of the serial port as labeled in Figure 9.12.
• For Chassis devices, the reset button is located to the right of the serial port on the management module as
labeled in Figure 9.11.
December 2000
Hardware Overview
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