Cabletron Systems 9C214-1 Installation Manual

Contents

3-1Chapter 39C214-1 Power Supply OperationThe 9C214-1 power supply can operate with input voltages ranging from 100–250VAC at 50/60 Hz. Each 9C214-1 provides a maximum of 1000 watts of power tothe SmartSwitch 9000.When two power supplies are installed, the system uses a current-sharing schemewhere, under all load conditions, each supply provides 50% (± 5%) of the requiredload.Each 9C214-1 power supply converts the 100–250 VAC to three different DCoutputs for internal use by the system:• 57 volts supplied to the 48 volt DC System Power Bus for use throughout thechassis for each installed module and the Environmental Module system fans.• 5 volts supplied to the Diagnostic Power Bus used by the diagnostic controllersand the Environmental Module.• 3.3 volts supplied to the INB Termination Power Bus.Operating FunctionsThe 9C214-1 power supply includes the following functions:• System Diagnostic Controller• Internal Temperature Sensor• Power Supply CoolingSystem Diagnostic ControllerThe System Diagnostic Controller is composed of a Z-80 microprocessor and itssupporting logic. The System Diagnostic Controller monitors the power supply’sinput and output power parameters, as well as the temperature and fan status. Inaddition, the System Diagnostic Controller adjusts fan speed and controls the