Cabletron Systems 9C214-3 Installation Manual

Contents

9C214-3 Power Supply Operation3-2System 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 theLANVIEW diagnostic LEDs. The information gathered by the System DiagnosticController is available to the network manager via the LCD, as well as via localand remote management. If the System Diagnostic Controller fails, the 9C214-3power supply has been designed to continue to function and supply power to thesystem.Internal Temperature SensorEach 9C214-3 power supply has a built-in temperature sensor for monitoring itsown internal temperature. The results of the monitoring are available to thenetwork manager via LCD, as well as local and remote management.Power Supply CoolingEach 9C214-3 power supply includes an internal cooling fan. The SystemDiagnostic Controller monitors the internal temperature of the power supply andincreases or decreases the fan speed based on that temperature. If the SystemDiagnostic Controller fails, fan speed defaults to 100% to ensure protection of thepower supply.LANVIEW LEDsThe LANVIEW LEDs on the back of the 9C214-3 power supply may be used as anaid for troubleshooting.There are three LANVIEW LEDs visible to the user (Figure 3-1): the PWR StatusLED, the SMB Status LED, and the Power Supply Level Indicator LED.Figure 3-1. 9C214-3 Power Supply LANVIEW LEDs9C214-3100%50%0%LoadPOWER SUPPLY MODULESTATUSPWRSNBPWR STATUS LED SMB STATUS LEDPower Supply Level Indicator LED