3Com MSR 50-40 ROUTER. Installation Manual

Also see for MSR 50-40: Safety information Release note

Contents

3Com MSR 50-40 ROUTER. Installation Manual Manual pdf 23 page image

1-13You can connect a PSU to the backplane by inserting it from the rear of the router chassis. It is hotswappable and its switchover does not affect the ongoing system operation.When installing your router in a communications equipment room, ensure that the AC power distributioncabinet can provide a lightning protection box or arrester against the current of 20 KA and above.AppearanceFigure 1-11 AC-input PSUFigure 1-12 DC-input PSULEDTable 1-13 PSU LED descriptionLED MeaningALM (red) ON means the PSU is not well-seated or has failed.RUN (green) Steady ON means the PSU is operating normally, and OFF means thePSU has failed.AC/DC OK (green) PSU input LED. Steady ON means the normal voltage is inputting, andOFF means the opposite.FAN ModuleFunctionsThe MSR 50-40 is configured with six fans; the MSR 50-60 is configured with eight fans. These fans areworking in pairs and the two fans in each pair are working in redundancy. When all these fans areworking normally, the operating temperature of the system can be maintained between 0°C and 55°C(32°F to 131°F). As the failure of a fan does not affect the operation of other fans, the normal operatingtemperature of the system can maintain. The routing speed of the fans is adjusted by the fan controlleron the main control board and between 50% and 100% depending on the system temperature. Whenthe system temperature rises above the high-temperature threshold set by the fan controller, the fansare rotating at full speed (100%); when the system temperature drops below the low-temperature