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Alarm and shutdown thresholds of the modular (arctic) DC power sub-system on CRS

The modular (arctic) power-subsystem accepts input DC power in the range from –40 to –72 VDC. Alarms are generated accompanied by a corresponding syslog message if certain thresholds are crossed. 

Minor: -44V
Major: -42V

The following example displays a minor alarm message if the "Minor" threshold is crossed:

envmon[117]: %PLATFORM-ENVMON-4-ALARM : MINOR alarm generated by voltage 43442mV since it is less than 44000mV on Power Shelf A - PEM A1-INPUT1 , check battery”

 

The shutdown thresholds are as listed below:


SW shutdown: -40.75V
HW shutdown: -39.5V

 
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