Lucent Technologies -48V CPS4000/CPS4000 PLUS Cabinet Power System
7 - 10 Alarms, Controls, and Displays Issue 13 December 2000
Alarm Processing
Overview The control unit processes alarm conditions and presents them to the
user as front panel LED indicators and Form-C relay contact closures.
The control unit sorts and groups alarm conditions occurring in the CPS
plant into two categories, Power Major or Power Minor, based on their
impact on plant functions.
Power Major
Alarms
Conditions that impact service and require immediate attention are
classified as major alarms and designated as Power Major (PMJ) alarms.
Red LEDs signify major alarms.
Power Minor
Alarms
Conditions requiring service, but having no immediate impact on the
plant output are classified as minor alarms and designated as Power
Minor (PMN) alarms. Yellow LEDs signify minor alarms.
Supplementary
Information
Where feasible, LEDs, indicators, and relay contact closures provide
supplementary information to indicate which specific alarm condition
resulted in the PMN or PMJ alarm.
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