Lucent Technologies -48V CPS4000/CPS4000 PLUS Cabinet Power System
Issue 13 December 2000
Alarms, Controls, and Displays 7 - 11
Alarm Processing, continued
Plant Alarm
Conditions and
Alarm Indications
The ES646, ES646B, ES648 MCUs, and the ES647 ACU provide the
same basic alarm functions; the ES646, ES646B, and ES648 MCUs,
however, offer additional alarm LEDs and a front panel display with a
toggle switch to display primary voltage or current; they also send two
voltages that are proportional to the plant’s voltage and load current to
the office alarm connector.
The ES646, ES646B, and ES648A/B/C/BZ differ in alarm schemes and
alarm presentation.
•
The ES646B, ES648B, and ES648BZ replaces the “Two AC Fail”
alarm with a “Low-Voltage Alarm” and defines a Battery on
Discharge alarm as simply a battery on discharge alarm without a
corresponding power major alarm. In addition, the ES646B,
ES648B, and ES648BZ issue certain alarm conditions as either
minor or major; the ES646 and ES648A issue both a major and
minor.
•
The ES648C issues power major and power minor alarm when at
least one installed ringer or converter has failed or is in the Standby
mode. The ES648C replaces the “Major Fuse” alarm with a “Ringer
or Converter Fail” alarm on the office alarm connector.
Table 7-H summarizes plant alarms and alarm indications (i.e., contact
closures and/or LEDs) of the control units.
