Lucent Technologies -48V CPS4000/CPS4000 PLUS Cabinet Power System
7 - 8 Alarms, Controls, and Displays Issue 13 December 2000
Alarms, continued
Low-Voltage
Disconnect (LVD)
DIP switches in the BSP2/BSP2C circuit pack permit the user to set the
plant voltage at which the plant load is disconnected from the battery.
The disconnect threshold may be set for either 42.5 volts or 40.5 volts.
The 40.5-volt threshold may be used when the drop between the plant
and the load is minimal. The BSP2/BSP2C is installed in the factory and
has a default setting of 42.5 volts.
Rectifier Alarms Whenever the control unit receives a single rectifier alarm, it issues a
Power Minor (PMN) alarm. A yellow LED lights on the control unit
face plate. If the ES646, ES647, ES648A, or the ES648C receives two
or more rectifier and/or converter alarms, it will issue both a Power
Minor (PMN) and a Power Major (PMJ) alarm. Both the yellow PMN
LED and the red PMJ LED will light.
Since a loss of a single rectifier may not necessarily affect the plant
voltage, this condition is treated as a minor alarm. However, if two or
more rectifiers have failed or are in standby (even if they are not
required to power the load), the ES646, ES648A, ES648C, or ES647
issues a PMJ.
With the ES646B, ES648B, and ES648BZ, both single and multiple
rectifier failures result in a PMN alarm and yellow LED lights.
Ringer/Converter
Alarm
Whenever the ES646, ES648A, ES648BZ, or ES647 receive a single
ringer/converter fail alarm, it issues a PMN alarm and the yellow LED
lights on the control unit faceplate. Two or more ringer/converter
failures result in a PMJ alarm.
With the ES648C, both single and multiple ringer/converter failures
result in PMN and PMJ alarms, and the yellow and red LEDs light.
Table 7-G: SW201 LVD Settings
1234 Voltage
On On Off Off 42.5
Off Off Off Off 40.5
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