Lucent Technologies 60V Small Broadband Power System J85500Q-1
Issue 4 October 1998
Alarms, Controls, and Displays 6 - 5
Battery on
Discharge (BD)
In the event that AC power is lost, the batteries provide power
for the load. While the batteries are providing the plant's power,
the plant voltage will decrease below the float voltage. The
EBM1 (ACU) monitors the plant voltage and features a BD
alarm. A strap (P1) on the ACU controls the set point for the BD
threshold. Whenever the plant voltage drops below this preset
threshold, the ACU issues BD and PMJ alarms; and the
corresponding red PMJ LED light.
Voltage
Threshold for the
BD Alarm
The voltage threshold for the BD alarm is factory set to 76 ± 1
Vdc.
Low Voltage
Shut Off
Strap STR1 on the BPS allows the user to set the plant voltage at
which the plant load is disconnected from the battery. STR1 is a
three-position strap located above the LEDs. When STR1 is
placed across positions 1 and 2, the shut off voltage is 61 volts.
For a shut off voltage of 64 volts, place STR1 across positions 2
and 3. The factory default setting is 64 volts.
AC Fail
The AC Fail Alarm indicates that ac input power to the rectifier
is missing or has dropped below the minimum ac voltage for the
operating range being used. This alarm results in an isolated
transfer contact for the office alarm system. An ACF alarm also
results in a PMJ alarm; thus both the PMJ and ACF LEDs will
light on the ACU.
Table 6-B: Office Alarm Assignments (TB1)
Pin Number
Office Alarm
1
PMJ - NO
2
PMJ - C
3
PMJ - NC
4
ACF - NO
5
ACF - C
6
ACF - NC
7
R OS IN
8
PBT IN
9
OS - PBT - RTN
10 - 12
Unassigned
