
Lucent Technologies Lineage
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2000 ECS-6U Controller J85501E-1
2 - 12 Product Description
Issue 4 August 1998
occurs when a battery string disconnect switch is turned off
manually or electronically. The Open String alarm (OS) is
passed as a separate alarm to the microprocessor board.
If the OS signal is wired directly to the controller alarm terminal
blocks, it will generate a Minor Fuse Alarm whenever a battery
string is open. Alternatively, OS may be hard-wired to the
auxiliary Major Fuse Alarm input on the fuse alarm board.
Front Panel
Status Indicators
Light-emitting diodes (LEDs) are located on the controller front
panel to indicate the alarm status of the battery plant.
Yellow LEDs indicate the following conditions, including (but
not restricted to) Power Minor alarms:
Minor Fuse Alarm (MNF)
Rectifier Fail Alarm (RFA)
AC Fail (ACF)
Equalize On (EQ)
Microprocessor Alarm (
µ
P)
Datalogger Alarm (DLA)
Red LEDs indicate the following Power Major alarms:
Battery on Discharge (BD)
Major Fuse Alarm (MJF)
When no alarms are present and the controller is powered, the
green NORM LED lights to indicate normal operation. The EQ
(Equalize) LED may be lit when the NORM LED is on since
equalize is not considered an alarm condition. See Sections 4 and
Section 5 for more information on the equalize function.
Front Panel
Meter
A four-digit, backlit liquid-crystal display is located on the front
panel. A toggle switch next to the display selects either the plant
voltage or the plant load current to be shown. A calibration
potentiometer (R407) on the CP4 display board is used for fine
adjustment of the plant voltmeter. See Figure 2-3.
When the meter select switch on the front panel is set in the
AMPS position, the display indicates the plant load current in
amperes. This current is measured with a calibrated shunt
located in the dc distribution return bus or from the AKC1B
shunt isolator circuit pack.