Data Sheet

Systems | EA120B Alert Unit
The EA120B Alert Unit communicates with the
transponder through the multiplex (MUX) bus. It activates
siren and strobe units or other switched devices during an
alarm. The alert unit also reports tampering, AC power
loss, and backup battery level to the transponder.
System Overview
During an alarm, the EA120B Alert Unit receives a signal
from the transponder and sends power to the siren and
strobe (or other switched device). The siren and strobe
remains active until the alarm is resolved at the central
console.
Functions
Backup Battery and Microprocessor
The EA120B Alert Unit has both backup battery power and
AC power. The EA120B Alert Unit driver contains a
microprocessor that communicates with the transponder
for strobe and siren commands, status reports, and
trouble indications. The troubles monitored are Tamper,
Loss of AC Power, and Low Battery.
Test Acknowledgement
You can configure the EA120B to cause a siren to emit a
short tone and the strobe to flash to indicate a successful
transmitter test.
Installation/Configuration Notes
Compatibility Information
Central Console Software: SE2000 Series
Receivers: EA102A‑304
Transmitters: SE2 Series, SE3 Series, SE3401, and
SE88 Series
Transponder: EA500B
EA120B Alert Unit
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Annunciates an alarm through the siren, strobe, or
other third party switched device
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Sends output to the siren and strobe to indicate a
successful transmitter test
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Is compatible with indoor enclosures
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Is compatible with outdoor enclosures
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Uses AC power with battery backup
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Responds to central console commands sent through
the transponder
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