Appendix D: Applications
250 Vigilant VS1 and VS2 Technical Reference Manual
Inputs: Zone 1
Outputs: The polarity reversal or CT1 module labeled ZONE_1 SOUNDERS
System alarm signaling applications
What is system alarm signaling?
In system alarm signaling applications, all sounder bases sound when any alarm
signal-initiating device is activated. Signal synchronization is required because alarm
signals are not limited to the same notification zone.
The sounder bases, once activated, continue to sound an alarm signal until:
• Smoke is cleared from the active detectors and the control panel is reset
• Signal Silence is pressed
• The control panel’s Auto Signal Silence timer expires, if programmed. This can be
from 5 to 30 minutes
• The in-suite signal silence timer expires, if programmed. (See “What is in-suite
signal silence?” on page 33 and “Programming in-suite signal silence” on page
83.)
Typical wiring for system alarm signaling applications
The figure below shows the typical wiring for synchronized system alarm signaling.
A is required to supply power to the sounder bases regardless of riser polarity.
Typically, the 24 VDC riser that supplies power to the sounder bases is supervised
using an RM1 Riser Monitor module. You can also use a CT1 module and a PAM-1
control relay for this purpose. In addition a G1M-RM is required for synchronization.
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