Edwards Signaling eFSA250 - Manual (Page 273)

Appendix D: Applications
E-FSA64 and E-FSA250 Technical Reference Manual 261
Correlated zone and system alarm signaling
applications
Correlated signaling applications are those in which sounder bases are triggered
by associated correlation groups. This includes zone alarm and system alarm
signaling applications. Detectors are added to the input side, and polarity
reversal modules s are added to the output side of one or more correlation
groups.
Zone alarm signaling applications
What is zone alarm signaling?
In zone alarm signaling applications, detectors and sounder bases are grouped
by zone. All sounder bases within a zone automatically sound alarm signals
when any detector in the zone initiates an alarm event.
Since alarm signals are limited to the same notification zone, signal
synchronization is not required. 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 34 and on page 92.
Typical wiring for zone alarm signaling
The 24 VDC riser that supplies power to the sounder bases is supervised using
an IDC1B Single Input module and a 24 VDC Control Relay.