Release circuits
Zone relay
Automatic delay timer
Prerelease circuits
Selectable
automatic delay time
(10 to 50 seconds)
[1] [4] [5]
[1] A detector signals the first alarm. This event
simultaneously activates the:
• Zone relay
• Strobe circuit (on steady)
• Horn circuit alert tone (15 pulses per minute)
[3] Ten seconds before the automatic delay timer expires, the horn
circuit changes to the release tone (steady).
[2] A detector in the protected area signals a second alarm and
meets the AND group conditions.* After a ten-second delay,
the automatic delay timer starts its countdown and the horn
circuit changes to the prerelease tone (60 pulses per minute).
*AND group and matrix group conditions depend on
programming.
[2]
[5] A manual reset at the fire alarm control panel deactivates the release
solenoids and the Releasing Module returns to the normal state.
[4] The automatic delay timer expires and the release circuits activate.
Time line (see details below)
[3]
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