RE46C144

DS22180C-page 12

 2009-2012 Microchip Technology Inc.

FIGURE 3-2:

RE46C144 Timing Diagram – Local Alarm, Horn and Interconnect Timings.

Local Alarm Timing (not to scale)

STROBE

IRED

LED

Horn Timing

No Alarm

Local or Remote Alarm

No Alarm

Horn

Interconnect Timing

IO as Output

IO as Input

Notes:

1. Smoke is not sampled when the horn is active. Horn cycle is self-completing in local alarm.

2. Low battery warning chirp is suppressed in local or remote alarm

3. IO Dump active only in local alarm, inactive if external alarm