RE46C145

DS22181C-page 12

 2009-2012 Microchip Technology Inc.

FIGURE 3-2:

RE46C145 Timing Diagram – Local Alarm, Horn and Interconnect Timings.

Local Alarm Timing (not to scale)

STROBE

IRED

LED

No Alarm

Local or Remote Alarm

No Alarm

Horn Temporal Pattern

Horn

Interconnect Timing

IO as Output

IO as Input

Note 1:

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

remote 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.