Ronan X16PDM - Manual (Page 38)

Rev 1.0 Series X11CA Hardware Manual
3. Event Sequences
Hardware Control-© 2002 Ronan Engineering 34
3.4.4 F2A -1
First out automatic reset.
The first alarm operates as a basic Sequence A. subsequent alarms operate as a
status lamp and also activates the audible devices. Option 1 must be used to
enable the apparent operation of the audible for subsequent alarms. Subsequent
alarms are locked-in and cannot return to the normal state until the Acknowledge
pushbutton is activated, resetting the first out-alarm. After the inputs return to
normal and acknowledgement, all input points return to the normal sequence state
automatically.
Key applications:
1. First-out Alarm is of prime importance.
2. Subsequent alarms must lock-in and resound the audible if it has been
silenced.
3. If Option 1 is used, the number of concurrent alarms expected is small
enough that flashing is not required to locate each new subsequent
alarm when the audible sounds.