3-3
The selectable IDC types are as follows:
Fire Monitor - For this point type, an alarm is defined as a direct short or
current-limited condition across the initiating device circuit. An open circuit is a
trouble condition.
Alarm Verification - This point type causes an immediate alarm with a direct
short across the IDC. If current-limited circuit condition exists, the alarm
verification sequence is started. An open circuit is a trouble condition.
Fire/Supervisory - This point type initiates a supervisory service condition at the
fire alarm control panel if a current-limited state is detected. A direct short is an
alarm. An open circuit is a trouble condition. The supervisory status latches until
cleared and reset. If a short circuit or an open circuit occurs before the supervisory
status clears, the supervisory indicators remain on until “SYSTEM RESET” is
pressed and the point is normal.
Trouble - This point type does not cause a fire alarm in the system. A short,
current-limited condition or an open circuit results in trouble. Most trouble
conditions in the system clear automatically when the abnormal condition is
corrected. “SYSTEM RESET” is not required except on Class A circuit
Troubles.
Style C - Style C IDCs indicate a trouble if an open circuit or short circuit
condition is present on the zone loop. A current limited condition causes an
alarm.
Continued on next page
System Modules (Continued)
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