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Figure 4 - Jumper Selection for Isolated or Non-Isolated Current Outputs
PROGRAMMING OPTIONS
DIP switches located on the circuit board are used to “program” various options including:
< channel selection,
< system sensitivity,
< fire area voting logic,
< time delay for fire area alarms,
< relay latching/non-latching selection, and
< relay energized/de-energized selection.
NOTE
Power to the controller must be cycled to make dip switch changes take effect.
EXTERNAL RESET
A normally open, momentary closure switch connected between the external reset terminal and
the negative power terminal provides remote reset.
AUTOMATIC DIAGNOSTICS AND FAULT IDENTIFICATION
The microprocessor-based controller features self-testing circuitry that continuously checks for
problems that could prevent proper system response. When power is applied, the microprocessor
automatically tests memory. In the Normal Operating Mode it continuously monitors the system to
ensure proper functioning. A "watchdog" timer is maintained to ensure that the program is running
correctly.
The main loop of the operating program continuously cycles through the Automatic Visual Integrity
test, checking each detector and its wiring. The microprocessor can be interrupted by