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Document No: LT0122 F3200 Installation & Programming Manual
Programming System Configuration
Issue 2.7 5 July 2001 Page 7-9
Reset Delay
When an AZC is reset, automatically (during AVF), manually, or from an output logic
command, the AZC is turned off for a period of 5.1 - 5.7 seconds.
7.2.5 VOLTAGE BANDS
The F3200 monitors the AZC voltage and decides the circuit status on the basis of which
one of 5 voltage bands it is in, as shown in Table 7.2.1.
Voltage band B2 (3V to 13V) always generates Alarm (detector operated). B1 (0V to 3V)
and B2 (13V to 17.5V) are programmable as to whether they generate Instant Alarm (MCP
operated), Alarm (Detector Operated), Normal or Fault.
This allows:
1. Detectors with high alarm voltages (13V to 17.5V) to be used by programming B3 to
be Alarm (detector operated);
2. High current mode to be used on detectors with resistive bases (e.g. for LED
brightness, remote LED) even though this may increase alarm voltage above band
B2 if the LED was to become disconnected;
3. MCPs to be distinguished from operated detectors on the same AZC e.g. by
programming B1 to be Instant Alarm for MCPs shorting the circuit.
4. MCPs to be used with a 15V Zener diode (program B3 to be Instant Alarm) so that
MCP operation does not reset an operated detector.
Notes
1. Point 3 above allows operation of a time delay (e.g. AVF) on the detectors, while
MCPs cause an Instant Alarm (i.e. 2 second delay only).
2. If two devices with different Alarm voltages on the same circuit both operate, then the
one with the lowest Alarm voltage will determine the voltage (and hence state) of the
AZC. E.g. for MCPs wired to short a detector circuit, MCP operation will cause the
AZC to see voltage band B1.
Where detector operation has caused Alarm (Detector operated) on the zone,
subsequent MCP operation will not initiate a new event (Instant Alarm) on the same
zone unless the zone has been reset between events.
3. When testing operation of detectors with Auto-Reset mode, the voltage state of the
AZC (B1, etc) is continuously displayed on the LCD (ref Operators Manual, Section
7.4).
4. Programming an AZC for any time delay type (refer to Time Delays in Section 7.2.4)
resets B1 & B3 to the default options for that time delay.