Figure 1 Connectors and jumpers on the printed circuit board
OPTIONAL FUNCTIONS (JUMPER SETTINGS)
There are 5 jumpers on the printed circuit board, numbered as in Figure 1, to select optional siren
functions as follows:
JP1 – FLASH ENABLE Leaving JP1 installed allows external flash control through the EXT FLASH
CMD input. In this case the lamp will produce flashes during the active level
of this signal. Removing JP1 results in internal control of the flash only,
while the EXT FLASH CMD input can be used for resetting the alarm
memory.
JP2 – SIREN FUNCTION Leaving JP2 installed allows simplified 2 wire connection of the siren
(SUPPLY VOLTAGE and GROUND). This way, the siren is triggered by a
drop in the supply voltage and remains in the alarm mode until the supply
voltage is restored (or until a discharged battery threshold is reached to
protect the charging circuit). If JP2 is removed, the system works on full
connection. In this case:
!if the alarm is triggered by a drop in the supply voltage, the siren enters
the alarm mode for 5 minutes. If the supply voltage has not been
restored after the 5 minutes passed, the siren will only follow the TRIG
input. A new 5-minute alarm will be generated only in case of supply
voltage restoration and its subsequent loss;
!if an external loop unbalancing occurs, the siren remains in the alarm
mode as long as the loop stays unbalanced (or until a discharged
battery threshold is reached, to protect the charging circuit). If during
this period a drop in the supply voltage also occurs, the siren re-enters
the stand-by mode after 5 minutes, even in the condition in which the
supply voltage was not restored.
JP3 – ALARM MEMORY Leaving JP3 installed activates the alarm memory function. In this situation,
any event that has generated an alarm longer than 50 sec. is signaled by
two successive, short flashes occurring approximately every 17 sec., until
reset. Resetting the alarm memory can be performed either by an alarm
shorter than 50 sec., or by an active edge on the EXT FLASH CMD input.
Removing jumper JP3 disables the alarm memory option.
JP4 – TEST The existence of this jumper determines the flash periodical signal of the
system status. Its absence will not disable the auto-testing but inhibits the
flash signal.
JP5 – TRIG POLARITY This 2-position jumper selects the active polarity of the external trigger
signal accordingly:
JP5 –positive trigger JP5 –negative trigger
SYSTEM FUNCTIONING
Upon powering as well as when exiting the SERVICE mode, the system will test and memorize the status
of configuration jumpers.
If any of the following conditions are not satisfied when powering, the system will periodically signal by low
intensity acoustical signals about every 17 seconds:
!the battery is properly installed
!positive voltage of 13.8 – 14.6 V DC is present on the SUPPLY VOLTAGE input
!the TRIG input is not enabled.
When all the above conditions have been satisfied, 4 low frequency acoustic signals followed by a flash
will signal entering the normal functioning mode.
The above tests are periodically repeated, every 17 or 35 seconds, according to the alarm memory. The
result of this test determines the flash signaling mode of the siren status, which is:
- a flash about every 35 seconds in case of system normal functioning and there is no alarm
memory
- 2 flashes every 17 seconds in case one of the above conditions is not satisfied and there is
alarm memory
- 3 flashes every 17 seconds if the system is normally functioning and there is alarm memory.
If one of the conditions is not satisfied and there is no alarm memory either, the flash signal will be absent.
The same will happen if jumper JP4 is not connected and there is no alarm memory irrespective of the
system status.
In case jumper JP3 is not connected, the alarm memory will not be signaled either.
While functioning, alarm included, the system is monitoring the battery existence. If it is disconnected, the
system will signal an abnormal status (low-intensity acoustical signals every 17 seconds), awaiting all
conditions to be satisfied, like in the case of powering the system.
The charging status of the battery is also permanently monitored, the system keeping it between 13.8.and
12.5V. If the system detects battery discharged under a minimum limit (going beyond that limit destroys
the battery) during an alarm or while flash lighting up upon external command, the great power
consumers (horn, flash). For 18 minutes the system will only charge the battery.
Note: these 18 minutes are real charging time, so they are counted only if there is external power supply.
All this time the flash signal of the alarm status and memory is inhibited.
The system is provided with a quick 3.15A fuse to protect against battery reverse connection.
In case the system will not enter the normal functioning mode after the supply voltage and the
battery was connected, check the fuse status.
Warning: In case of burnt fuse, it will be replaced only with a similar 3.15A one with quick action.
