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PAK200838_03A Feb 2019 ©2019 ELMDENE INTERNATIONAL LTD
O
PERATION
The SI500 sounder is used for notification of an alarm condition as generated within an intruder, hold-up
or other alarm system. In response to commands from the alarm system control panel, the SI500 will
emit a high intensity sound.
The SI500 will detect any attempt to gain unauthorised access to the sounder by removal of the cover.
This will generate a tamper signal* which is normally fed back to the alarm control panel.
The SI500 is classified as a self-powered sounder and has an on-board battery which is recharged via the
external power source. This battery is used to operate the sounder if the external power is removed.
The SI500 is designed to sound when the BL+ (Blocage) input is removed or connected to 0V.
* The SI500 is a Security Grade 2 product
–
loss of ALIM/Hold-off (charging supply) will cause the sounder to self-activate, but a tamper
signal is not generated. A tamper signal is only generated in the event that the cover is unscrewed/removed.
FUNCTIONAL
I
NFORMATION
Tamper Circuit
The SI500 sounder is provided with a tamper output to detect opening of the cover.
(See figure 2 for details of tamper connections.)
T
IMER
O
PTIONS
S
ELECTION
Table 1: Timer Duration Selection Links
KEY
Link FITTED
Link NOT FITTED
Sound Cut-Off Timer
T2
T1
5 sec.*
90 sec.
3 min.
15 min.**
*
This cut-off time option intended for installation purposes only.
**
Factory default setting.
Response to a fault in the primary power supply (ALIM +/-)
If the primary power supply develops a fault or is deliberately disconnected, the siren is activated for a
time depending on the setting of the ringing time
Sound Cut-off Timer
The SI500 sounder will automatically stop sounding after the time period selected by the Sound Cut-off
Timer link, Table 1, irrespective of the status of the sound trigger (BL+) input. The 5s option is provided
to reduce nuisance noise during testing
