SETRONIC Verona
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In th e T Rx u n i t th e T ran s mitt e r e m it s t wo mod u lat ed 1 KHz i n f rar ed
lig h t b ea m s a s t wo c on e s wh ich cro s s h e en vi ron m en t t o b e
mon ito re d . Th e s e b e a m s re ach th e r efl ec t or u n ti l an d ar e
tran s mi tted b a ck to th e R ec e i ve r. Th e c ro s si n g of th e en vi ron m en t
b y th e t w o in fr ar ed b ea m s me an s al l th a t h ap p en s b et w ee n can b e
mon ito re d a s th e in fo r ma tion i s co n tin u ou sly re c ei v ed th a t c ou ld
in d i cat e t h e s tar t o f a fi re .
Th is o ccu r s b y m ean s of op tic al d e mo d u la ti on o f th e in fra r ed
fr equ en cy ca rr ie r, in both f req uen cy an d amp litu de , and
mi cr op ro c e s sor man ag e r th at r e c ei v e s th e in fo r ma tion n e c es s ary t o
d et e ct t h e sta rt of a fir e d i s tin gu i sh in g th i s in f or ma tion f ro m t h at
of a n ob st ac le or a w eak en i n g of s ig n al d u e to d i rt on th e op tic s .
Th e st atu s o f th e d et ec tion i s s en t b y th e T Rx t o th e con t rol u n i t b y
m ean s of th e R S4 85 l in e an d it i s th e r e mad e a v aila b l e b y t wo c l ean
con ta ct s (a lar m an d f au lt ) th a t c an b e ma n ag ed b y a c en t ra l
si gn a ll in g an d con t ro l s ign a l u n it . T h e sy st e m’ s work in g st atu s i s
in d i cat ed on th e con tr ol u n i t b y th e d i sp lay an d r ep eat ed on t h e
LED s o n th e d et e ctor .
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Summary of Contents for ILIA-OZ
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