Notes on the above listed sig nals
- The voltage pre sent on pins 1-2 is also used on the
MS2 con nec tor for re char ging the bac kup bat te ry.
- The si gnal on pin 3 must be mo nitored in tho se parti-
cu lar cri ti cal in stal la tions whe re it can hap pen to have
a strong si gnal re flec tion. In nor mal in stal la tion con di -
tions, it is suf ficient to align the units using a digital
voltmeter con nected to pin 8 (AGC) and pin 2 (GND).
- It is pos sible to con nect a LED with low current con -
sumption (2 mA) di rectly to pin 6 in or der to mo nitor
the alarm out put. Con nect to this pin loads lower than
5mA.
- The AGC si gnal on pin 8 must be mea sured with a di-
gital voltmeter. Wait at least for 10 se conds betwe en
each alignment test in or der to consider valid the mea -
su re.
PT4
: Trimmer for adjusting the RX speed de tection:
turn clockwi se to lower this pa rameter and on the op -
posite for in creasing it (see on the printed circuit for re -
fe ren ce si gnals).
PT5
: Trimmer for adjusting the RX sensitivity: turn
clockwise to lower this parameter and on the op posite
for in creasing it (see on the printed circuit for re feren-
ce si gnals).
MS2
: con nector for the bac kup bat tery; con nect the
12V 2.1A re char geab le bat te ry fol lowing the po la rity
indications marked on the printed circuit; the F1 fuse
(1A) is in se ries with the po sitive of the battery.
The bat te ry is au to ma ti cal ly char ged by the sup plier
inside each head. This battery gi ves the RX an auto-
nomy of over 36 hours in case of mains fai lure.
F1
: Battery protection fuse. See MS2 de scription.
U2
: TO- 220 vol ta ge re gu la tor, pro vi des vol ta ge re fe -
rence (13,8 VDC). TO- 220 me tal case is in sulated
from the me tal case.
Model HE400 mi cro wa ve barrier
DT01142 - Page 7
DOCU MEN TAZI ONE TEC NICA
TECH NI CAL DOCU MEN TA TION
Fig. 10: Re ceiver unit cir cuit board
