the AC sour ce is low vol tage (19Vac), in sulation tran -
sformers should be used, 20V: 20V of at least 80VA.
The length of the con nection and the pos sibility that
each de vice can use a maximum current of 1A must be
considered in the connection to the 19Vac power sup -
ply; in any case the section of the wi res must not be
less than 1.5mm
2
.
Note:
The cable which car ries the bar rier sup ply from
the transformers to the battery heads must be shiel ded
and the shield must be con nected to the ground.
Connection of the backup bat tery
Inside each transmitter and re ceiver unit the re is a spa-
ce for in stalling a re chargeable bat tery of 12V 2,1
Ah. The battery is charged by the sup plier inside each
head and it is connected to it by red and black wi res
with sup plied with clips wi red to the wire ter minal. This
battery, when the re is no mains supply, allows an au to-
nomy of over 36 hours to the de vice (when ful ly char -
ged). If a greater au tonomy is ne cessary, a larger
power supply should be installed very closed to each
device. The connection of the se power supply units
should be done at the terminals of the de vice marked
with the sym bols of - and + 13,8 VDC. The si zing of
these groups should done con sidering that the DC cur -
rent drawn by each single re ceiver or transmitter unit
is 70mA ap prox., in cluding the cur rent drawn by the
bac kup bat te ry.
The fol lowing in for ma tion de scri be the wi ring and the
alignment of the barrier. Please read carefully the in-
for ma tion about the con nec tor J2.
HE400T Trans mit ter
MS1
: terminal block of TX printed board
VAC0/VAC1
: power sup
ply, connect the 19 VAC
output of the tra sformer.
PT0/PT1
: tam per cir cuit out put N.C., for pro tection
against unaut ho ri zed ope nings, mo ve ments or tam pe -
ring. In nor mal conditions the re is a NC circuit (0 ohm)
voltage free. The ope ning of the contact is de termined
by a mo vement of the TX unit (by AMP1) or af ter a re -
moval of the head cover (change of state of the switch
connected to J3).
SYNC
: With JP1 clo sed (de fault) in this block the re is
the si gnal for synchronizing ot her TX units when two or
more TX de vices are wor king near as in the case of a
two le vels pro tec tion.
-TX Mas
ter
: clo
se JP1 and make a con
nection
between the terminal SYNC of the TX Mas ter to the ter -
minal SYNC of the TX Slaves.
-TX Sla ve
: open JP1 and make con nection the termi-
nal SYNC of TX Sla ve to the terminal SYNC of TX
Mas ter.
Im por tant!:
- do not make any con nection to the terminal SYNC if
the syn chro ni za tion fea tu re is not used.
- Use max three TX Slave with each TX Master, to tal
length 60m max. (to tal) of wire con nection (ca pacitan-
ce not hi gher than 150 pF/m).
- The TX Slave units, when syn chronized, use the same
frequency of the TX Master.
- Con nect to gether GND ter minals of TX Mas ter and TX
Sla ves.
JP1
: jum per set ting for TX Master or Slave. See SYNC
de scrip tion, con nec tor MS1.
AMP1
: mo vement sensor de vice. See PT0/PT1 de-
scrip tion, con nec tor MS1.
J3
: mi croswitch con nec tor against unaut ho ri zed ope-
nings of the cover of the head. See PT0/PT1 descrip-
tion, con nec tor MS1.
D22
: gre en LED, mo nitors the 19Vac power sup ply
presence. Without the power supply and with the bac-
kup battery in stalled, the LED is tur ned off but the devi-
ce con tinues to work nor mally.
D21
: red LED, TX mo nitors the oscil lator. With the
oscillator wor king cor rectly the LED is tur ned off. In
case of an oscillator trouble, the LED is tur ned on. It is
Model HE400 mi cro wa ve barrier
DT01142 - Page 5
Fig. 9: Transmitter unit cir cuit board
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