- 6 -
1 - 1,2 mt
BM60M e BM60M WS : max 60 meters
BM120M : max 120 meters
BM200M : max 200 meters
3 meters
3 meters
The sensitive zone shown in the drawings is to
be taken into consideration, as a big target.
Overpassing this area might cause the
same perturbations as a small body
passing the alarm area, that’s to say might
cause false alarms.
BM60M - BM60M WS
6,5 meters
BM120M
10 meters
BM200M
16 meters
BM60M - BM60M WS
2 meters
BM120M - BM200M
3 meters
BM60M - BM60M WS
1,2 meters
BM120M
3 meters
BM200M
4 meters
Alarm zone
Sensitive zone
Sensitive zone
Chapter 5: Description of working
The two units (transmitter: TX and receiver: RX) must be positioned facing each other at the two
ends of the distance to protect. Be aware that the nature of the ground underneath, or special
weather conditions might affect the real range.
Working
The transmitter emits a modulated microwave signal (10,525 GHz), which is received by the
receiver and whose amplitude is compared with the programmed alarm threshold.
When an intruder crosses the microwave area, it causes a signal-intensity decrease under a
minimum level fixed; the receiver shows the alarm condition, lighting up a red Led indicator and
opening the contat of the alarm relay.
If the signal of the transmitter is not received for over 30 seconds, the alarm relay could go back
to quiet condition and the negative to terminal D (disqualification) fails until signal restoring.
For this reason, in the hard-wired system, it is
suggested to make the connection
described in the chapter
concerning disqualification.
The drawings identify the
natural shadow areas
in the immediate
sorroundings of the
two units, which extend
for about 3 meters, in a
typical installation at 1 - 1,2 m
height.
Note: the diagrams of the patterns shown in the drawings are an indication and a guide
during installation. They do not represent the real radiation diagram of the antennas as
they may be subject to variations due to environmental context.
sensitive
zone
sensitive
zone
alarme
zone
