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Selecting the number of activated beams
• The system sequentially activates the transmitter stages, and checks to see if the
corresponding receiver stages have received the infrared signal.
• The control logic counts the number of stages receiving the signal. The resulting
number must be greater than or equal to the number set on the first six switches
of the dip-switch block "A" (fig.6g) located on the receiver base, if this is not
the case the control logic will return an alarm condition
• Calculate the desired number of activated beams and set the switches from 1 to 6
on the dip-switch (remembering that "0" = OFF and "1" = ON) as follows:
Number of activated beams desired
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Functional examples
1) In an installation which only requires base units (8 beams) and which has
obstacles constantly covering 3 infrared beams, 5 out of 8 beams will therefore
have to be activated.
Set the Dip-switch to the binary value 5 (101000).
2) In an installation without fixed obstacles which requires the use of two
expansion units (24 activated beams) and where you want the system to go
into alarm only when it detects an obstacle of a certain size, (e.g. one which
can block at least three beams contemporaneously) 22 out of 24 infrared
beams will have to be active.
Set the Dip-switch to the binary value 22 (011010).
Setting the blackout time
• The blackout time (meaning the time during which the beams will have to be
blacked out for the system to return an alarm condition) can be set to four
different values: 10-30-50-70 ms. The selection is activated by using block "B" of
the Dip-switch (fig. 6g) located on the receiver base unit.
• Work out the desired blackout time and set the switches (7-8) of the
Dip-switch as follows:
Desired blackout time
10 ms
30 ms
50 ms
70 ms
N.B. In cases where the mains power supply is heavily disturbed you are advised
to select a high blackout time in order to make the device less sensitive to
signal interference.
Setting the drop out delay
• The relay drop out delay time is programmable. The available values are 100
and 200 ms and 3 s; The selection is activated by using the Dip-switch on the
amplification module of the receiver base unit (block "C"), (fig. 6n)
Desired dropout delay time
100 ms
200 ms
3 s
• At this point the system is ready for operation.
Checks: carry out several trial movements interrupting and freeing the signal. When
the beams are free of obstacles the red Led (ALARM), located on the amplification
module of the receiver base unit, should turn off.
Dip
1
2
3
4
5 6
0
0
0
0
0 0
1
0
0
0
0 0
0
1
0
0
0 0
1
1
0
0
0 0
0
0
1
0
0 0
1
0
1
0
0 0
0
1
1
0
0 0
1
1
1
0
0 0
0
0
0
1
0 0
1
0
0
1
0 0
0
1
0
1
0 0
1
1
0
1
0 0
0
0
1
1
0 0
1
0
1
1
0 0
0
1
1
1
0 0
1
1
1
1
0 0
0
0
0
0
1 0
1
0
0
0
1 0
0
1
0
0
1 0
1
1
0
0
1 0
0
0
1
0
1 0
1
0
1
0
1 0
0
1
1
0
1 0
1
1
1
0
1 0
0
0
0
1
1 0
1
0
0
1
1 0
0
1
0
1
1 0
1
1
0
1
1 0
0
0
1
1
1 0
1
0
1
1
1 0
0
1
1
1
1 0
1
1
1
1
1 0
0
0
0
0
0 1
Dip
7 8
0 0
1 0
0 1
1 1
Dip
1 2
1 0
0 1
0 0
6
FINE TUNING THE SYSTEM
The system has two Test Point pins located on the amplification module of the
receiver base unit (fig. 6l), marked according to their polarity (+ and -).
Measurements carried out using an analogical tester will allow you to work out
(indicatively) the optimum alignment of the receiver and transmitter units, for
installations in which the distance between the transmitter and receiver units
exceeds 10 to 12 metres.
Alignment checks
1) Temporarily wire up the transmitter and receiver base units, position them
on the structure in the definite position which they will occupy in the final
installation and align the two units.
2) Enable the test point function by closing the jumpers J1-J3 (fig. 6c-6h) on the
transmitter and receiver base units.
3) Select a number which is less than or equal to the number allowed by
the receiver base (4 for the model B4, 8 for the model B8) (see paragraph
"Selecting activated beams").
4) Connect the terminals of the tester to the two test point pins. The optimum
position (transmitter to receiver) will correspond to the maximum signal
deviation registered on the tester. The following indications are a supplement
to those supplied by the tester:
-
Led "L4" turns off (the system is at rest)
-
Disactivation of the buzzer (enabled by closing the jumper "J2" fig.6f)
5) Once the optimum position has been established remember to open the jumpers
J1-J3 and also "J2" if you wish to disable the buzzer.
Attention!
If one of the jumpers J1 - J3 is left closed the system will be unable to recognise
any expansion units which have been fitted.
Where multiple barriers (side by side) are being used proceed as follows:
- maintain a minimum distance, between each pair, of 0,5 metres.
- make sure the transmitters are on opposite sides (not side by side)
- if you have objects which move consistently (such as gate which is closing) you
may get a reflection from the TX of one barrier to the RX of the other barrier. This
situation could provoke false alarms. Should this occur you will have to leave
a greater distance between the barriers installed side by side and protect them
from reflection by installing a divider.
Antitampering device
When the tampers "T1" and "T2" (fig. 6a and 6b) are open (normally closed
contacts) the connection between the transmitter and receiver is broken causing
a system alarm.
Tamper "T3" (fig.3 only on the receiver base) has a single normally closed contact
which will detect any tampering of the terminal board wires even when the system
is not powered up. The two wires (already soldered) can be connected to a security
device for an eventual secondary alarm system.
FUNCTION ANOMALIES
• The red led "L1" does not light up
- Check that the fuse "F1" (fig. 6a) has not blown.
• The red led "L4" remains continuously lit
- Check that the jumpers E1,E2 and E3 have been correctly inserted.
- Check that the switch "S1" has been correctly set according to the distance
between the transmitter and the receiver.
- Check that both jumpers "J1" & "J3" are open.
- Check the setting of the dip switch: block "A". The number must not exceed
the possibilities of the system. Set the dip switch to zero, if the alarm condition
continues one of the amplification modules could be damaged.
N.B.: The red led flashing could mean one of the following
1) Loss in efficiency of one or more transmitter or receiver stages.
2) The transmitter and receiver alignment is not optimum
• The green led "L5" is flashing
- The synchronism of the serial line signal is disturbed: check the run of the cables
and move them away from power sources or other disturbances.
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