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1) Release the screw on the bottom side of
GB
the housing and remove the housing
cover with an upward movement.
2) Release the screw supporting the rear
mounting plate. Slide the mounting plate
downward and remove it.
3) Use the supplied screws to fasten the
mounting plate to the wall or, for pole
mounting, use the supplied pole mounts
to fasten the mounting plate to a pole
(fig. 3 mounting of two units on a pole
with two light barrier systems mounted
one behind the other, fig. 4 mounting of
a single unit).
4) Lead the connecting cable laid before
(a screened cable is strongly recom-
mended) from the rear side to the screw
terminals. Put the transmitter or receiver
on the mounting plate and fasten it with
screws.
4.2 Electrical connection
1) Connect the terminals
each of the transmitter and the receiver
to a DC power supply of 10 – 24 V via the
connecting cable.
2) Connect the terminals N.C. ALARM (2)
of the receiver to the input of the alarm
control panel, the control device, or the
counting device via the connecting
cable.
3) Connect the anti-tampering contacts
N.C. TAMPER (7) of the transmitter and
the receiver in series to the alarm control
panel. The anti-tampering contact opens
as soon as the housing cover is re-
moved and triggers an alarm via the
alarm system.
When using the light barrier system
in control devices or counting devices, it
is not necessary to connect the ter-
minals N.C. TAMPER.
4.3 Adjusting the transmitter and the
receiver
First adjust the transmitter and the receiver
by means of the optical viewfinder:
1) Look through one of the two viewfinders
(11) of the transmitter.
2) Carefully rotate the support of the trans-
mitter unit (4) around its horizontal axis
until the receiver is in view. The hinge
point of the support is position 10 in fig. 2.
8
If the receiver is not in view, ask a
second person to hold a white sheet of
paper next to the receiver. Keep your
eye at a distance of approx. 5 cm from
the viewfinder.
3) Use the setscrew (5) for vertical adjust-
ment of the transmitter until the receiver
is visible in the centre of the viewfinder.
4) Adjust the receiver in the same way.
5) For fine adjustment, connect a DC volt-
meter to the measuring points
(8) of the receiver (plug contacts for
measuring tips). Select a measuring
range of up to 4 V .
6) Switch on the operating voltage for the
receiver and the transmitter. The LEDs
(9) light up.
7) Adjust the vertical and the horizontal
axes in such a way that the meter shows
the maximum voltage value. Values ex-
ceeding 1.5 V are acceptable, values
exceeding 2 V are good. In dull weather,
and
(1)
the value should exceed 2 V.
show green now. If it shows red, the
beam has been interrupted, has not
been correctly adjusted or the distance
between the transmitter and the receiver
is too long.
4.4 Adjusting the alarm response time
and testing the light barrier system
1) Switch on the operating voltage for the
receiver and the transmitter.
2) With the control D-TIME (3) on the re-
ceiver, adjust the alarm response time,
i. e. the period of time for which the IR
beam must be interrupted to trigger an
alarm or a control pulse.
tween 50 and 500 ms. If a short period of
time is adjusted, even persons moving
fast are detected, however, the risk of
false alarms is higher. With a long period
of time, the risk of false alarms is reduced
but persons moving fast are not detected.
100 ms
200 ms
350 ms
500 ms
The LED (9) on the receiver must
Adjust an alarm response time be-
50 ms
person moving fast
person moving slowly
person walking fast
person walking at a normal pace
person walking slowly
and
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