PHOTOELECTRIC BARRIER MODEL 224AC
IMPORTANT WARNINGS TO READ
BEFORE THE INSTALLATION
Photoelectric barriers are
devices that give an electric signal when an object passes through their sensing
They are made of high quality materials and they are severely tested before being traded. However, should they be used in an application whose failure could cause damages, the following indications have to be taken into account:
PHOTOELECTRIC BARRIER CAN BE USED AS A SENSOR TO DETECT THE PRESENCE OF AN
OBSTACLE IF THE SENSING BEAM GETS INTERRUPTED. IN NO CASE THIS DEVICE CAN
SUBSTITUTE THE OBLIGATORY SAFETY DEVICES THAT MUST BE APPLIED ON ALL DANGEROUS
SHOULD THE BARRIER BE INSTALLED NEAR INVERTERS, SWITCHING SUPPLIERS OR
SIMILAR, DO NOT FORGET THAT THESE DEVICES (IF NOT PROPERLY FILTERED) GIVE INTO
THE POWER SUPPLY NET HIGH INTENSITY ELECTRIC DISTURBANCES THAT CAN INTERFERE
WITH THE PHOTOELECTRIC BARRIER FUNCTIONING.
THEREFORE, IN THESE CASES, IT IS NECESSARY TO PROVIDE UPSTREAM THE
EQUIPMENT WITH AN ADEQUATE NET FILTER.
1) Do not exceed the voltage
limits printed on the product label. For DC photoelectric sensors, use stable
2) Do not connect the
photoelectric sensors power supply cables down‑stream from other devices
and make sure that they are directly connected to the mains.
3) If the power supply source is
a switching voltage regulator, connect the FG (Frame Ground) terminal to the
4) Connect to ground the FG
(Frame Ground) terminal and all metallic parts of every Industrial machinery or
not if a photoelectric sensor is used in it.
5) Do not use the photoelectric
sensors near electromagnetic or high frequency fields.
6) The cables of photoelectric
sensors must be separate from the power supply cables, from the engines cables,
from the inverters cables, or from any other electromagnetic device because
induction noise could cause malfunction or damage to the photoelectric sensors.
Separate the wires of the photoelectric sensor from the above indicated cables
and then insert the wires into an earthed metal conduit.
7) After making all operations
mentioned In the above point 6), if Inductive interference exists, an adequate
transient suppression filter must be used on the power supply line in proximity
to the photoelectric sensors.
8) When a large distance by the
connection wires to the sensor has to be covered, use conductors with a
cross‑section of at least 0.50 mm2
and do not exceed the maximum distance of 100 m,
9) The output signal of a photoelectric sensor cannot be used during the "INITIAL ZERO SETTING" (not more than 300 mS, see detailed description on GENERAL CATALOG).
1) For correct assembly and
alignment, all the accessories supplied with the sensor must be used.
2) To regulate
the sensitivity adjustment trimmer use a suitable screw‑driver without
exerting excessive force.
3) Do not turn too much fixing
screws or nuts to avoid electrical or mechanical damages.
photoelectric sensors side by side, leave an appropriate place between them to
avoid mutual interference,
5) When installing two or more
emitters and the receivers side by side, alternate the emitter with the receiver
or install a light barrier to prevent reciprocal interferences, Avoid reflection
coming from the side or back walls or objects,
6) Do not
expose the photoelectric sensors to direct source of fluorescent light which
could prevent the correct working. Do not exceed the immunity limits to external
7) Do not use organic solvents
or corrosive liquids to clean the lenses of the photoelectric sensors. The
optical parts must be cleaned with a soft cloth and then dried.
8) Do not use the sensors in
open air without adequate protection.
9) Do not use the
photoelectric sensors in dusty places, In presence of steam, gases, corrosive
steams, corrosive liquids, rain or water jets, Do not let condensation form on
the sensor lenses.
10) Do not exceed the Indicated
11) Do not subject the appliance
to strong vibrations or to shocks which con damage the sensor or can harm its
The manufacturer is not liable for the improper use of the product.
Any use and/or application which are not provided for by this Instructions sheet
must be previously and directly authorized by the manufacturer.
PHOTOELECTRIC BARRIER FOR EXTERNAL APPLICATION
- Nylon-fibreglass housing
for electronic components,
- Anti-Interference optical filter to improve the
functioning in case of high luminosity.
- Quick installation
housings for flat surfaces with minimal drilling working.
- Modulated emitter with (Ga-Al-As)
- Green LED on the emitter. If indicates that the receiver
- Yellow LED on the receiver. It indicates that the
receiver is supplied, Once the tuning is performed, it switches off.
- 12V AC-DC or 24V AC-DC
24V DC - 0.5 A 120V AC relay output according to UN18612 norms,
connected to the internal terminal board,
- Maximum switching distance in optimal conditions: 30
- Protection degree: IP54
INSTRUCTIONS FOR MOUNTING AND ALIGNMENT
1) Fix the housing bottom
to the wall using the suitable screws and dowells.
2) Insert the connection cable
'through the sleeve and the housing hole, then connect It to the terminal board
according to the following Instructions.
3) Check that the emitter and
receiver supply voltage corresponds to 12 or 24 Volts, that it Is the voltage
printed on the device.
4) Insert the B projector in the
location prepared on the A housing, then block with C projector fixing (see
5) Supply the emitter with
power: the green LED must be always switched on,
6) Supply the receiver with power: the yellow
LED must be switched on (once the tuning is performed, it switches off)
7) The alignment is achieved by
orientating the optical groups one against the other, by pressing the projector
surface (mounted on the ball joint) until the yellow LED on the receiver
8) Tighten the fixing screws of
the mobile equipments both of the emitter and of the receiver.
9) Check that the device is
functioning using the suitable pierced TEST STRIP,
10) Close the housing offer
inserting the D gasket into the A housing groove; fix the E front protection
through the suitable screws and insert the F optical protection filter.
11) WARNING: during the installation
consider that in case of poor visibility due to fog, rain or other, the
functioning distance can be highly reduced.
12) All the provided accessories
must be installed.
13) The photoelectric barrier must
be periodically tested by
specialized technicians to prevent or to identify any possible failure,
- Check the optical parts and make sure that they are always clean.
- Verify the relay triggering
and check also the electrical contacts.
- Check the
- Check the fixing screws and
that all the equipment does not bear mechanical vibrations,
14) The non-observance of the above norms can cause the device failure.