Telcoma Automations AF124 Instrucciones página 41

GB
FOTO-TEST
For the photo test to work, the system must have two power supply lines for the photocells, the first being
connected to terminals 10 and 11, which power the receivers, and the second to terminals 12 and 13, which
power the transmitters (the photo test must be enabled with dip-switch No. 7 in the ON position).
The control unit checks the efficiency of the photocells by simulating an activation at every start of gate
movement.
In practice, it cuts off the power supply for an instant to the transmitters and checks that the receiver
changes status.
If everything is OK the motor starts up, thereby starting the gate movement; if the receiver has any problems
the cycle stops and the open gate light blinks several times to warn of the situation.
The foto-test function is not only a safety feature but also offers the following advantages:
- energy saving (when the gate is closed the photocell transmitters are off)
- increased autonomy in the event of battery power supply
- less wear of photocell transmitter parts.
- The foto-test also works with photocell 2 (wild input).
- In systems with the foto-test, when the gate is closed the photocell transmitters are not powered and
the input FT1 is open (LED off).
Photocells with connections for the foto-test only operate during gate movement. To test their
operation:
- enter programming (follow points 2 through to 5)
- check the photocells
- exit from programming with a reset.
ADJUSTMENT OF SENSITIVITY
EN 12445 requires that every automation system must pass impact tests measured with a special instrument.
Carry out the impact tests and change the encoder sensitivity through the trimmer (part 12 fig. 1).
If adjustments are insufficient to make values fall within the graph indicated by the above standard, we
recommend installing a soft rubber profile on the leading edge of the gate in order to soften impact.
If the requirements of the standard can still not be met after having adjusted the sensitivity and mounted the
rubber profile, alternative devices must be mounted, such as a safety edge on the leading edge of the gate.
SPEED CONTROL (Fig. 1, part. 13)
Speed adjustment must be made taking into account the weight of the gate: speed should be adjusted
according to the following chart:
300
200
100
Speed motor (m/min.)
10 12 14 16
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