20 – English
Photocells
Through addressing using special jumpers, the “BLUEBUS” system enables the control unit to recognise the photocells and assign the correct
detection function. The addressing operation must be done both on TX and RX (setting the jumpers in the same way), while making sure there
are no other pairs of photocells with the same address.
In an automation mechanism for sliding gates with ROBUS, it is possible to install photocells as shown in the gure.
Each time a photocell is added or removed, the control unit must go through the recognition process as described in Paragraph 8.4 “Recogni-
tion of other devices”.
Table 10
Photocells Jumpers
PHOTO
Photocell h = 50
with activation on closing
PHOTO II
Photocell h = 100
with activation on closing
PHOTO 1
Photocell h = 50
with activation on closing
PHOTO 1 II
Photocell h = 100
with activation on closing
PHOTO 2
External photocell activated
when gate opens
PHOTO 2 II
Internal photocell activated
when gate opens
PHOTO 3 Single photocell covering the entire automation
The joint installation of PHOTO 3 and PHOTO II requires that the position of the elements constituting the photocell (TX - RX) complies with
the precaution contained in the photocell instruction manual.
8.2 - FT210B Photosensor
The FT210B photosensor unites in a single device a force limiting device (type C in accordance with the EN12453 standard) and a presence
detector which detects the presence of obstacles on an optical axis between the TX transmitter and the RX receiver (type D in accordance with
the EN12453 standard). The sensitive edge status signals on the FT210B photosensor are transmitted by means of the photocell beam, inte-
grating the two systems in a single device. The transmitting part is positioned on the mobile leaf and is powered by a battery, thereby eliminating
unsightly connection systems; battery consumption is reduced by special circuits to guarantee a duration of up to 15 years (see the estimation
details in the product instructions).
Combining a FT210B device with a sensitive edge (TCB65, for example) allows for attaining the level of security of the “main edge” required by
the EN12453 standard for all “types of use” and “types of activation”.
Photosensor FT210B combined with “resistive” sensitive edges (8.2 kΩ) is safe against single faults. It is equipped with a special anti-collision
circuit to prevent interference with other detectors, even not synchronised, and allows for adding other photocells; for example, in case of transit
of heavy vehicles where a second photocell is normally positioned at 1 m from the ground.
See the FT210B instruction manual for further information concerning connection and addressing methods.
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