10
3.4 Special electric connections : photocells (optional for HC812.03)
The protection system by means of photocells is composed of one or more PAIRS of devices, one of them is the TRANSMITTER and the other is the RECEIVER. Fig.16-17
The first transmits an invisible infrared beam picked up by the receiver; in case the beam were interrupted the equipment will open a relay which shall transmit a signal to the programmer
that shall provide to invert the motors operation direction during the wings closing.
Caution: Carry out connections according to Fig.16. In case photocells were more than ONE pair, carry out connection SERIES. Fig. 16a. Provide for a digging in the ground suitable to lay a
cable duct crossing the gate width.
1. Cable having a minimum cross section of 0.5 mm_ SHALL BE PROTECTED BY A PROPER SHEATH.
2. In case of double safety device, provide for a DOUBLE PASSAGE.
3. Position the receiver in front of the transmitter at the same height (40/60 cm).
4. The red led off indicates a perfect alignment.
5. Install the photocells cables far from cable ducts to avoid interference.
6. Never assemble the receiver in front of the sun.
7. In case of double safety device, alternate a receiver with a transmitter Fig. 16a
Accessories installation, see paragraph 3.1 Connections.
Fig.16
Fig.16/a
Fig.17
Fig.17/a
