8
Photocells
The photocells are in pairs, one transmitter and one receiver. They should be mounted 500-600 mm from the
ground and face each other level. Each photocell regardless of type has a 12-volt or 24-volt positive and
negative supply. (Please see Technical Specification for 12v or 24v Control unit)
The receiving photocell does the switching on and off to the control panel. If the transmitting beam can reach the
receiving photocell, there will be a completed circuit to the main panel and the gate/s will function. If the beam is
broken, during operation of closing, the gates will stop and reopen. If the beam is broken before the motors have
started, the gate will not function.
If you are using two pairs of photocells as pictured, the receivers should be crossed on opposite sides so that you
do not have two receivers at the same side.
For this purpose 4 core BT type cable is recommended for use, (CW1128) Follow the wiring diagram provided to
wire both the receiver and transmitting photocells. At the control box end, wire the colour coded cables up as per
the diagram provided showing a typical photocell placement.
When the photocells are working and correctly aligned, you should hear a clicking sound from the transmitter
when the beam is broken intermittently. Once wired, place the covers over the photocells and secure the fixing
screw. Fill any cable gaps with silicone to prevent insects from entering the device and interfering with it.
Surface Mounted Photocells
