Foresee FA31 photobeam doc. S01
Functional description
FA31 is a single relay infrared photobeam working from 12V
or 24V ac/dc. The slim body ensures the beam can be placed
at the very edge of the opening. The circuit boards inside can
be set for -90° or 0° or +90° angle.
Both Tx and the Rx have a red power LED on all the time.
The Rx also has a red LED that is on when the photobeam is
not interrupted. Both are visible through the case.
Installation
Infrared elements should be 500mm to 600mm from ground
level. Screw the case back plates flat mounting. Connections
are by screw terminals. Cables should be sealed into the
case back plate with electricians putty or grommet supplied.
It is a good precaution to spray a conformal coating on the
PCB before closing. WD40 also is a good insert repellent.
Forematic
9 Vanalloys Estate
Stoke Row
Henley RG9 5QW www.forematic.com QPS01 -FA31
FA31 specification
Power
12/24V ac/dc
Range
12m
Dimensions
37.5 x 36 x 108m m
Rx current
40mA @ 12V
TX current
50mA @ 12V
Wavelength
940nm
Modulation
2.5kHz
Relay
150mA @ 27Vac SPCO
IP rating
IP55
Angle
-90° or 0° or +90°
Beam splay
-10db @ ±5°
Rx
Rly Com Gnd 12/24
ac/dc
Gnd 12/24
ac dc
Tx
Connections
The relay contact is volt free. A jumper on the Rx
board allows the user to choose NO or NC contacts.
Relay response time is suitable for being driven from a
Cat.2 switched power supply. FA30 runs from 12V or
24V without needing to be set. When running from a
dc supply the photobeam is polarity sensitive, where
Gnd terminal is negative.
Photo-
beam
Rx
Rly Co m Gnd +ve
Infrared beam
Wiring a single FA31. Use N/C
for safety applications. Use
N/O contacts for automatic
opening or signalling.
Power supply +
contacts
Photo-
beam
Tx
Gnd +ve
Photo-
beam
Tx
Gnd +ve
Photo-
beam
Tx
Gnd +ve
Photo-
beam
Rx
Rly Co m Gnd +ve
Infrared beam
Infrared beam
Safety circuit application using 2
FA31’s wit h contacts connected
in series. Set jumper to the right.
The Tx parts must not be on the
same side of the road.
Photo-
beam
Rx
Rly Co m Gnd +ve
Power -
supply +
contacts
Orientation
The circuit board in Tx and Rx
can be rotated 90° to face in
either direction. This helps to
mount the beam on extreme
of the opening.
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