Technical Specifications; Operating Conditions - tau 300SA1 Notice D'installation

TECHNICAL SPECIFICATIONS

Temperature range
GB
Dimensions (SA1 board)
Power supply
Loop setting time
Feeder cable length
FEATURES
• FILTER MODE: PROTECTS AGAINST FALSE TRIGGERING.
• OPEN LOOP AND SHORT-CIRCUIT DETECTION WITH FAULT WARNING BUZZER AND
LED.
• SENSITIVITY BOOST MODE FOR HIGH-BED TRUCKS AND TRAILERS.
• BEEPER FOR LOOP DETECTOR SETUP.
• LOOP FREQUENCY SELECTION
• PULSE OR PRESENCE OUTPUT

OPERATING CONDITIONS

- Crosstalk -
• Two loop detectors installed near each other can cause interference and false detections.
This problem can be eliminated or reduced by selecting different frequencies (DIP switch 1
ON=HIGH, OFF=LOW) and making sure you keep the loops at least 2 metres apart.
- Reinforcement -
• Reinforced steel under the loop detector (metal mesh under the road surface) can reduce
the detector's sensitivity. In this case, you should add one or two additional turns of wire to
the loop.
INSTALLATION
- Loop wire -
• You are advised to use silicone-insulated wire measuring at least 1.5 mm in diameter with no
joints anywhere along its length.
• The sensing loop should have 3 turns of wire.
• The feeder should have at least 20-30 twists per metre, must be run separately from other
cables and must be as short as possible.
• If you are using the device to control exiting traffic, the loop should be positioned at least a
one and a half vehicle length from the barrier, gate or boom.
- Installing the loop -
• The slots cut into the road should be 3-5 cm deep.
• The sensing loop should be square or rectangular in shape, with the longest side covering
the width of the road and with the parallel sides of the loop set at least 1 m apart.
• Make a 45° crosscut across the corners of the rectangle to reduce the chance of the wire
being damaged.
• Run the wire in the slots made for the sensing loop (see section on "N° of turns of wire in the
sensing loop") from the detection device and back, bearing in mind that the wire must have
at least 20-30 twists per metre for the exit loop. Twisting results in a reduction in the length
of the wire, hence you should leave a long enough tail of wire to start off with. The slot must
be wide enough to accommodate the suitably twisted wire.
• Once you have placed the wire in the bottom of the slots, use silicone or bitumen to securely
seal the wire in the slots so there is no chance of it moving.
WARNING: do not run the wire inside pipes or sheathes as this could reduce the
sensitivity of the magnetic field generated.
8
0 °C - 60 °C
100 x 50 x 25 mm
12 - 24V DC 40mA 16 - 24V AC 50mA
5 seconds
max. 50m with normal operation/100 m with reduced
sensitivity
P-300SA1