tau P-300SA1 Notice D'installation page 8

Temperature range
GB
Size (SA1 card)
Power supply requirements
Loop setup time
Cable feed length
· SECURITY MODE: WHERE LOOP DETECTOR IS CONTROLLED BY THE INTERCOM.
· OPEN CIRCUIT AND SHORT CIRCUIT DETECTION WITH LED AND BEEPER FAULT
INDICATION.
· SENSITIVITY BOOST MODE FOR HIGH BED TRUCKS AND TRAILERS.
· AUDIBLE BEEPER FOR SETTING UP LOOP DETECTOR.
· LOOP FREQUENCY SELECTION
· PULSE OR PRESENCE OUTPUT
1. OPERATIONAL REQUIREMENTS
Crosstalk
Two loop sensors installed next to each other can cause interference crosstalk and false
detects.
This can be eliminated or reduced by selecting different frequencies (dipswitch 1 OFF=HIGH,
ON=LOW) and not having a spacing of less than 1 meter between loops.
Reinforcing
Reinforced steel below the loop sensor (steel mesh beneath the road surface) can reduce
Sensitivity.
In this case, one or two additional turns of wire should be added to the loop.
2. INSTALLATION
Loop wire
It is recommended to use silicon insulated wire with diameter 1.5 mm and should have no
joints along its length.
The sensing loop should have 3 turns of wire.
The sensing loop feeder should be twisted at least 30 twists per meter and run separately from
other wires and be short as possible.
Loop installation
Slots cut into the road should be 3 - 4 cm deep.
The sensing loop should be rectangular in shape with the longest side covering the road
width.
A 45° crosscut should be made at the corners of the rectange, reducing the chance of damaging
the cable.
After the wire has been seated into the bottom of the slots, the slots and wire must be sealed in
tight so they cannot move with silicon or bitumen seal.
WARNING: to avoid reducing the sensitivity of the magnetic field generated, do not pass
the wire inside the pipes or sheaths.
3. LOOP DETECTOR SETUP
Select functions on 9 way dipswitch as required.
Apply power: after 5 seconds the unit will beep once and red status led DL1 will flash.
The unit will beep for the first 10 detections.
8
TECHNICAL SPECIFICATIONS
0° - 60°
100 x 50 x 25 mm
12 - 24V DC 40mA16 – 24 Vac 50mA
5 seconds
50m Max. Normal operation - 100m With reduced
sensi-tivity
P-300SA1
FEATURES
INSTALLATION GUIDE