vds QDM 220 Mode D'emploi page 7

ENG
GENERAL SELECTOR
OPTION 1- Selects a permanent or unlimited detection
ON After 25 minutes of a detected vehicle, the sensor
disables the presence output
OFF Detection is permanent or unlimited during the vehicle
detection
OPTION 2/3- Select the deactivation delay of the presence exit
OFF - OFF - No delay
OFF - ON - 2 sec delay
ON - OFF - 5 sec delay
ON - ON - 10 sec delay
OPTION 4/5/6 - Select the magnetic detector sensibility,
Range: 1 Min. 8 Max
OFF - OFF - OFF - Level 1 (MIN)
OFF - OFF - ON - Level 2
OFF - ON - OFF - Level 3
OFF - ON - ON - Level 4
ON - OFF - OFF - Level 5
ON - OFF - ON - Level 6
ON - ON - OFF - Level 7
ON - ON - ON - Level 8 (MAX)
TECHNICAL SPECIFICATIONS
Power 12V connector to controller
ON/OFF output current 17mA /15mA
Output Open collector until 100mA
Option selection Permanent detection
Deactivation delay
Sensibility
Frequency oscillation
l Function to activate
Frequency oscillation 40KHz a 140KHz
Sensibility 8 level selection
Loop 60 a 120uHm
Working temperature -20 a +85ºC
Dimensions 85 x 41mm
Instruction Manual
( DMT )
LOOP INSTALLATION
A proper loop and detector configuration will ensure an adequate detection system.
To make a loop, use insulated wire with a section of 1 to 1.5 mm2 . The number of loops depends on the chosen rectangular, see next table.
Bury the loop so that their geometry is not altered by the passage of vehicles. The depth of the groove where we put the loop must be
between 3 and 5 cm. The loop must be installed with longer sides at angles rights in the direction of traffic.
From the loop until the sensor the cable must be twisted to prevent its influence in the detection (minimum 20 rounds per metre). Connect
the twisted cable to the connection terminal for this purpose; the length of this section should not exceed 10m, because the sensitivity of the
detector decreases with it.
Max. 10
Twisted pair wire
SERIAL CONNECTION OF TWO LOOPS
Max. 10
Twisted pair cable
TRAFIC DIRECTION
A x B (meters)
Nº of loops
1x 0,5 5
1,5 x 0,75 4
2 x 1 4
2,5 x 1,25 4
3 x 1,5 3
3,5 x 1,75 3
4 x 2 3
4,5 x 2,25 3
5 x 2,5 2
A x B (meters)
Nº of loops
1x 0,75 From 2 to 4
2 x 1 From 2 to 4
2,5 x 1,25 From 2 to 4
4 x 2 From 2 to 4
5 x 2,5 From 1 to 3