ELSEMA MD2010 Loop Detector User Manual
- June 3, 2024
- ELSEMA
Table of Contents
MD2010 Loop Detector
User Manual
Loop Detector is used to detect metal objects such as motor vehicles, motor bikes or trucks.
Features
- Wide supply range: 12.0 to 24 Volts DC 16.0 to 24 Volts AC
- Compact size: 110 x 55 x 35mm
- Selectable sensitivity
- Pulse or Presence setting for relay output.
- Power up and loop activation LED indicator
Application
Controls automatic doors or gates when a vehicle is present.
Description
Loop detectors in recent years have become a popular tool having innumerable
applications in policing, right from surveillance operations to traffic
control. Automation of gates and doors has become a popular usage of the loop
detector.
The digital technology of the loop detector enables the equipment to sense a
change in the inductance of the loop as soon as it detects the metal object in
its path. The inductive loop which detects the object is made of insulated
electrical wire and is arranged either as a square or rectangle shape. The
loop consists of several loops of wire and consideration should be giving to
the loop sensitivity when installing on different surfaces. Setting the
correct sensitivity allows the loops to operate with maximum detection. When
detection occurs, the detector energises a relay for the output. This
energising of the relay can be configured, to three different modes, by
selecting the output switch on the detector.
Sensing Loop Position
A safety loop should be positioned where the largest amount of metal of the
vehicle will be present when that vehicle is in the path of the moving gate,
door or boom polee aware that metal gates, doors or poles could activate the
loop detector if they pass within range of the sensing loop.
- A free exit loop should be positioned +/- one and a half car lengths away from the gate, door or boom pole, on the approach side for traffic exiting.
- In cases where more than one loop is installed ensure there is at least a distance of 2m between the sensing loops to prevent cross-talk interference between the loops. (Also see Dip-switch 1 option and number of turns around the loop)
LOOP
Elsema stocks pre-made loops for easy installation. Our pre-made loops are
suitable for all types of installations.
Either for cut-in, concrete pour or direct hot asphalt overlay. see
www.elsema.com/auto/loopdetector.htm
Detector position and installation
- Install the detector in a weatherproof housing.
- The detector should be as close to the sensing loop as possible.
- The detector should always be installed away from strong magnetic fields.
- Avoid running high voltage wires near the loop detectors.
- Do not install the detector on vibrating objects.
- When the control box is installed within 10 metres of the loop, normal wires can be used to connect the control box to the loop. More than 10 metres requires the use of a 2 core shielded cable. Do not exceed 30 metres distance between control box and loop.
Dip-switch Settings
| Feature | Dip Switch settings | Description |
|---|
Frequency setting (Dip switch 1)
High Frequency| Dip switch 1 “ON” | This setting is used in cases where two or
more loop
detectors and sensing loops have been installed. (The
sensing loops and detectors should be positioned at least
2m apart). Set one detector to high frequency and the
other set to low frequency to minimize the effects of
cross-talk between the two systems.
Low Frequency| Dip switch 1 “OFF”
Low sensitivity 1% of loop frequency| Dip switch 2 & 3“OFF”
| This setting determines the necessary change to the
loop frequency to trigger the detector, as metal passes
across the sensing loop area.
Low to medium sensitivity 0.5% of loop frequency| Dip switch 2 “ON” & 3“OFF”
Medium to high sensitivity 0.1% of loop frequency| Dip switch 2 “OFF” &3 “ON”
High sensitivity 0.02% of loop frequency| Dip switch 2 & 3 “ON”
Boost Mode (Dip switch 4)
Boost mode is OFF| Dip switch 4 “OFF” | If boost mode is ON the detector will
immediately switch to high sensitivity once activated.
As soon as the vehicle is no longer being detected the sensitivity reverts
back to what has been set on dipswitch 2 and 3. This mode is used when the
height of the ndercarriage of a vehicle increases as it passes over the
sensing loop.
Boost mode is On (Active)| Dip switch 4 “ON
Permanent presence or limited presence mode (When presence mode selected. See
dip-switch 8) (Dip switch 5)
This setting determines how long the relay remains active when a vehicle is
stopped within the sensing loop area.
Limited presence mode| Dip switch 5 “OFF” | With limited presence mode, the
detector will only
activate the relay for 30 min.
If the vehicle has not moved out of the loop area after
25 min, the buzzer will sound to alert the user that the
relay will deactivate after another 5 min. Moving the
vehicle across the sensing loop area again, will reactivate the detector for
30 min.
Permanent presence mode| Dip switch 5 “ON” | The relay will remain active for
as long as a vehicle is
detected within the sensing loop area. When the vehicle
clears the sensing loop area, the relay will deactivate.
Relay Response (Dip switch 6)
Relay response 1| Dip switch 6 “OFF” | Relay activates immediately when the
vehicle is
detected in the sensing loop area.
Relay response 2| Dip switch 6 “ON” | Relay activates immediately after the
vehicle leaves the
sensing loop area.
Filter (Dip switch 7)
Filter “ON”| Dip switch 7 “ON | This setting provides a 2 sec delay between
detection
and relay activation. This option is used to prevent false activations when
small or fast moving objects pass through the loop area. This option can be
used where an electric fence nearby is the cause of false activations.
If the object does not remain in the area for 2 sec the
detector will not activate the relay.
Pulse mode or Presence mode (Dip switch 8)
Pulse mode| Dip switch 8 “OFF” | Pulse mode. Relay will activate for 1 sec
only on entry
or exit of sensing loop area as set by dip-switch 6. To
re-activate the vehicle must leave the sensing area and
re-enter.
Presence mode| | Presence mode. Relay will remain active, as per dipswitch 5
selection, for as long as a vehicle is within the loop sensing area.
Reset (Dip switch 9)The MD2010 must be reset every time a setting change is
made to the Dip-switches
Reset| | To reset, switch dip-switch 9 on for approximately 2
seconds and then off again. The detector then
completes the loop test routine.
*Please note: The MD2010 must be reset every time a setting change is
made to the Dip-switches
Relay status:
Relay| Vehicle Present| No vehiclepresent| Loop faulty|
No Power
---|---|---|---|---
Presence mode| N/O| Closed| Open| Closed| Closed
N/C| Open| Closed| Open| Open
Pulse mode| N/O| Closes for 1 sec| Open| Open| Open
N/C| Opens for 1 sec| Closed| Closed| Closed
Power up or Reset (Loop testing) On power up the detector will automatically
test the sensing loop.
Ensure the sensing loop area has been cleared of all loose pieces of metal,
tools and vehicles before powering up or resetting the detector!
Loup matus| Loop is open or loop frequency too low| Loop is short
circuited or loop frequency too high| Good loop
---|---|---|---
Fault I, L 0| 3 flashes after every 3sec
Continues Until loop is
corrected| 6 flashes after every 3sec
Continues Until loop is
corrected| All three the Detect LED, Fault
LED and the buzzer will
beep/flash (count) between 2 and
II times to indicate the loop
frequency.
t count = 10KHz
3 counts x I OKHz = 30 — 40KHz
Buzzer| 3 beeps after every 3sec
Repeats 5 times and stops| 6 beeps after every 3sec
Repeats 5 times and stops
Detect LED| –| –
Solution| 1. Check if loop is open.
2.Increase the loop frequency by adding more turns of wire| 1.Check for short
circuit in the loop circuit
2.Reduce the number wire turns around the loop to reduce the loop frequency|
Power up or Reset Buzzer and LED indications)
Buzzer and LED indication:
Detect LED
1 sec flashes 1 sec apart| No vehicle (metal) detected in loop area
On permanently| Vehicle (metal) detected in loop area
Fault LED
3 flashes 3 sec apart| Loop wire is open circuit. Use Dip-switch 9 after any
change has been done.
6 flashes 3 sec apart| Loop wire is short circuited. Use Dip-switch 9 after
any change has been done.
Buzzer
Beeps when vehicle is
present| Buzzer beeps to confirm the first ten detections
Continuous beep with no
vehicle in the loop area| Loose wiring in loop or power terminals Use Dip-
switch 9 after any change has
been done.
Distributed by:
Elsema Pty Ltd
31 Tarlington Place, Smithfield
NSW 2164
Ph: 02 9609 4668
Website: www.elsema.com
References
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