EMX INDUSTRIES LRS-C1 Single Cut Magnetoresistive Vehicle Detector Instruction Manual

LRS™

Single Cut Magnetoresistive Vehicle Detector

Instruction Manual

The Loop Replacement System (LRS) features advanced 3-axis, magnetoresistive sensing technology. The small size of the LRS allows for easy installation in pavement with a single saw cut. It provides cost savings on labor and materials when compared to the multiple cuts and corner reliefs required for the installation of inductive loops. The sensor measures the Earth’s magnetic field and responds to disturbances caused by ferrous objects. Three sensing elements provide magnetic field measurement in the X, Y and Z axis, improving detection sensitivity. The LRS flat pack (FP) and direct burial (DB) sensors are also suitable for above ground installations, making them ideal for use in confined areas or hidden in non-ferrous architectural components for security purposes. The LRS’ exciting new technology provides a high-sensitivity, compact and cost-effective solution for reliable vehicle detection.

NOTE: When power is applied to the LRS-C1 controller and the LRS-FP or DB sensor is connected, the settings on the controller will be sent to the sensor. The sensor stores these settings even when disconnected from the LRS-C1. However, the controller is required to program and recalibrate the sensor.

Specifications

| LRS-C1 Controller| LRS-FP and DB Sensor
---|---|---
Detection Range| 5 ft (1.5 m) radius
Response Time| 125 ms
Outputs| SPDT relay| NPN (open collector)
Fail safe in the event of a sensor failure or power loss
Output Current Rating| Relay: 1 A @ 24-120 VDC| 50 mA (max)
Connection| 10 position screw terminal| 5 conductor direct burial
Operating Environment| -40º to 82ºC (-40º to 180ºF); 0 to 95% relative humidity
Housing Material| ABS (plastic)| LRS-FP: Polyamide
LRS-DB: PVC
Environmental Rating| IP30| IP69K
Power| 12-30 VDC and 24 VAC| 12-30 VDC
Current Draw| 40 mA (max)| 10 mA (max)
Supply Protection| Reverse polarity and fuse protected
Dimensions (L x W x H)| 76 mm (3.0”) x 22 mm (0.9”)
x 70 mm (2.75”)| LRS-FP: 108 mm (4.3”) x
22 mm (0.9”) x 9 mm (0.3”)
LRS-DB: 102 mm (4.0”) x 27 mm (1.0”)
Weight| 68 g (0.15 lbs)|

LRS-FP: 27 g (0.06 lbs)
LRS-DB: 43 g (0.09 lbs)

Ordering Information

• LRS-C1  Controller (included, required to program and recalibrate the LRS-FP or DB)
• LRS-FP-50   Flat pack sensor 50′ lead-in wire
• LRS-FP-100 Flat pack sensor 100′ lead-in wire
• LRS-DB-50 Direct burial sensor 50′ lead-in wire
• LRS-DB-100 Direct burial sensor 100′ lead-in wire
• LRS-L  Logic Interface (optional accessory, can be used to increase size of detection zone size with multiple sensors or to set-up AB direction control logic)

Wiring Connections

*The shield (bare) wire on the sensor cable should be connected to earth ground to help prevent electromagnetic interference.

Settings & Display

Infinite presence mode causes the output to remain in detect mode as long as the vehicle remains near the sensor. Normal presence mode causes the output to reset after 5 minutes of detection. Do not use normal presence mode in reversing loop applications.

The Detect-On-Stop™ (DOS®) feature requires that a vehicle must come to a complete stop near the sensor for a minimum of 1-2 seconds before the output activates. Do not use the DOS® feature for reversing loop applications.

The output feature provides the ability to toggle between pulse and presence mode. When Pulse is selected, the output will be activated for approximately 500ms on vehicle entry or exit. When Presence is selected, the output will be activated according to the setting on DIP switch 8.

When DIP switch 6 is on ( Pulse ), it will determine if the output relay pulses when a vehicle is entering or exiting the detection zone.

Turning on the Delay setting provides a 2 second delay before activating the relay after the sensitivity threshold is met.

The LRS has the ability to detect in 3 dimensions (X, Y, Z axis). In most applications, all three Axis Settings should be switched on. For more information on axis settings, see Installation.

1. Sensor Calibration/Reset
Pressing the reset button calibrates the sensor to the local magnetic field. This must be used whenever the sensor is moved from its position or when any DIP switch settings are changed and may be necessary if the sensor’s local magnetic environment has changed (see Troubleshooting).

2. ULTRAMETER™ Sensitivity Display
The display shows the sensitivity setting required to detect a vehicle near the sensor. To use this feature, observe the display while a vehicle is moving into position near the sensor, note the number displayed, then adjust the sensitivity setting to the displayed position. The display will adjust from 9 for a weak signal to 0 for a very strong signal. During normal operation, when a vehicle is not on or near the sensor, the display is blank. The effects of cross-traffic interference can be observed on the display when the sensing area is vacant.

3. Green & Red LED
The green LED indicates the detector is powered and operational. When the red LED is on, a vehicle presence is detected. When it is off, there is no presence detected.

4. Sensitivity Setting
   The 10-position rotary switch allows for adjustment of the detection level. The sensitivity level increases from position 0 (lowest setting) through 9 (highest setting). Typical applications require a setting of 3 or 4. Adjusting the sensitivity level applies to all axes. The rotary adjustment must be set to a specific/whole number. There are no half settings. For more information on sensitivity settings, see Installation.

Installation

Read the following list of tips prior to beginning the installation process.
This will save significant time in the long run.

• Every time the settings are changed on the LRS-C1 or the sensor is moved, press the RESET button on the LRS-C1.
• The LRS-FP and DB sensors are sensitive to minute changes in the magnetic field around them. Power lines, transformers, and other electrical devices located in the vicinity of the sensor that produce transients could cause disturbances in the magnetic field that may result in triggering the detector. Avoid installation of the sensor near these devices.
• Do not mount on any moving surface, such as bridges or walkways that may vibrate under traffic. The sensor must always be installed in such a way that it remains completely motionless. Any movement will cause the sensor to trigger.

Sensor Installation

1. Determine the location for the LRS-FP or DB sensor installation. The sensor must be at least 6 feet away from all moving metal. If rebar is present in the roadway, the sensor must be installed above it.

2. Tape the sensor and lead to the pavement and connect the sensor to the LRS-C1 (see Wiring Connections).

3. Connect the LRS-C1 to the operator according to the operator’s instructions.

4. Configure the DIP switch and sensitivity settings according to preferences (see Settings & Display for more information). Press the RESET button on the LRS-C1 after changing settings.

5. Test the product. Without moving the sensor or the lead going to the sensor, drive a vehicle near the sensor. When the vehicle is five feet from the sensor, “9” will be displayed on the ULTRAMETER™ display. Once the vehicle is the desired distance from the sensor, take note of the number displayed on the ULTRAMETER™ and change the sensitivity setting (10-position rotary switch) to match that number. Move the test vehicle away from the sensor to remove it from the detection zone (the ULTRAMETER™ display should be blank). Press the RESET button on the LRS-C1 and do not move the sensor or lead. Retest the sensor by moving the vehicle into and out of the detection zone to make sure the set-up and location are working as intended.

TIP: The LRS-FP and DB sensors have the ability to detect in 3 dimensions (X, Y, Z axis).
In most applications, all three axes should be switched on (DIP switch 1, 2, and 3).

• Note that the LRS-FP sensor allows for the best implementation of the axis settings. The installer knows the direction of all axes because of the flat pack’s fixed orientation within the saw cut. (See the axis diagram in the photo below.)
• The only known axis for the LRS-DB sensor is the Y axis, which is in the same direction as the lead.
• To find the axis most affected by an unwanted disturbance when using the LRS-DB, perform the following procedure:
  A. Calibrate the sensor with the disturbance removed.
  B. Move the disturbing object into position.
  C. Select each axis individually, observing the ULTRAMETERTM display for each.
  D. Turn off the axis that causes the lowest number to appear due to the disturbance.

6. After the sensor is working correctly, cut the pavement according to the instructions starting below. Use a hard sealant, such as epoxy, around the sensor. The sealant fill should not extend above the roadway. Incorrect fill allows vehicle weight to press on and move the sensor in the concrete, which will cause the sensor to go into detection. Press the RESET button on the LRS-C1 once the sensor is in place.

7. Retest the product to ensure proper detection.

LRS-FP Installation

The flat pack requires a 2″ x 3/8″ x 6″ cut in the pavement for the sensor, with a 5/16″ x 2″ deep saw cut for the cable lead. Backer rod should be place at a minimum of every 10-14″. Hard epoxy pavement sealant should then be used to fill the cable and sensor cavities. Make sure pavement sealant does not extend above roadway surface.

Sensor laying flat                          Sensor standing

Note: The Y axis is always the direction of the cable.

LRS-DB Installation

For vertical installation, drill a 7″ x 1.5″ hole in the surface with a 5/16″ x 2″ deep saw cut exiting the cutout for the communications /power cable. Backer rod should be placed at a minimum of every 10-14″. Hard epoxy pavement sealant should then be used to fill the cable and sensor cavities. Make sure pavement sealant does not extend above roadway surface.

Note: The Y axis is always the direction of the cable.

When mounting above-grade, make sure that the sensor is placed at a height to maximize the sensitivity of the detector. This typically means installing it at door level to prevent dropouts. The maximum distance maintained between the sensor and the vehicle should be less than five feet.

The sensor should be secured to minimize any movement that might provide false detections or dropouts. Consideration should be made to ensure the sensor is not mounted next to moving metal (for example, barrier arm counterweight). Securing the sensor may be accomplished with at least one 1″ ID (internal diameter) plastic pipe/conduit strap. If plastic straps are not available, aluminum may be used, but should be placed towards the cable-end of the LRS-DB to avoid sensitivity related issues. The LRS-FP can be secured with cable ties and suitable mounts.

The sensor can be installed inside of any non-ferrous architectural structures, such as fiberglass, plastic, aluminum, etc.

Cabling should be enclosed in conduit to minimize environmental degradation.

Troubleshooting

Aluminum vehicle (non-ferrous)

| With a vehicle within the desired proximity, observe the ULTRAMETERTM display to find the minimum sensitivity required for detection.

The LRS is detecting changes in Earth’s magnetic field caused by ferrous metal. Aluminum is non-ferrous and will not be detected. Aluminum vehicles will need to be much closer to the sensor for steel components on vehicle to be detected.

Red LED on constantly (stuck in detection mode) or ULTRAMETERTM display shows a value when no car is present| Local environmental change (example: high voltage lines, power plants, newly introduced steel in detection field of LRS sensor), movement of sensor

Surface sealant is above pavement

Electromagnetic noise or dirty power

| Recheck wiring. Make sure earth ground is secure and connected to the shield wire on the LRS-FP or DB. Recalibrate the sensor using RESET button and see if problem reoccurs. If the issue is still present, the sensor may need to be moved or adjust an axis setting (DIP switch 1, 2, or 3) and push RESET button to undetect new environmental change.

If surface sealant projects above the surface of the pavement when a vehicle drives over the sealant, it will push down on the sensor and cause it to move. If the sensor moves, it will be in permanent detection. Remove the sealant and replace it with a hard epoxy sealant that does not project above the surface of the pavement. Recalibrate sensor using RESET button.

Enabling the detection delay by turning on DIP switch 4 might help alleviate the problem. The system will now have a 2 second delay before activating after the sensitivity threshold is met.

No green LED, red LED or ULTRAMETERTM display on| No power from operator or short circuit in sensor|

1. Using a multimeter, check the voltage across VIN1 and VIN2.
2. Unhook the LRS-FP or DB and see if power returns to the LRS-C1 controller, as indicated by the green LED on.
3. If power returns, replace the LRS-FP or DB sensor.

Green LED flashes half second on, half second off, “E” “1” flashes on display| Communication failure|

1. Check the communications and power wiring to the sensor.
2. Cycle power to the control unit and sensor.

Green and red LEDs flash simultaneously, “E” “2” flashes on display| Insufficient supply voltage|

1. Make sure the power supply is working correctly and properly rated (see Wiring Connections). If supply voltage is confirmed to be correct with multimeter and being supplied by operator, consider using a separate power supply, such as 120 VAC to 12 VDC power converter (minimum 100 mA).
2. Disconnect the sensor and see if power returns to the controller, as indicated by the green LED on.

Green LED flashes half second on, half second off, “E” “3” flashes on display| Damaged sensor module|

1. Cycle power to the LRS-C1 controller and check if error code “E” “3” reoccurs.
2. If error reoccurs, replace the LRS-FP or DB sensor.

Green LED slow flash| Previous communication failure|

1. Check the connection between the controller and sensor.
2. With no vehicle over the sensor, press the RESET button to clear the error and recalibrate.

Warranty

EMX Industries, Inc. products have a warranty against defects in materials and workmanship for a period of two years from date of sale to our customer.

EMX Industries, Inc.                      Tech support: 216-518-9889
Document No.10310204 Rev 1.1    technical@emxinc.com

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