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EMX ULT-II Vehicle Loop Detector with 7 Pin Screw Terminal Instruction

EMX-ULT-II-Vehicle-Loop-Detector-with-7-Pin-Screw-Terminal-Instruction-prodact-img

Instruction Manual

The ULT-II vehicle loop detector senses metallic objects near an induction loop. This vehicle detector may be used in center, reverse and exit loop positions. The ULTRAMETER™ display allows for easy set-up by displaying the optimum sensitivity for detecting a vehicle near the loop while ignoring interference. Ten sensitivity settings allow for fine adjustment of the detection level. Four frequency settings provide flexibility in preventing crosstalk in multi-loop applications.

Cautions and Warnings

This product is an accessory or part of a system. Install the ULT-II according to instructions from the gate or door operator manufacturer. Comply with all applicable codes and safety regulations.

Specifications

  • Power  12-24 VDC/AC
  • Draw Current  18 mA
  • Loop Frequency  4 settings (low, med-low, med-hi, high)
  • Loop Inductance Rangev  20-2000 μH (Q factor ≥ 5)
  • Surge Protection  Loop circuitry protected by surge suppressors
  • Operating Temperature  -40º to 180ºF (-40º to 82ºC) 0 to 95% relative humidity
  • Connector  7 pin male with screw terminal
  • Dimensions (L x W x H)  3.0” (76 mm) x 0.9” (22 mm) x 2.75” (70 mm)

Ordering Information

  • ULT-II Vehicle loop detector (included)
  • LD-7P 7 position screw terminal (included)
  • PR-XX Lite preformed loop (XX – specify size)
  • TSTL Test loop, troubleshooting tool

Wiring ConnectionsEMX-ULT-II-Vehicle-Loop-Detector-with-7-Pin-Screw-Terminal-Instruction-fig-1

7 Pin Male Connector with Screw Terminal

Connector Pin Description
1 Loop Connection
2 Loop Connection
3 Power + (12-24 VDC/AC)
4 Power – (12-24 VDC/AC)
5 Relay – NO (normally open contact)
6 Relay – COM (common contact)
7 Relay – NC (normally closed contact)

Settings & DisplayEMX-ULT-II-Vehicle-Loop-Detector-with-7-Pin-Screw-Terminal-Instruction-fig-2

DIP Switches

The DIP switch settings are explained on the following page.

Sensitivity Setting

The 10-position rotary switch allows for adjustment of the detection level. The sensitivity threshold increases from position 0 (lowest setting) through 9 (highest setting). Typical applications require a setting of 3 or 4. The rotary adjustment must be set to a specific/whole number.b There are no half settings.

Detect / Frequency Count (Red LED)

Presence Detected on
No Presence off
Frequency Count flashing

ULTRAMETER™ Display

The display shows the sensitivity setting required to detect a vehicle near the loop. To use this feature, observe the display while a vehicle is moving into position near the loop, 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 loop, the display is blank. The effects of cross-traffic interference can be observed on the display when the sensing area is vacant.

Power / Loop Fault Indicator (Green LED)

Normal Operation on
Shorted or Open Loop fast flash
Previous Loop Fault flashes once

intermittently

Upon power up, the detector initializes by automatically tuning to the loop. The green LEDindicates that the detector is powered and   operational.

Frequency Count / Reset Button

Press the frequency count button and count the number of flashes on the red LED. Each flash represents 10 kHz. Following a frequency count cycle, the detector re-initializes.

Fail Safe/ Fail Secure Scenarios

Fail Safe Loop Failure
Fail Secure Power Failure

mode activates the presence output in the event of a loop failure. In a power failure event, the detector’s output will not change its state. This means for power failure scenarios

DIP Switches

Frequency Settings DIP Switch
4 3
Low on on
Medium Low off on
Medium High on off
High off off

DIP switches 3 and 4 are used to assign the loop operation frequency. The primary purpose of the Frequency Setting is to allow the installer the ability to set different operating frequencies for multi-loop installations and is recommended to prevent crosstalk/interference from multiple loops.

Automatic Sensitivity Boost  

DIP Switch 2

ASB Enabled on
ASB Disabled off

The Automatic Sensitivity Boost causes the sensitivity to increase following initial detection. This feature is useful to prevent dropout when detecting high-bed vehicles.The sensitivity returns to its normal setting after the vehicle exits the loop. The decimal point on the ULTRAMETER™ display indicates ASB is on.

 

Output Relay

 

DIP Switch 1

Pulse on Entry on
Presence off

The Pulse/Presence switch allows the Output Relay to be configured for presence or one-second pulse on entry operation. When set to pulse operation, the display cycles through “P…U…L…S…E” repeatedly to indicate that the detector is set for pulse operation. When set to presence, the output  relay remains activated while the vehicle is present on the loop.

Loop Installation

NEW SLAB POUREMX-ULT-II-Vehicle-Loop-Detector-with-7-Pin-Screw-Terminal-Instruction-fig-3

Ty-wrap 1-1/4” PVC pipe to the top of the rebar in the size and configuration of the loop (ex. 4’ x 8’). Then ty-wrap the loop to the top of the PVC frame. This stabilizes the loop during the pour and separates it from the rebar

SAW CUT EXISTING SURFACEEMX-ULT-II-Vehicle-Loop-Detector-with-7-Pin-Screw-Terminal-Instruction-fig-4

Cut 1” deep into the existing surface, place a 45° cut at the corners to prevent sharp edges from damaging the loop wire. Notch out for the “T” connection where the lead wire connects to the loop. Remove all debris from the finished cut with compressed air. Place the loop into the saw cut. Place backer material into the saw cut over the loop wire and pack tightly. Place a high-quality sealer over the saw cut to seal the surface

RESURFACE ASPHALTEMX-ULT-II-Vehicle-Loop-Detector-with-7-Pin-Screw-Terminal-Instruction-fig-5

Saw cut the existing surface ¾” deep and place a 45° cut at the corners to prevent sharp edges from damaging the loop wire. Remove all debris from the finished cut with compressed air. Place sand over the loop wire to the surface and pack tightly. Lay new asphalt.

GRAVEL OR SOIL INSTALLATIONEMX-ULT-II-Vehicle-Loop-Detector-with-7-Pin-Screw-Terminal-Instruction-fig-6

While this is not a recommended installation for most loops, it has been used successfully with proper preparation. Remove gravel or top soil until reaching a stable base. Dig ~ 6-8” deep by ~ 6-8” wide. Fill halfway with sand and pack tightly. Place the loop into the trench and finish filling to level with sand. Pack tightly and replace gravel or soil over top.

GENERAL INSTALLATION GUIDELINES

  • Use EMX lite preformed loops for quick, reliable installations.
  • It is not recommended to install a loop near power lines (overhead or underground) or low voltage lighting. If necessary near these power sources, place at a 45° angle.
  • Make the loop shape a diamond, not a square.
  • Never install a loop near inductive heaters.
  • If using a non-preformed loop, lead-in wire (wire from loop to detector) must be twisted a minimum of 6 turns per foot to avoid the effects of noise or other interference.
  • Detection height is approximately 70% of the shortest side of the loop. For example: detection height for a 4’ x 8’ loop = 48” x .7 = 33.6”

Installation

  • Wire the ULT-II into the operator according to instructions provided by the manufacturer
  • Configure the DIP switches according to preferences. Refer to Settings & Display for more information
  • If using multiple loops or suspect crosstalk/interference from the environment, perform a frequency count on each detector to confirm that the operation frequencies are different.
  • Press the FREQUENCY COUNT / RESET button and count the number of flashes of the red LED. Each flash represents 10kHZ. Counts from 3 to 13 confirm that the detector is tuned to a loop.
  • If multiple loops and detectors are utilizing the same or very similar frequency, configure DIP switches 7 and 8 on one of the devices. For example: Move one ULT-II to the low frequency setting and the second ULT-II to the high frequency setting.
  • Press the FREQUENCY COUNT / RESET button to re-initialize the detector and program the DIP switch settings.
  • Adjust the sensitivity setting to desired level to assure detection of all vehicle traffic.
  • To test the sensitivity, without moving the sensing loop, drive a vehicle near the loop. When the vehicle is first detected by the loop, “9” will be displayed on the ULTRAMETER™ display. Position the vehicle over the loop where the detection point is desired, 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 loop to remove it from the detection zone (ULTRAMETER™ display should be blank).
  • Press the FREQUENCY COUNT / RESET button on the ULT-II.
  • Retest the product by moving the vehicle into and out of the detection zone to make sure the set-up and location are working as intended.

Troubleshooting

Symptom Possible Cause Solution
Green LED not on No power Check the power supplied to the ULT-II on pins 3 and 4. Voltage should read between 12-24 VDC/AC.
Green LED fast flash Loop wire shorted or open 1.     Check the loop resistance with a multimeter to confirm a reading between 0.5 ohms and 5 ohms. If the reading is outside of this range, replace the loop. The reading should be steady.

2.     Check loop connections to terminals.

3.     Press the FREQUENCY COUNT / RESET button.

Green LED flashes once intermittently Loop wire was previously shorted or open 1.    Check the loop resistance with a multimeter to confirm a reading between 0.5 ohms and 5 ohms. If reading is outside of this range, replace the loop. The reading should be steady.

2.    Check loop connections to terminals.

3.    Press the FREQUENCY COUNT / RESET button.

Red LED

on constantly (stuck in detection mode)

Faulty loop

 

Poorly crimped connection or loose connection

Perform a megger test from loop lead to ground, it should be more than 100 megaohms.

Check loop connections to terminals. Verify splices are properly soldered and sealed against moisture.

Observe ULTRAMETER™ display. The level indicated on the display indicates residual frequency shift from vacant loop to vehicle presence. Press FREQUENCY COUNT / RESET button to re-initialize the detector.

Detector detects intermittently when no vehicle is on the loop Faulty loop

 

Poorly crimped connection or loose connection

Perform a megger test from loop lead to ground, it should be more than 100 megaohms.

Check loop connections to terminals. Verify splices are properly soldered and sealed against moisture.

  Cross-talk between multiple loop detectors Set multiple loops to different frequencies.
  Loop not securely installed to prevent movement of loop in pavement. Verify that loop is securely installed in pavement and that site is in good condition preventing movement of loop wires.
No detection Loop wire shorted or open

Loop sensitivity set too low

1.    Check loop resistance with a multimeter to confirm a reading between 0.5 ohms and 5 ohms. If the reading is outside of this range, replace the loop. The reading should be steady.

2.    With vehicle on loop, observe ULTRAMETER™ display. Set sensitivity level to the level indicated on the display.

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.

Documents / Resources

EMX ULT-II Vehicle Loop Detector with 7 Pin Screw Terminal [pdf] Instruction Manual
ULT-II Vehicle Loop Detector with 7 Pin Screw Terminal, ULT-II, Vehicle Loop Detector with 7 Pin Screw Terminal, ULT-II Vehicle Loop Detector, Vehicle Loop Detector, Detector

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