Description

VEHICLE LOOP DETECTOR

The QK-LDT220 is a single channel inductive loop detector.

The use of microprocessor and surface mount technology enables a large number of functions to be incorporated into a small package.

The QK-LDT220 is compatible with most single channel detectors on the market and is easy to set-up and install. Typical applications in the parking and access control environments are safety loops, arming loops and entry or exit loops.

Features

Reset Switch

Pressing the reset switch enables the detector to be manually reset during commissioning and testing.

This results in the detector re-tuning the sensing loop and becoming ready for vehicle detection.

Switch selectable Sensitivity

The detect sensitivity is the minimum change in inductance required to produce a detect output. (%ΔL/L) Eight sensitivity settings are available on the switches to allow flexibility in configuration.

Switch selectable Frequency

The frequency of the loop is determined by the inductance of the loop and the frequency switch setting. If the frequency switch is on, the frequency is reduced. It may be necessary to change the frequency to prevent cross-talk between adjacent loops.

Sensitivity Boost

This feature sets the undetected level to maximum sensitivity and is used to prevent loss of detection of high-bed vehicles.

Filter Option

This option is used to provide a delay of 2 Seconds between detection of the vehicle and switching of the output relay. This delay is normally used to prevent false detection of small or fast moving objects.

Permanent Presence Option

This feature ensures detection of the vehicle will be maintained when the vehicle is parked over the loop for extended periods.

Selectable Extend Time

When switched on this feature extends the outputs for 2 Seconds.

Pulse Relay Selection

The Pulse relay may be configured to energise on detection of a vehicle or when the vehicle leaves the loop.

Selectable Pulse Time

This feature sets the length of time that the pulse relay will be energised for. 1 Second or 0.2 Second.

Power Indicator

This LED Indicator illuminates when power is present.

Detect Indicator

This LED Indicator is illuminated when there is a vehicle over the loop or the loop is faulty. This LED can also be used to determine the loop frequency. On reset, count the number of times the LED flashes. Multiply this number by 10KHz.For example: if the LED flashes 6 times, then the loop frequency is between 60KHz and 70KHz.

Loop Fault Indicator

This LED Indicator is illuminated when the loop is either open circuit or short circuit and is used to give a visual indication of a faulty loop.

Specifications

Downloads

Product Brochure
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