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LD250/450/850

VEHICLE LOOP DETECTORS

The LD250 / 450 / 850 are Nema Card multi-channel inductive loop detectors. The detectors are pinout compatible with most Nema Card detectors on the market and are easy to set-up and install. Optional features include a RS485 communications port.

Typical applications in the traffic environment are traffic control (traffic lights), toll systems and vehicle counting.

Standard features of the detector are :

Reset Switch.

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.

Presence / Passage feature.

Each channel can be individually setup to operate in presence or passage mode.

Selectable Presence Time.

Each channel can be individually setup for a presence time of 10 minutes or 1 hour.

Switch selectable Sensitivity.

Seven settings are available on the switches to allow flexibility in configuration and application.

1 High 0.02% 5   0.5%
2   0.05% 6   1%
3   0.1% 7 Low 2%
4   0.2% 8 Disable Off
Switch selectable Frequency.

Two frequency settings are available to prevent cross-talk between adjacent loops on different detectors.

TECHNICAL DATA

  1. POWER REQUIREMENT: 19.6V - 28.8VDC.
  2. PRESENCE RELAY OUTPUT: This output has a normally closed relay contact.
  3. INDICATORS: LED indicators show: Detect state.
  4. DETECTOR TUNING RANGE: 15 - 1500 uH.
  5. FREQUENCY: Two step adjustable.
  6. PROTECTION: Loop isolation transformer, zener diode and MOV protection on loop input.
  7. CONNECTOR: 2 x 22 Terminal.
  8. DIMENSIONS: 175mm X 114 X 25mm
  9. OPERATING TEMPERATURE: -40°C to +80°C
  10. STORAGE TEMPERATURE: -40°C to +85°C
  11. HUMIDITY: up to 95% non condensing
 

 

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