Enhanced Dual Channel Detector

Enhanced Dual Channel Detector

'Robust and Versatile'

Offers all the standard features of the PD230 range plus additional features and functionality to simplify installation and improve performance and reliability.

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Product Features & Benefits

The PD270 can be used to identify the presence of vehicles by means of two independent inductive loops buried under the road and can be used for almost any vehicle detection application.

It includes A-B logic to detect the direction of vehicles, plus many new features including AFS (Automatic Frequency Selection), which ensures less set up time, thereby simplifying the installation of complex multilane access control sites. It also ensures a low cost of ownership.

PD270 detectors, part of the 7 series, are CE tested and approved and come with a 5-year manufacturer’s warranty.

Features

  • Automatic Frequency Selection (AFS) - automatically selects the best frequency setting
  • Diagnostic capabilities - enable accurate diagnosis of loop and installation problems using Nortech’s DU700
  • Configurable AB logic - selectable on the front panel, AB Logic functionality detects the direction that vehicles are travelling in
  • Selectable Permanent Presence - eliminating premature barrier, gate or bollard closure
  • Loop isolation protection and reduced interference
  • Automatic Sensitivity Boost (ASB) - facilitates the reliable detection of all vehicle combinations and high-bed vehicles
  • AFS override enables manual selection of one of four frequency options. Anti-locking - the detector automatically recovers from events that may cause it to be stuck in the detect state, reducing the the need to carry out a manual reset
  • Power fail feature - in the event of an interruption in the power supply, the detector returns to its detect/undetect state prior to the power failure. This prevents closing of the barrier, gate or bollard while a vehicle is present

Specifications

Self-tuning range: 20μH to 1500μH
Sensitivity: Four step adjustable on the front panel

Ranging from 0.01% DL/L to 0.10% DL/L

ASB (Automatic Sensitivity Boost) selectable
Frequency: Automatic Frequency Select (AFS) and separate option to select from 4 frequencies

(Frequency determined by loop geometry)
AB Logic: A to B (CH1) & B to A (CH2) Presence or Pulse Selectable
Response Time: 200 – 300ms
Presence Method:  Permanent or Limited
Presence Time: Permanent presence (infinite)

Limited presence - time dependant upon level of detect and environmental conditions
Power Fail Memory: Permanently on, Reset available to clear stored data
Drift Compensation: Incorporated automatic method of tracking changes caused by environmental conditions at a rate approximating 1% DL/L per minute (Presence Time)
Anti-locking (Positive DL/L): Incorporated algorithm accommodates the influence of positive inductance changes, the anti-lock time is 4 seconds
Recovery Time: Set to 80ms allowing for the detector to return to the ambient mode in preparation for arrival of the next detection
Output Configuration:  Two output relays

User configurable for: Presence on detect. Pulse on detect
Protection: Loop isolation transformer, zener diode clamping on loop input, gas discharge tube
Power: PD274: 12 to 24 V +/- 10% (AC/DC)

PD272: 230V +/- 10% AC