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Circuit Board Detector PLD/2 Single and Dual Channel Loop Detector Home > Products > Door/Barrier/Parking > Circuit Board Detector Application range | Features | Function description | Technical data Connections | PDF download Application range Designed for use in integrated electronic control systems Vehicle detection for door, gate, and barrier control Vehicle detection depending on traffic direction (PLD2/2) Safeguarding and monitoring e.g. of conveyor systems and car-wash plants Detail view Features Compact design >Molex-connector for easy installation and adaptation Fast automatic alignment provides simple initial operation Continuous adjustment of frequency drifts e.g. due to changing temperature and humidity LED indicators for loop failure report (switchable occupancy report on failure)> Switchable automatic adjustment after fault Adjustable sensitivity Relay output: Permanent or impulse mode Switchable turn on/off delay time Switchable impulse signal when leaving the loop Special software for traffic applications (optional) Function description The induction impulse transmitter PLD1/2 and PLD2/2 analyse loops laid in the ground. These represent the inductivity of a high frequency oscillator circuit. The metal body of a vehicle passing the loop causes a change of the frequency of the oscillator circuit. The loop detector analyses this and sends a switching signal via a dry relay. This is also displayed on the front LEDs. The analysis of the loop frequency is performed by a microprocessor that automatically adjusts to the existent frequency and automatically compensates changing loop inductivities due to temperature, humidity or aging of components. The PLD/2's circuit board design is ideal for applications in integrated electronic control systems.

Technical data Power supply 24 V DC +/-10 % (other voltage versions on request) Power consumption 3 W Operating temperature -25°C to +70°C Storage temperature range -40°C to +80°C Dimensions H = 70 mm, W = 100 mm, D = 22 mm Connections via 10-pin or 14-pin Molex connector (type 2145/3215 KK 3.96 mm) Weight 70 g Tuning range 15 µH to 2000 µH (recommended range 100 µH to 300 µH with max. 30 W) Sensitivity (adjustable per channel) 7 levels from High 0.01 to Low 0.9 (adjustment of frequency in %) Operational modes impulse 100 ms (optional 1s) and permanent mode Adjustment automatic after power-on, after pushing reset switch, external reset Output dry relay contacts Umax = 250 V, Imax = 2 A, Pmax = 60 W (ohmic resistance) optional: Open Collector Displays LED red = loop failure, LED green = detection, LED yellow = blinking when alignment / power Safety circuit Loop input galvanic separation by transmitter, glow lamps Connections Molex connector EC Conformity Requirements for the usage according to regulations Requirements acc. to ETSI EN 300330-1 (2002-12) For the antenna factor (loop area A in m2 multiplied by the number of loop windings N) the following is imperative: N*A <= 60 m2 Product class 2: Product class 3: Max. length / width 30 m Area < 30 m2 Area > 30 m2 Number windings > 1 Number windings 1 Constraints for the compliance with EN 300330-1 According to the stated formula, the following loop windings in dependence to the loop area are recommended: Product class acc. to EN 300330-1 Area [m2] Number windings Lloop [µH] 2 (1-3) 6 100-300 (3-5) 5 80-260 (5-10) 4 160-320 (10-15) 3 180-280 (15-30) 2 80-180 3 (30-60) 1 40-100 Operating frequency range (L = 15 µH - 400 µH) 20.05 kHz < f < 70 kHz Total inductivity (loop + feed cable) Specification: Ltotal < 400 µH Example: Loop inductivity 200 mH; feed cable inductivity < 200 µH with 100 µH / 100 m: length of feed cable < 200 m Requirements acc. to DIN EN 60950 The device has basic insulation. PDF download Data sheet PLD/2 User manual PLD/2 To view a PDF file you need Adobe Acrobat Reader which is available free of charge at Adobe's website. More downloads: Home > Downloads © 2001 WEISS-ELECTRONIC GmbH - Niederkircher Straße 16 - 54294 Trier - Germany Company | Projects | Systems | Products | Services | Download | Contact