Loop Detectors for Single and Dual Loops

The LDD (DIN Rail) and LDP (Plug) series from Carlo Gavazzi are used to control the operation of parking barrier gates based on the inductance of the loop under the pavement.

1911np Carlogavazzi

They are also used in activation of retractable bollards (short vertical posts), ticketing machine systems, and occupancy counting in parking lots, streets, tool gantries, traffic light control and other places. The detectors are equipped with automatic loop frequency tuning and sensitivity tuning to provide easy installation. Automatic sensitivity boost (ASB) ensures a reliable detection of high-bed vehicles such as trucks or busses. The units work with 20 µH to 1000 µH loop input inductance, with sensitivity adjustment of 0.01% to 1%. Other features include multicolor diagnostics LEDs, fail safe and fail secure functions, two SPDT relay outputs, selectable output operation (pulse or presence), power supply range 24-240 VAC/DC, automatic or manual loop frequency tuning, and loop diagnostics capabilities to detect loop short/open circuit, inductance out of range and channel crosstalk.

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Carlo Gavazzi Inc.

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