724 - Western Pacific Signal, LLC

Model 724 Four Channel Loop Detector

The Naztec Model 724 Four-Channel Inductive Loop Detector uses state of the art technology to provide a robust and reliable rack mounted vehicle detection device. Automatic self-tuning and fifteen selectable sensitivity levels ensure trouble-free operation. Crosstalk between adjacent loops is minimized by selecting one of four different oscillator frequencies for each loop. Crosstalk between adjacent channels is eliminated by sequential scanning. As each loop is scanned, the other 3 channels are turned off. The Model 724 is capable of two operating modes. In Pulse Mode, the detector provides a 150 millisecond pulse in response to a detection, useful for counting and volume calculations. In Presence Mode, the output from the detector is active as long as a vehicle is present on the loop. The use of separate LEDs for detection and fault information eases setup and diagnostics. The DETECT LED indicates when a vehicle is on the loop or if Delay or Extension is active A 2 Hz flash rate indicates Delay, while an 8 Hz flash indicates Extend. The FAULT LED uses 8 Hz, 2 Hz, 1/2 Hz, and continuous-on modes to indicate loop shorted, opened, inductance change of more than 25%, and watchdog reset, respectively.

Features

Rack-mounted, self-tuning four channel model
Fifteen switch-selectable sensitivity levels per channel
Turn channel off by setting sensitivity to zero
Sequential scanning operation and four switch-selectable frequencies per channel minimize cross-talk
Two selectable operating modes: Pulse and Presence
Detection LED provides separate indications for presence, delay, and extension per channel
Diagnostic LEDs indicate four types of faults for each channel
Reset button to clear faults and re-tune
Meets or exceeds NEMA TS1 and Caltrans detector specifications