Wavetronix SmartSensor HD User Manual page 11

For more information.
See the HD support
section of the
Wavetronix website
to learn more about
cable lengths.
10
SmartSensor HD User Guide
•
Make sure all monitored lanes are within 6 to 250 ft . (1.8 to 76.2 m)
˿
of the sensor. Up to 22 lanes can be detected.
If you're putting a sensor on a road with stoplights or stop signs,
˿
position the sensor toward middle of the block, to reduce the likeli-
hood of having stopped vehicles in the HD radar footprint.
Keep cable lengths in mind when you pick mounting locations;
˿
when you use the Wavetronix cable, cables can be as long as 600 ft .
(182.9 m) if you're using 24 VDC and RS-485 communications; for
longer connections, consider alternate wired and wireless options.
Consider timing: aft er a vehicle passes in front of the sensor, there's
˿
a slight delay before the data for that vehicle is sent from the sensor.
In a time-sensitive application, like supplying a variable message
sign with per vehicle warning messages, make sure the sensor is far
enough upstream from the sign that the system has time to collect
the data, process it, and send it to the sign by the time the vehicles
reach the problem area.
See if you can take advantage of any existing infrastructure in the
˿
area. Th e sensor can be mounted on existing poles (with the excep-
tion of wooden poles and trees), as long as they fall within the
acceptable off set range. You may also be able to tap into existing
cabinets, power sources, and communication networks. All of these
options could save you time and money.
Figure 3. Midblock installation