Datasheet

Page 6

Web: www.maxbotix.com

PD11500c

MaxBotix

Inc.

Patent 7,679,996

HRXL-MaxSonar

WR/WRC

™

Series

MaxBotix Inc., products are engineered and assembled in the USA.

Using Multiple Sensors in a single system

When using multiple ultrasonic sensors in a single system, there can be interference (cross-talk) from the other sensors.

Three methods are presented as an example for chaining the sensors. These methods of chaining work well to avoid the

issue of cross-talk.

The first method is AN Output Commanded Loop. The first sensor will range, then trigger the next sensor to range and

so on for all the sensors in the array. Once the last sensor has ranged, the array stops until the first sensor is triggered to

range again. Below is a diagram on how to set this up.

The next method is AN Output Constantly Looping. The first sensor will range, then trigger the next sensor to range and

so on for all the sensors in the array. Once the last sensor has ranged, it will trigger the first sensor in the array to range

again and will continue this loop indefinitely. Below is a diagram on how to set this up.

The final method is AN Output Simultaneous Operation. This method does not work in all applications and is sensitive

to how the other sensors in the array are positioned in comparison to each other. Testing is recommend to verify this

method will work for your application. All the sensors RX pins are connected together and triggered at the same time,

causing all of the sensors to take a range reading at the same time. Once the range reading is complete, the sensors stop

ranging until triggered next time. Below is a diagram on how to set this up.