Hello! This is Tom Bonar from MaxBotix Inc. I saw your forum post and would like to give some information regarding your application.
In your application you mentioned that you are planning a project with 20 range finders.
The first thing I would like to recommend is use a star topology for your power and ground. In this system setup, each item has its own power and ground running back to the source. If one component has a high current draw, such as a motor, only that component will have it’s voltage reduced. This voltage reduction is due to resistance in the wiring. The item with the high current draw, along with the associated changes to both the power and ground, are isolated from all of the other items being powered. A diagram and full explanation of this can be found in our article entitled "MaxSonar Operation on a Multi-Copter", under a section entitled "Grounding and Power".
In your application you also mentioned the use of cables 10 meters long, as well as an expressed concern about interference.
If you are a using a shielded cable, such as the MB7954, with proper connections you should be able to run cables a long distance with no interference. We have used this cable for stretches up to 1000 feet with no interference.
Finally, you mentioned that you wanted each range finder to measure distance 10 times per second.
If you are chaining the sensors in such as way where each sensor is commanded the next sensor in the sequence to range, each sensor will only range when it is commanded. So in your case, if 20 sensors are used in the chain, each sensor will only range 1 time every 2 seconds. You will still get 10 range readings each second, but each range reading will come from a different sensor in the chain. For information regarding chaining, we have an article entitled "Using Multiple MaxSonar® Sensors Simultaneously".
Does this information help with your application? If you need additional assistance, please don't hesitate to email me.
Please let me know if you have any questions.
of MaxBotix Inc.