question

kienan-maxfield avatar image
kienan-maxfield asked

Maximum length for VE. Can

I don't know if any of the engineers actually read this forum, but I'm hoping to find out the maximum allowable cable length for the VE. Can interface cables. I intend to build my own cables using high-quality shielded cable (probably Cat7) so the attenuation and interference should not be a problem. I only wonder what the maximum latency is...


I can find information on the maximum cable length on the VE. Bus. People on the forums are saying that they're having trouble with longer cables, but the literature seems to indicate that you should be fine as long as the total cable length doesn't exceed 100 meters. Therefore, I believe that these people would do better with larger shielded cables since the literature seems to indicate that they shouldn't have latency problems, but I have found no such literature for the VE. Can.


I'm trying to mount the GX 70 upstairs quite a ways from the battery room. I figured I'd just locate the Cerbo GX up next to the GX 70 location.


If anyone can help, or if anyone can tell me who to contact, I'd really appreciate it!


Thanks!

wiringVE.BusVE.Can
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2 Answers
shaneyake avatar image
shaneyake answered ·

The Spec for 250kbit/s CAN bus is 250 meters. VE.CAN at a hardware level is just normal 250kbit/s CAN bus. So anything less than 200 meters is probably fine as long as the termination resistors are installed.

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I forgot to mention, cable should be shielded Cat 6-7 cable. Thanks Peter for reminding me.
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Peter Buijs - NL avatar image
Peter Buijs - NL answered ·

With longer distances it is importand to use the correct cabling, Cat7 is for Ethernet, CAN cable has 2 pair of wires each shielded sperately, the data wires are thin, the power wires are thicker. NMEA2000 literature and Actisense literature will help you.

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