question

mahargrenrut avatar image
mahargrenrut asked

VE Bus cabling

I have multiple VE Bus products that all connect using VE Bus cabling.


2 x Multiplus (paralleled)

1 x bms

1 x cerbo

1x ac detect

1 x Mtiplus control panel

My question is: Is there an order to connecting the VE bus rj45 connectors? Or can I connect from one unit (in) and (out) to the next device creating a ri g network.

Is VE bus use a backbone network protocol and communicates with everything at the same time or do I have to connect each item in a certain sequence?

Thanks in advance

Graham

cerbo gxBMSmultiplus ve.bus
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5 Answers
Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

I guess with "BMS" you mean a VE.Bus BMS.
There are many example diagrams in the manual.

https://www.victronenergy.com/upload/documents/Manual-VE-BUS-BMS-EN-NL-FR-DE-SE-.pdf

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mahargrenrut avatar image
mahargrenrut answered ·

Hi Matthias, thanks for you answer. While the bms manual shows many configurations I still cannot find an answer to the question regarding VE BUS.

Is it a network based protocol and does it matter which device is connected as long as all devices are connected on a ring (in and out) ?

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Matthias Lange - DE avatar image Matthias Lange - DE ♦ commented ·
You have to wire it as it is shown in the manual.

You can't just plug in the RJ45 as you want.
Between your two MultiPlus' you just need one RJ45 cable from one unit to the other.

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mahargrenrut avatar image
mahargrenrut answered ·

20220407-094519.jpg


OK so if I follow the manual can you please explain where I now plug in my Cerbo unit?


Many thanks

Graham




20220407-094519.jpg (578.6 KiB)
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Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

A GX device (Color Control GX in the picture) have t be connected to the MultiPlus/Quattro.

1649319170822.png


1649319170822.png (391.0 KiB)
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mahargrenrut avatar image
mahargrenrut answered ·


img-20220407-wa0003.jpgI have spoken to a Victron dealer and this is how you connect multiple Multiplus' withitium bms and a cerbo.




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