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2mas asked

REC BMS to Victron Cerbo Cabel DIY

Hallo All Victron lovers :-)


I need to make a cusom cabel from my REC BMS to GX Cerbo

I got the the SUB-D db9 and RJ45

i think :-) it is like this:


REC-BMS SUB-D:

Pin 2 - CAN L

Pin 3 - GND

Pin 7 - CAN H


Cerbo GX RJ45:

Pin 3 - GND

Pin 7 - CAN H

Pin 8 - CAN L


Right ??

or shall the CAN H and CAN L Crosset like TX and RX normally should?


Skærmbillede 2023-10-13 075424.png


cerbo gxBMSVE.Canmodifications
skærmbillede-2023-10-13-075424.png (90.9 KiB)
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Mike Dorsett avatar image Mike Dorsett commented ·
No Can High and Can low do not get crossed. You also need to ensure there is a terminating resistor at each end. Measure can-h to can-l should measure 120 ohms before plugging in.
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Related Resources

Experiments, Modifications and Adaptions. Mods (Modifications) can be made to Victron Software by the Community. Please use the modifications space for enthusiasts who want to push what is possible, without official Victron Support.

Cerbo GX product page

GX family product range

Cerbo GX & GX Touch datasheet

Cerbo GX Manual

Venus root access document

Victron VE.Bus BMS product page

Victron 3rd party BMS compatibility page

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