IVT-S Shut Inquiry

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FieroJam
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IVT-S Shut Inquiry

Post by FieroJam »

I did a search on this forum, but didn't get a straight answer.

Is it important to have CAN2 for the shunt or is CAN1 just fine?

I ask, because the IVT-S-1K-U3-I-CAN1-12/24 is in stock from a source I can get from, but not the CAN2 model.

This is in particular for a Zombieverter VCU for a Gen2 Nissan Leaf stack.

Many thanks,
Isaac96
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Re: IVT-S Shut Inquiry

Post by Isaac96 »

CAN1 has internal CAN termination resistor. You need to have 2 termination resistors, ideally at the 'ends' of the bus.
It really isn't too fussy at low bitrates over short distances.
With a Leaf stack you may have to be more careful, just remember that you have a resistor in your shunt.
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Re: IVT-S Shut Inquiry

Post by robertwa »

In my haste, I purchased a CAN1 internally terminated shunt without knowing any better. Using zombieverter and Lexus inverter (LS600H). What kind of issues should I look out for?
Thanks for your help
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Bigpie
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Re: IVT-S Shut Inquiry

Post by Bigpie »

Pretty sure you can open it up and remove the termination resistor
20211123_154108.jpg
This is inside my unterminated, if you can find the termination resistor on yours and desolder it, it'll be then unterminated :D If it's the same PCB, there's a couple of unpopulated pads, maybe it has 2 x 60R instead of a single 120R
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Re: IVT-S Shut Inquiry

Post by alexbeatle »

Bigpie wrote: Thu Feb 16, 2023 9:07 am Pretty sure you can open it up and remove the termination resistor
20211123_154108.jpg
This is inside my unterminated, if you can find the termination resistor on yours and desolder it, it'll be then unterminated :D If it's the same PCB, there's a couple of unpopulated pads, maybe it has 2 x 60R instead of a single 120R
Thank you!
Mine has 2x 60ohm resistors in series and a capacitor in between. Does the capacitor need to be removed too?
IMG_20231014_210131_edit_925154454136435.jpg
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Bigpie
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Re: IVT-S Shut Inquiry

Post by Bigpie »

yep, take em off, mine looks to not have all 3.
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Re: IVT-S Shut Inquiry

Post by Zieg »

Well if they're all in series then really you only need to remove one, right?
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Re: IVT-S Shut Inquiry

Post by Bigpie »

images.png
images.png (1.19 KiB) Viewed 4509 times
I'd remove both resistors to be sure, but I'm no expert.
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Re: IVT-S Shut Inquiry

Post by Zieg »

Oh, that's interesting. In that case, I agree!
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