Sabvoton 96120 to CA3 throttle resistor (Solved)

[Santacruz]

I will be externally wiring up my Sabvoton 96120 to a CA3.
I am in the process of making the CA3 6 pin wiring and plug.

Can anyone tell me if a 2KΩ resistor is needed in the throttle signal wire, from CA3 plug to throttle signal input on Sabvoton 96120.

 

[Santacruz]

I am bumping this up.

I am still confused about the external wiring of my controller to a CA3 on my new build. Namely the throttle.
My SVMC 96120 is almost finished with regard to wiring, except for the throttle to CA3.
I have asked QS motors where I got the controller, but they say they don't know about the resistor.
I have a wiring diagram I found on the internet that shows fitting a 2kΩ resistor in the controller throttle signal wire to the CA3 throttle signal input.
I have gone right through the CA unofficial guide and that mentions using a 1kΩ resistor.
I am totally confused.
Do I even need one, for as far as I can see, I can program the voltages for the throttle, through the CA3 and on my present bike that has a Kelly controller, I have wired that up the same way without any resistor and never had a problem.
I have searched this site, but cannot come up with any answer.

 

[wadmasritamam]

I Have the same setup as you but i have CA-HC . But i’m using an external shunt between the battery and the controller. The throttle is wired directly to the sabvoton. When i was doing my research I found out that there would be problems with CA 3. The versions i have is 2.4


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[amberwolf]

I have a wiring diagram I found on the internet that shows fitting a 2kΩ resistor in the controller throttle signal wire to the CA3 throttle signal input.

The throttle is wired directly to the sabvoton. When i was doing my research I found out that there would be problems with CA 3. The versions i have is 2.4

The 2.4 version doesn't do throttle limiting the same way as v3.x. It's designed to just pull down the throttle signal to stop the controller from doing anything once a limit is hit in the CA settings (whatever you've setup). So it needs the resistor to not "short out" the actual throttle.

The v3.x simply takes all the various inputs, including your actual throttle, compares them all to the various limits you've setup in it, and creates a throttle signal to output direclty to the controller. Since your actual throttle never connects to the controller, it's just a direct connection from CA's throttle out to the controller's throttle in.


AFAIK, there's no need for a resistor; none of the CA-DP connections in controllers setup for the v3.x CAs that I've seen have one.

If Grin Tech on http://ebikes.ca specifies the need for a resistor, for your specific wiring setup and your CA version, then you should use whatever they say.

If it's something you found on some external site, you would need to post a link to the specific reference, so it can be interpreted in context, as it may be recommended because of a very specific wiring setup or other reason.

 

[Santacruz]

Thank you for the replies.
I have also received an answer from Grin tech which is pretty clear.

If the throttle is plugged into the CA3, you don't need any resistor on the green wire from the CA3 to the controller. The resistor would be needed on the controller's throttle plug to make sure that a CA2 (not CA3) device could actually pull the throttle signal down if you exceeded a speed limit or power limit - reminder on a CA2 device, the throttle plugs into the controller, and the CA2 would connect to the same spot, but without the resistor in-place.