Hall Effect Inputs Voltage Level?

Discuss which Sensors work best with these ECUs and share how you are using inputs and outputs
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cooberpedy
Posts: 21
Joined: Wed Sep 28, 2016 11:42 am
ECU Model: S100 Pro
Firmware Version: 89.00
Location: Germany

Hall Effect Inputs Voltage Level?

Post by cooberpedy »

Hi all!

In the wiring diagram for my S100, there is a note, related to the crank and cam inputs, that they can be driven with a 12V square wave input. Does anyone know if this is also the case for the wheel speed inputs?
All my hall sensors operate from a 12V supply and i would like to keep my wiring as simple as possible, rather than inserting level shifters.

cheers Cornel
Last edited by cooberpedy on Fri Dec 02, 2016 5:59 am, edited 1 time in total.
Alex DTA
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ECU Model: S40 Pro
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Re: Hall Effect Inputs Voltage Level?

Post by Alex DTA »

Yes, you can power the wheel speed sensors from 12v.
cooberpedy
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ECU Model: S100 Pro
Firmware Version: 89.00
Location: Germany

Re: Hall Effect Inputs Voltage Level?

Post by cooberpedy »

thanks!
;)
stevieturbo
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Re: Hall Effect Inputs Voltage Level?

Post by stevieturbo »

A lot of hall sensors output 0-5v anyway, even if they are fed with 12.
Rob Stevens
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Re: Hall Effect Inputs Voltage Level?

Post by Rob Stevens »

I thought the 5v came from the ecu and the hall sensor just pulled that to ground.
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ignitionautosport
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Re: Hall Effect Inputs Voltage Level?

Post by ignitionautosport »

Rob Stevens wrote:I thought the 5v came from the ecu and the hall sensor just pulled that to ground.
Depends on the hall sensor; a GT101 sits slightly higher and depending on software the trigger level can be set to work without a pullup. YMMV.
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stevieturbo
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Re: Hall Effect Inputs Voltage Level?

Post by stevieturbo »

Rob Stevens wrote:I thought the 5v came from the ecu and the hall sensor just pulled that to ground.
The couple of sensors I tried for cam triggers ( one a generic threaded piece ) and the other an OEM, I just fed them with vehicle 12v but they still output a switched 0/5v signal.

Havent tried a 101 though, but pretty sure you're right they do just pull to ground as an NPN sensor
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