12V to Analog In possible?

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Silas
Posts:13
Joined:Tue Nov 01, 2016 8:26 pm
12V to Analog In possible?

Post by Silas » Thu Mar 16, 2017 6:29 pm

Hi. Can I give a 12V signal to any Analog Input for Lc or AC activation? Or does it kill the Emu?

Also in Manual says to use 5V+ Out from Emu with a 2.2k resistor to Analog Activation? Or can I use 5V without resistor to Analog?

PSI-Motor
Posts:455
Joined:Fri Aug 15, 2014 10:57 pm

Re: 12V to Analog In possible?

Post by PSI-Motor » Thu Mar 16, 2017 7:13 pm

12v is ok.
EcuMaster Sweden

Silas
Posts:13
Joined:Tue Nov 01, 2016 8:26 pm

Re: 12V to Analog In possible?

Post by Silas » Tue Jun 13, 2017 9:57 am

It does not work :-/

I used 12V + with a switch to Analog 2,
AC Clutch is on Aux6.

I set up correct in Software but when I click the switch nothing happens. But when I klick the Invert output the AC Turns on.

gregpe
Posts:204
Joined:Sun Sep 28, 2014 12:19 pm
Location:Cambridge, UK

Re: 12V to Analog In possible?

Post by gregpe » Tue Jun 13, 2017 10:34 am

is voltage varies on this analogue input?

pric
Posts:57
Joined:Sun Jun 19, 2016 2:41 pm
Location:Austria

Re: 12V to Analog In possible?

Post by pric » Tue Jun 13, 2017 1:04 pm

To make this work(if 12V is not a problem), your 12V and 5V source have to have the same ground reference.
>> You could try joining power and sensor ground together.

If it doesn't work either way, you can use a relay, your 12V source switches the relay, and the relay switches 5V to the analog input.
Mercedes C280 M104 Turbo

RHD
Posts:537
Joined:Tue Oct 07, 2014 4:28 pm

Re: 12V to Analog In possible?

Post by RHD » Fri Jun 16, 2017 9:35 am

I have seen this problem quite a lot recently, you need to check your other settings

if you DONT have sensors reading evap temp and system pressure then you need to set:

Min evap temp -1
AC pressure 0

do this and it will work :)

Silas
Posts:13
Joined:Tue Nov 01, 2016 8:26 pm

Re: 12V to Analog In possible?

Post by Silas » Sun Jun 18, 2017 1:37 pm

RHD wrote:I have seen this problem quite a lot recently, you need to check your other settings

if you DONT have sensors reading evap temp and system pressure then you need to set:

Min evap temp -1
AC pressure 0

do this and it will work :)
Thanks Mate, that works :-)

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