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Discussion Groups | BasicX | 4-20mA output
Discussion forum for the BasicX family of microcontroller chips.
4-20mA output - davi...@sapo.pt - Jul 19 13:32:15 2009
Hello group
I'm tryng to use Bx24 in a project that requires that one of the BX
output pins delivers 4-20mA...
Any ideas on how this can be done?
Thanks
Regards
David Mendes
------------------------------------
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
I'm tryng to use Bx24 in a project that requires that one of the BX
output pins delivers 4-20mA...
Any ideas on how this can be done?
Thanks
Regards
David Mendes
------------------------------------
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Re: 4-20mA output - Tom Becker - Jul 19 14:36:59 2009
> ... 4-20mA...
Analog or digital? Do you need to send a metered value or a switched
signal? Analog current loops, as I recall, use a 16mA swing,
zero-to-full-scale. Digital is either 4ma or 20mA drawn through the
loop. Also, do you need to supply loop power?
Tom
------------------------------------
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Analog or digital? Do you need to send a metered value or a switched
signal? Analog current loops, as I recall, use a 16mA swing,
zero-to-full-scale. Digital is either 4ma or 20mA drawn through the
loop. Also, do you need to supply loop power?
Tom
------------------------------------
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Re: 4-20mA output - rosa...@aol.com - Jul 19 15:12:48 2009
?
Hi,
Here is a link that sale one RS 232 to current converter for under 32 dollars.
?
http://www.l-com.com/item.aspx?id=6981
?
?
Regards,
rosarite
-----Original Message-----
From: d...@sapo.pt
To: b...@yahoogroups.com
Sent: Sun, Jul 19, 2009 12:31 pm
Subject: [BasicX] 4-20mA output
Hello group
I'm tryng to use Bx24 in a project that requires that one of the BX
output pins delivers 4-20mA...
Any ideas on how this can be done?
Thanks
Regards
David Mendes
------------------------------------
______________________________
Stellaris® MCU Family: New Parts, New Package, New Price.
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Re: 4-20mA output - davi...@sapo.pt - Jul 19 16:04:04 2009
Hello Tom!
Those are hard questions!
From what I understand, the idea is to put the microprocessor to
simulate the behaviour of an analog 4-20mA sensor...
So, depending on the values received on some certain input pins, the
currente of the output pin should vary from 4-20mA...
Is this possible to do with BX24?
Otherwise, I dont know what you mean by "metered value", "switched
value", "16mA swing"...
Thanks for the quick answer
David M.
Citando Tom Becker:
> > ... 4-20mA...
>
> Analog or digital? Do you need to send a metered value or a switched
> signal? Analog current loops, as I recall, use a 16mA swing,
> zero-to-full-scale. Digital is either 4ma or 20mA drawn through the
> loop. Also, do you need to supply loop power?
>
> Tom
> ------------------------------------
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Those are hard questions!
From what I understand, the idea is to put the microprocessor to
simulate the behaviour of an analog 4-20mA sensor...
So, depending on the values received on some certain input pins, the
currente of the output pin should vary from 4-20mA...
Is this possible to do with BX24?
Otherwise, I dont know what you mean by "metered value", "switched
value", "16mA swing"...
Thanks for the quick answer
David M.
Citando Tom Becker
> > ... 4-20mA...
>
> Analog or digital? Do you need to send a metered value or a switched
> signal? Analog current loops, as I recall, use a 16mA swing,
> zero-to-full-scale. Digital is either 4ma or 20mA drawn through the
> loop. Also, do you need to supply loop power?
>
> Tom
> ------------------------------------
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Re: 4-20mA output - PFiX Controls - Jul 19 16:11:53 2009
David,
I have used the AD420... component for years with great success!
Single unit prices are about $19 per component, but you get what you pay
for.
It requires using 3 BX pins for SPI comm with the chip. Sending it a zero
results in 4mA output. Sending it 65535 results in 20mA output. No need for
calibration. Needs 4 ceramic caps. This is a very good chip.
Let me know if you want to use it, I have lots of software and experience.
Chuck
----- Original Message -----
From:
To:
Sent: Sunday, July 19, 2009 12:31 PM
Subject: [BasicX] 4-20mA output
> Hello group
> I'm tryng to use Bx24 in a project that requires that one of the BX
> output pins delivers 4-20mA...
> Any ideas on how this can be done?
> Thanks
> Regards
>
> David Mendes
> ------------------------------------
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
I have used the AD420... component for years with great success!
Single unit prices are about $19 per component, but you get what you pay
for.
It requires using 3 BX pins for SPI comm with the chip. Sending it a zero
results in 4mA output. Sending it 65535 results in 20mA output. No need for
calibration. Needs 4 ceramic caps. This is a very good chip.
Let me know if you want to use it, I have lots of software and experience.
Chuck
----- Original Message -----
From:
To:
Sent: Sunday, July 19, 2009 12:31 PM
Subject: [BasicX] 4-20mA output
> Hello group
> I'm tryng to use Bx24 in a project that requires that one of the BX
> output pins delivers 4-20mA...
> Any ideas on how this can be done?
> Thanks
> Regards
>
> David Mendes
> ------------------------------------
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Re: 4-20mA output/0-10 V output - davi...@sapo.pt - Jul 19 18:34:29 2009
thanx, chuck, that looks like solving the problem...
What if I want a 0-10V output pin?
Regards
David
Citando PFiX Controls:
> David,
>
> I have used the AD420... component for years with great success!
> Single unit prices are about $19 per component, but you get what you pay
> for.
> It requires using 3 BX pins for SPI comm with the chip. Sending it a zero
> results in 4mA output. Sending it 65535 results in 20mA output. No need for
> calibration. Needs 4 ceramic caps. This is a very good chip.
>
> Let me know if you want to use it, I have lots of software and experience.
>
> Chuck
> ----- Original Message -----
> From:
> To:
> Sent: Sunday, July 19, 2009 12:31 PM
> Subject: [BasicX] 4-20mA output
>> Hello group
>> I'm tryng to use Bx24 in a project that requires that one of the BX
>> output pins delivers 4-20mA...
>> Any ideas on how this can be done?
>> Thanks
>> Regards
>>
>> David Mendes
>> ------------------------------------
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
What if I want a 0-10V output pin?
Regards
David
Citando PFiX Controls
> David,
>
> I have used the AD420... component for years with great success!
> Single unit prices are about $19 per component, but you get what you pay
> for.
> It requires using 3 BX pins for SPI comm with the chip. Sending it a zero
> results in 4mA output. Sending it 65535 results in 20mA output. No need for
> calibration. Needs 4 ceramic caps. This is a very good chip.
>
> Let me know if you want to use it, I have lots of software and experience.
>
> Chuck
> ----- Original Message -----
> From:
> To:
> Sent: Sunday, July 19, 2009 12:31 PM
> Subject: [BasicX] 4-20mA output
>> Hello group
>> I'm tryng to use Bx24 in a project that requires that one of the BX
>> output pins delivers 4-20mA...
>> Any ideas on how this can be done?
>> Thanks
>> Regards
>>
>> David Mendes
>> ------------------------------------
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )