Sensor with 4-20mA output

[Brian Gregory [UK]]

A sensor needs to be modified to work off a 24V DC supply and provide a
4-20mA output.

How is this normally done?

Is it okay if the 4-20mA output has a common connection with the power
supply or should it be totally isolated. What is normally expected by
typical control equipment?

Someone must do this regularly.

--

Brian Gregory. (In the UK)
ng@bgdsv.co.uk
To email me remove the letter vee.

 

[Wouter van Ooijen (www.vo]

Is it okay if the 4-20mA output has a common connection with the power
supply or should it be totally isolated. What is normally expected by
typical control equipment?

All versions seem to exist, but AFAIK delivering current towards
ground is the most common (receiver is essentially a resistor to
gound).


Wouter van Ooijen

-- ------------------------------------
http://www.voti.nl
Webshop for PICs and other electronics
http://www.voti.nl/hvu
Teacher electronics and informatics

 

[Jasen Betts]

In article <N62dnQrzyNG0SoneRVnygg@pipex.net>, Brian Gregory [UK] wrote:

A sensor needs to be modified to work off a 24V DC supply and provide a
4-20mA output.

How is this normally done?

that depends on what the sensor needs to be modified from

Is it okay if the 4-20mA output has a common connection with the power
supply or should it be totally isolated. What is normally expected by
typical control equipment?

that depends...

Bye.
Jasen