Using AI 16 CH Active Cards for some 4 wires signals

Dear All,

in my project, some signals have been added that generated by analyzers. these signals are 4 wires (it means DCS cards should be Passive), but i have only some AI cards 16 CH with 2 wires Terminal Block ( Active AI Card).

is it possible to use the existing AI modules (Active AI Cards) for these kind of signals? if Yes, how can i use the 16 CH AI cards for 3 wires signals? 

Thanks and Regards

Pouya

  • You would need some sort of isolation barrier or converter to relay the 4 wire signal to a 2 wire signal for use on the AI card.
     
    From: Pouya [mailto:bounce-Pouya@community.emerson.com]
    Sent: Tuesday, May 27, 2014 7:08 AM
    To: DeltaV@community.emerson.com
    Subject: [EE365 DeltaV Track] Using AI CH Active Cards for some 4 wires signal
     

    Dear All,

    in my project, some signals have been added that generated by analyzers. these signals are 4 wires (it means DCS cards should be Passive), but i have only some AI cards 16 CH with 2 wires Terminal Block ( Active AI Card).

    is it possible to use the existing AI modules (Active AI Cards) for these kind of signals? if Yes, how can i use the 16 CH AI cards for 3 wires signals?

    Thanks and Regards

    Pouya

  • In reply to AdrianOffield:

    Thank you

  • In reply to Pouya:

    HI,

    YES, you can use them you connect the Analog measure + signal to the Even numbers (- ) and connect the measure - wire to the shielding bar.

    You feed the suplly from some other place to the field device..

    Niklas Flykt 

    Klinkmann Oy

    Key Account Manager safety products

    nikfly@gmail.com

  • Given that the AI card also supplies power to the device, won’t this cause other problems if powered externally?
     
    From: Niklas Flykt [mailto:bounce-nikfly@community.emerson.com]
    Sent: Tuesday, May 27, 2014 8:17 AM
    To: DeltaV@community.emerson.com
    Subject: RE: [EE365 DeltaV Track] Using AI 16 CH Active Cards for some 4 wires signals
     

    HI,

    YES, you can use them you connect the Analog measure + signal to the ODD numbers (- ) and connect the measure - wire to the shielding bar.

    You feed the suplly from some other place to the field device..

  • In reply to AdrianOffield:

    Hi,

    when I have connected them like there has been no problems.

    If you want it totally passive you have to change the base plate to the passive version..hmm 16..8 channels?

    EDIT: You might have to have the supply from the same power source as the cards...Geeked

    Niklas Flykt 

    Klinkmann Oy

    Key Account Manager safety products

    nikfly@gmail.com

  • In reply to Niklas Flykt:

    Dear Niklas

    Thanks a lot

    Hence for example, for channel 1,  i will connect the Signal (+) to Terminal Number 2 (NOT 1) and then connect the Signal(-) to shield bar, NOT to terminal number 2. am i right?

  • In reply to Pouya:

    Dear Pouya,

    That is right, it should work if you field equipment isn´t using some odd voltage in analog loop. (e.g. Siemens s7-1200 AO is 15 volts max... ).

    Connect one loop and see if it works.

    Niklas Flykt 

    Klinkmann Oy

    Key Account Manager safety products

    nikfly@gmail.com

  • In reply to Niklas Flykt:

    Very Good, Many, Many Thanks Niklas.

    i will inform you about my test.

    Best Regards

  • In reply to Pouya:

    In case this question was raised for an M-series 16 Channel AI Card, we have a new Terminal block available which will be able to deal with a 4-wire Transmitter,

    in the same straight  forward way, like for a 2-wre Transmitter !

    Checkout the following PDS and Page 25:

    www2.emersonprocess.com/.../PDS_M-series_Traditional_IO.pdf

    VE4003S2B6 vs. VE4003S2B7