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Sensor Forum Question regarding the wiring of Sensotec Pressure sensor
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Question regarding the wiring of Sensotec Pressure sensor

Former Member
Former Member over 10 years ago

 

@

Hi Friends,

This is Ali, with the University of Manitoba, Winnipeg, MB, Canada. We have Pressure sensors  (Sensotec-FPG/C798 : 3000psig) in our laboratory. These sensors have 4 wires.

Would you please help me have an electrical schematic of the wiring? I am supposed to connect it to a DAQ board, and need to know which of these 4 wires (i.e. black, green, white, red) are ground, positive pole and negative pole? I found the following two wires are connected together:

- white and red,

- black (alone),

- green (alone).

which of them is ground? which is positive pole and which is negative pole? Do I have to connect the negative pole to the ground by means of a jumper while connecting it to DAQ board?

Thanks in advance.

Ali

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  • michaelwylie
    0 michaelwylie over 10 years ago

    Check here:

    https://stevenengineering.com/tech_support/PDFs/31SENSOTEC.pdf

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  • Former Member
    0 Former Member over 10 years ago in reply to michaelwylie

    Thanks for sending the link. As I am in  mechanical engineering, I am not sure about some concepts. In page 41 / 484 of this catalogue, the followings are defined:

    RED:   +   Excitation

    BLACK:  - Excitation

    GREEN:  -  Output

    WHITE:   +   Output

     

    For my case, red and white are connected together. So I am three wires other side: 1) White and Red, 2) Black, 3) Green.

    Now, which of them is defined as ground, and which one is Negative? I think the white and red is positive.

    For connecting it to the DAQ board, I need to know which one is positive, ground and negative.

     

    Thank you in advance.

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  • michaelwylie
    0 michaelwylie over 10 years ago in reply to Former Member

    Do you have ant more information about the full model number?

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  • Former Member
    0 Former Member over 10 years ago in reply to michaelwylie

    Hi Michael,

    Thank you for your support. I found the following info on the sensor:

     

    SENSOTEC

    FPG

    Order No.: FPG1DN,2D5D6A

    Part No.: 060-C798-03

    Supply: 9-28 VDC

    Output: 0-5 VDC

     

    Two pictures are attached. Hope to be helpful to you.

     

    Thanks again

     

    Aliimageimage

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  • michaelwylie
    0 michaelwylie over 10 years ago in reply to Former Member

    There is something odd about this. Maybe the connector at the top was custom wired. Unscrew the black cap and take a photo of the cable connector (looking at the pins) and the transducer connector side by side. The red and white, since they are wired together, would seem to be the negative references (ground), but that contradicts the datasheet.

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  • Former Member
    0 Former Member over 10 years ago in reply to michaelwylie

    There are 6 wires on the transducer side. but only 4 wires (i.e. black, green, white, red) are in other side !!!!. Please see the following photos. Thanks for your time.

    imageimageimageimage

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  • michaelwylie
    0 michaelwylie over 10 years ago in reply to Former Member

    According to the datasheet:

    A is the +Supply

    B is the -Supply

    C is the -Output 0 Vdc to 5 Vdc

    D is the +Output

     

    So Black is the positive supply,

    White is the negative supply (ground),

    Red is the negative output (ground),

    and Green is the positive output.

     

    This explains why the red and white are tied together, since they are both intended to be the common or ground. In the end, red and white are ground, black is the input voltage, and green is the output voltage. Here is the table from the datasheet:

    image

     

    You should double check this information before hooking it up, this only represents my opinion and I won't be liable if it gets wired wrong (I had to throw this in here to cover my butt).

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  • Former Member
    0 Former Member over 10 years ago in reply to michaelwylie

    Thank you so much. Really appreciate.

    Ali

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  • michaelwylie
    0 michaelwylie over 10 years ago in reply to Former Member

    Your welcome. Label those wires for the next guy image.

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  • Former Member
    0 Former Member over 10 years ago in reply to michaelwylie

    Sure. You are right. image

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