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What size resistor to convert 4-20ma signal to voltage on a CB-50LP

i have a few doubts regarding the A-D conversion. i'm an amateur in instrumentation.

what will happen if i connect the 4-20mA signal to the 0-10v port?

is there any resistance for the A-D convertor?

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Message 11 of 14
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Hi,

 

It depends on the input resistance of your 0-10V port and of the accuracy you want.

You can put a 500Ohm resistor in parallel to your input to generate 0-10V from the current 0-20mA

The input resistance of the 0-10V input gives an error if it is low.

 

Does this help ?

 

Kees

 

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Message 12 of 14
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I am having Bosch make Pressure Transducer 0-250 Bar & giving feed back 4-20 mAmp while our PLC is having only 0-10V dc input signal to read.

Can I use my existing mAmp Pressure Transducer with any little modification?

If use? How?

 

Urvesh Mehta.

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Message 13 of 14
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Hi,

 

First of all it is better to start a new thread than replying on old or ancient threads.

 

Just do what I wrote in my previous reply. A resistor of 500Ohm in series in your 4-20mA loop and connect the resistor at the PLC input.

 

Kees

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Message 14 of 14
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