Jump to content

Snap-On Module V200-18-E1B

Recommended Posts

I am wiring an analog input into a V200-18-E1B snap-on module. I look at the installation guide and it is telling me that for a two wire 4-20mA connection I should wire 0V to the 0V input and then the signal should be wired to both the I input and the V input. Why must the signal wire be in both of these inputs and not just the I input?

Link to comment
Share on other sites

  • MVP 2023

You have to connect I and V together because the I input is just a precision resistor to the 0V terminal. You still use the V input to read the voltage across it. Since the module knows the value of the resistor, it can translate the value of the input current from the voltage.

This is the way all analog inputs work on all products. An A/D converter is nothing more than a voltmeter.

Joe T.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...