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  • MVP 2021

This module is somewhat unique in that the analog outputs have an option for +/- 10V instead of the normal 0-10V. The spec sheet says:

Quote

Resolution (except at 4-20mA)   12-bit (4096 units) + sign

This is not clear to me. Does this mean that the operand should range from -4095 to +4095 to output -10V to +10V, or does it mean -2048 to +2047? I suspect the latter (I guess it could be -2047 to +2048).

I guess there is one other possibility. It could be 0-4095 to cover the range -10V to +10V. In this case, the range I would be looking for with a 0-10V output would be 2048-4095?

It would be really nice if Unitronics had spec sheets that were a little more clear. Especially in this case, as it would be important to know what value corresponds to 0V.

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  • MVP 2021

IO-AI4-AO2                                        Input

 

                                                         Output

12 bit   (0-10V, 0-20mA,
4-20mA)
 

12 bit +sign ( ±10V, 0-20mA,
4-20mA)

0-4095, 4096 units (except at 4-20mA)
819 to 4095, 3277 units (at 4-20mA)

0-+4095(except at4-20mA)
819 to 4095, 3277 units (at 4-20mA)

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  • MVP 2021
44 minutes ago, kratmel said:

Two IO-AI4-AO2 modules are installed in my laboratory.  I'm trying to check it out tomorrow.

Thank you! I do not have one these modules and my first opportunity to test will be on a customer installation during commissioning. I'd rather not find out it's wrong at that point. They're less than $200, but I rather not spend the money if I can avoid it.

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