MVP 2023 Flex727 Posted October 1, 2021 MVP 2023 Report Share Posted October 1, 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. Quote Link to comment Share on other sites More sharing options...
MVP 2023 kratmel Posted October 2, 2021 MVP 2023 Report Share Posted October 2, 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) Quote Link to comment Share on other sites More sharing options...
MVP 2023 kratmel Posted October 2, 2021 MVP 2023 Report Share Posted October 2, 2021 Information from Visilogic Help... Then Maybe +-4095 for +-10V output. Quote Link to comment Share on other sites More sharing options...
MVP 2023 Flex727 Posted October 3, 2021 Author MVP 2023 Report Share Posted October 3, 2021 18 hours ago, kratmel said: Then Maybe +-4095 for +-10V output. Thanks, @kratmel. I very much hope that's true, but that does contradict the statement that the output resolution has 4096 units because 0 to +/- 4095 is actually 8191 units. Quote Link to comment Share on other sites More sharing options...
MVP 2023 kratmel Posted October 3, 2021 MVP 2023 Report Share Posted October 3, 2021 Two IO-AI4-AO2 modules are installed in my laboratory. I'm trying to check it out tomorrow. Quote Link to comment Share on other sites More sharing options...
MVP 2023 Flex727 Posted October 3, 2021 Author MVP 2023 Report Share Posted October 3, 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. Quote Link to comment Share on other sites More sharing options...
MVP 2023 kratmel Posted October 4, 2021 MVP 2023 Report Share Posted October 4, 2021 Test result.... Two output configured via V1040 Voltage on Analog 0 Voltage on Analog 1 Laboratory setup. Analog IO not connected .. 1 Quote Link to comment Share on other sites More sharing options...
MVP 2023 Flex727 Posted October 4, 2021 Author MVP 2023 Report Share Posted October 4, 2021 Thank you so much, @kratmel! Quote Link to comment Share on other sites More sharing options...
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