Luke Barber Posted September 19, 2016 Report Share Posted September 19, 2016 Hi, Ccan anyone tell me where to find on the web a small 12 volt PLC (to use on a motor vehicle) with 8 inputs and 8 outputs. 2 or 4 of the 8 outputs must be analogue outputs? Thanks Quote Link to comment Share on other sites More sharing options...
MVP 2021 Joe Tauser Posted September 19, 2016 MVP 2021 Report Share Posted September 19, 2016 12V PLCs are kind of hard to come by, especially one with any kind of capability. Plus, this is the Unitronics forum so it's kind of blasphemous to recommend competitor's products. I have used one of these 12-24V converters when I've done a vehicle application: https://www.amazon.com/SMAKN-Converter-Module-adaptor-Regulator/dp/B00VRAQZVK/ref=sr_1_1?ie=UTF8&qid=1474326384&sr=8-1&keywords=12+to+24+volt+converter They work quite well, and now you can use any of our products. Joe T. Quote Link to comment Share on other sites More sharing options...
Luke Barber Posted September 20, 2016 Author Report Share Posted September 20, 2016 Hi Joe, Thank you for the fast response. I was looking at an option from Weidmuller. I do use couple of Unitronics products. Quote Link to comment Share on other sites More sharing options...
MVP 2021 Joe Tauser Posted September 21, 2016 MVP 2021 Report Share Posted September 21, 2016 It looks like those are AC input supplies. Joe T. Quote Link to comment Share on other sites More sharing options...
Kikis Posted September 21, 2016 Report Share Posted September 21, 2016 On 9/20/2016 at 2:07 AM, Joe Tauser said: 12V PLCs are kind of hard to come by, especially one with any kind of capability. Plus, this is the Unitronics forum so it's kind of blasphemous to recommend competitor's products. I have used one of these 12-24V converters when I've done a vehicle application: https://www.amazon.com/SMAKN-Converter-Module-adaptor-Regulator/dp/B00VRAQZVK/ref=sr_1_1?ie=UTF8&qid=1474326384&sr=8-1&keywords=12+to+24+volt+converter They work quite well, and now you can use any of our products. Joe T. +1 on Joe's suggestion. I have also used this kind of DC step-up modules many times in the past with no problems. They are cheap and reliable. I think it's the best solution when 24VDC power supply can't be used. Quote Link to comment Share on other sites More sharing options...
MVP 2021 Ausman Posted September 21, 2016 MVP 2021 Report Share Posted September 21, 2016 As far as I know, some of the M91 series are 12V capable, but not the ones with analogue outputs. However, you might be able to add a simple 485 bus addition to them that can give you AOs. This might also work in better with your application if the bus module is close to your AO driven devices, with the PLC tucked away somewhere else. But your desired AO speed might also be an issue with this method. cheers, Aus Quote Link to comment Share on other sites More sharing options...
cantcliff Posted September 26, 2016 Report Share Posted September 26, 2016 Automotive DC power is notoriously noisy so you're better off using some sort of power supply convert up to 24V to ensure a clean power signal, at a minimum you should have some sort of power conditioner/regulator to ensure a stable input. Quote Link to comment Share on other sites More sharing options...
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