• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Subscribers 102 subscribers
  • Views 336 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Looking for help on choosing MCU for designing an industrial heating controller.

Datïan
Expert 1295 points
Other Parts Discussed in Thread: MSP430FR2355

Hi everybody,

I'm Datïan. I'm going to design a MCU based device via SSRs (Solid State Relay) to control multiple channel of AC 220V load which heats some kind of fluid material. The measuring range of operation temperature is from -58 oF to 572 oF ( -50 oC to 300 oC). Could you give some advice on choosing the type of controller and SSR?
Best regards
Datïan
2019.08.23

  • 0
    TI__Genius 12315 points

    Hello,

    It doesn't make sense that system needs -30 oCto 300 oC operation temperature. The system should be put in other places rather than place which would be heated. And there is no device supporting 300oC condition. For industrial application, the usual operation temp range is -40~105 oC. And your main function is to measure the temperature via ADC and amplifier and control the SSRs through GPIO. I would like to recommend MSP430FR2355 which includes a 12-bit SAR ADC and four configurable signal-chain modules called smart analog combos, each of which can be used as a 12-bit DAC or a configurable programmable-gain Op-Amp

  • 0 in reply to Winter Yu
    Expert 1295 points

    Hi Winter,

    Thank you very much for your recommendation and information. I think it is hard to put controller too far away from the heating source. The ethernet and RS485 are also neede.

    Datïan

  • 0 in reply to Datïan
    Guru 88700 points

    Standard reflow temperature is I think around +250C, so make sure your solder doesn't melt.

    The HT83C51 is rated up to +225C, but the data sheet claims it will operate (de-rated) for up to a year at +300C. 8051, 16MHz, mask ROM, 256B RAM, $877 (q.1) at Digikey:

    https://www.digikey.com/product-detail/en/honeywell-aerospace/HT83C51/342-1095-ND/2046731

    That said, I vote with Winter Yu: You need a sensor that goes up to +300C (kitchen oven thermocouple, e.g.) but the MCU and the SSRs can be at a safe distance. Except for the Ethernet, the logic you've described requires only a fairly modest MCU.

  • 0 in reply to Bruce McKenney47378
    Expert 1295 points

    Hi Bruce,

    Many thanks for your suggestions. HT83C51 is quite heatingproof. I hope I have opportunities to put it in a boiled hot water:p

    Indeed, I should make the wires of RTD and AC load longer to have a safe distance for MCU and SSR. It is found that MSP430FR235x has not an ethernet interface after I read datasheet. Ethernet is of necessity. Would you like to recommend other MCUs?

    warm regards

    Datïan

  • 0 in reply to Datïan
    TI__Genius 12315 points

    Hi Datian,

    For ethernet, please see C2000 series. You can create a new post in C2000 forum.