RS485 For Hypertherms

thefabricator03 wrote: Rod,

What do you mean by a converter?

I kind of wondered the same, since it looks to me like you're using an RS-232 card with a DB-9 breakout board... ? Or maybe I missed something?

But alas, I did search RS-232 to RS-485 converter, and they do exist, and if nothing else, they come with a DB-9 breakout board that looks similar to the one you had used.

It may help to know what pins on a DB9 your breakout board corresponds to in your diagram. I think I tried about every wire combo I could think of though.

On Friday I will have a bit of time in the workshop so I will map the pin out of the DB9 plug and double check the model number of my PCI card.

I do remember having a freezing issue but I think it was when I was using the USB to RS485 converter. I probably should of taken notes when doing the testing :whistle:

thefabricator03 wrote: On Friday I will have a bit of time in the workshop so I will map the pin out of the DB9 plug and double check the model number of my PCI card.

I do remember having a freezing issue but I think it was when I was using the USB to RS485 converter. I probably should of taken notes when doing the testing :whistle:

Sounds good, thank you. That works out, the converter isnt supposed to be here until Friday, so that's when I'll get back to testing.

In full disclosure I just got a cheap PCIe card, so in the end, that could be a problem as well.

No eBay APP ID and/or Cert ID defined in Kunena configuration

thefabricator03 wrote: Rod,

What do you mean by a converter?

Something like this


I assumed you had something similar that was part of your original USB version.

No eBay APP ID and/or Cert ID defined in Kunena configuration

rodw wrote:

thefabricator03 wrote: Rod,

What do you mean by a converter?

Something like this


I assumed you had something similar that was part of your original USB version.

That's almost exactly what I ordered! Only mine had 5 terminals to handle Full duplex RS-485. It seems that one you linked was only half duplex RS-485. I am still a bit miffed though, as thefabricator03 doesnt picture a converter in any of his pictures, and I was confused how a RS-232 card would work from the beginning. It could be my card is just garbage as well.

He said hopefully he can pin it out on Friday, which is around the time my converter gets here, so hopefully I can get to the bottom of this

I think Stefan the fabricator started with this USB interface but found it was not reliable.
www.jaycar.com.au/usb-port-to-rs-485-422...signal-rate/p/XC4136

I think then he bought a RS232 card for his PC and used the RS485 side from the converter above.

I've attached the Hypertherm docs which included the wiring diagram.

Serial comms Is pretty simple really. Transmit (TX) on one machine connects to Receive (RX) on the other machine.