Re: [CAD_CAM_EDM_DRO] Converting 5v parallel port signal to 12 or 24 vdc

dlpolan wrote:

>Need a little help with a project...what is the best way to convert 5
>volt signals from my parallel port to a 12 or 24 volt signals to use
>as inputs to a PLC? My PLC is an A-B SLC150 and will only accept 10-
>30 vdc inputs. I'd like to protect the computer with opto-isolation
>too. Any black boxes out there doing this?
>
>

I can recommend the Fairchild H11A817D (Available from Digi-Key under that
part #). I use it in all my interfaces now for control signals. It
might be too
slow for step pulses, but for pretty much all other signals, it should
be fine.
It has a current transfer ratio of 300% guaranteed, and can handle up to
30 V on the output. It is a 4-pin device.

Jon