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

Wally, thanks for the input. I won't be converting step pulses, just
the digital I/O signals from CNCPro for simple on/off signals into
the PLC. Nothing high speed. So should be OK.






--- In CAD_CAM_EDM_DRO@yahoogroups.com, "cnc_4_me" <cnc4me@g...>
wrote:

>
> Better be real carefull when buying those opto22 modules...I have

not

> bought them in years but at the time i do not think any module was
> available that would allow any pulse train of even medium
> speed....Reason is all inputs on opto22 had a noise filter on
> them...You need to see the full specs for the modules to find out

if

> it will work for you...
>
> Wally
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "dlpolan" <dpolan@c...>

wrote:

> >
> > Thanks Roger...I'll pick up the Opto22 relays.
> >
> > Dave
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "vrsculptor"
> > <vrsculptor@h...> wrote:
> > >
> > > Use opto22 relays <http://cgi.ebay.com/ws/eBayISAPI.dll?
> > > ViewItem&item=3868765917>. Threy are optically isolated to
> protect
> > > computer and will trigger at low (3.5) volt levels found on

some

> > > computers parallel ports. They are very common and you should

be

> > > able to find them locally.
> > >
> > > Roger
> > >
> > > In CAD_CAM_EDM_DRO@yahoogroups.com, "dlpolan" <dpolan@c...>

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?
> > > >
> > > > Thanks.