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

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.