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

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.