[GreenKeys] DB-25 Connect pin outs for current loop

[David Christ]

RS-232 and DB-25 are two different things.  RS-232 defines the electrical specifications and does not define the physical connector which can be DB-25, DB-9, RJ-35 or even a phone plug with tip-ring-sleeve.  There are conventions for each of them but can be violated.  Also don't forget that there is DCE and DTE.

As for DB-25 IBM for years used a DB-25 connector for parallel printer interfaces.  I know of no convention that is used for anything else.

David K0LUM

On Feb 12, 2014, at 9:18 PM, Jim Haynes wrote:

> I don't think you'll find anything is standard.  When the DB-25 is
> used in connection with RS-232 the pinouts are specified, but I don't
> believe there is any standard for non-RS-232 usage.  So depends on
> what equipment you are talking about.
> 
> 
> jhhaynes at earthlink dot net
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