Sourcing vs Sinking outputs and CE
Sourcing vs Sinking outputs and CE
(OP)
I read somewhere that CE requires that PLC output logic be PNP (or sourcing)? Is this accurate? I believe that the applicable standard is IEC 61131-4, though I don't have a copy of it





RE: Sourcing vs Sinking outputs and CE
You might try this website to get some insight on this standard - http://www.plcopen.org/
RE: Sourcing vs Sinking outputs and CE
RE: Sourcing vs Sinking outputs and CE
RE: Sourcing vs Sinking outputs and CE
Also, inputs are fail-safe when using positive (PNP) logic. A loose wire will not start anything in such a system while it can be seen as a logic one in an NPN system where inputs are closed to ground.
Gunnar Englund
www.gke.org
RE: Sourcing vs Sinking outputs and CE
RE: Sourcing vs Sinking outputs and CE
RE: Sourcing vs Sinking outputs and CE
RE: Sourcing vs Sinking outputs and CE
Are you sure about that?
And, are you in Europe or somewhere else?
Gunnar Englund
www.gke.org