input/output types of PMC

[sinha_nsit]

Are only source/sink type digital inputs and source type outputs are available on PMC?

[Al_The_Man]

I am not sure if all systems have the same option, but sink or source input is usually available, and the outputs are typically FET transistor 24-48 250mA variety.
The FET sinks to ground or common.
Outputs cards can have the FET with own individual common or grouped in fours or eights etc.
The other option is the PLC style rack expansion with assorted I/O configuration, relay etc.
Al.

[sinha_nsit]

Originally Posted by Al_The_Man The FET sinks to ground or common. Al.

I am not an electronics man, so I could not understand its meaning.

I believe, "drain" is internally connected to +24 V, and "source" to DO terminal. Am I correct, or it is other way round?

Is a MOSFET equivalent to PNP or NPN transistor?

When one tries to learn something entirely new, he tends to ask funny questions!

[Al_The_Man]

The N channel FET is similar connection to a NPN transistor where the emitter is connected to common (-).
But in this case the source is connected to common and the drain would be the load connection, the other side of the load is connected to +24vdc.
The FET is a sinking output, the load is sourced from 24vdc.
Often Fanuc depict it in the connection manuals as a NPN transistor.
Al.

[sinha_nsit]

Thanks for the reply.
A confusion:
The 0i connection manual states that "The driver of DO signals is source type (a type that supplies energy, non-insulating)"
The wiring diagram also shows +24V connected to DOCOM, and the two sides of the relay connected to output terminal (e.g., CB104, A16) and 0V, respectively.
You have said that FET is a sinking output. Does it mean that both sourcing and sinking outputs are available in different control versions?