Answer / abhaynath

NO=XIC(EXAMINE IF CLOSED)
NC=XIO(EXAMINE IF OPEN)
NO IS DIRECTLY PROPORTIONAL TO INPUT LOGIC.
NC IS COMPLIMENT OF INPUT LOGIC.
i.e.
IF I/P=0 THEN LOGIC OF NO IS ALSO LOW(0).
IF I/P=1 THEN LOGIC OF NO IS ALSO HIGH(1).
ON THE OTHER HAND
IF I/P=0 THEN LOGIC OF NC IS HIGH(1).
IF I/P=1 THEN LOGIC OF NC IS LOW(0).
SINK MODULE ACCEPTS THE SIGNAL COMMING FROM THE SENSORS.
i.e.SIGNAL FLOWS FROM SENSOR TO MODULE.
SOURCE MODULE SENDS THE SIGNAL TO THE SENSORS.
i.e.SIGNAL FLOWS FROM MODULE TO SENSOR.

Answer / shalini

If the module is source +ve signal is shared, it gets -ve
from outside.

If its sink type then -ve signal is shared, it gets +ve
from the external source

If senor is source type then card shud be of sink type.
If sensor is sink then I/O card shud be source type.

Answer / mahip kaushal

this ia a basic and the most imp one too
NO MEANS NORMAL OPEN
NC MEANS NORMAL CLOSED
AS THE NAME SUGGEST NO IS A STATE 0 OR OFF IT IS BASICALLY
USED AS SWICH FOR EXAMPLE WHEN WE PUT ONN ANY ELECTRICAL
EUIPMENT LIKE BULB WE FOR THE SWITCH TO ONN POSTION I.E WE
TAKE THE SWITCH FROM 0 TO POSTION 1, FALSE TO TRUE.LIKE WISE
NC OPPOSITE TO NC INTIALLY IT IS IN HIGH STATE ,WE BASICALLY
USE NC IN PROGRAMING TO CUT SUPPLY AS WE FORCE IT FROM 1 TO
0 STATE

Answer / atul

sink means sensor to module and source means o/p module to o/p devices(like as motor,...etc)

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