Answer Posted / 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.

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