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Controladores lógicos programables PLC baja gama expandibles entradas digitales AC 74368-SR22MRDC ARRAY Manual Ingles www.viaindustrial.com
Controladores lógicos programables PLC baja gama expandibles entradas digitales AC 74368-SR22MRDC ARRAY Manual Ingles www.viaindustrial.com
Parallel connection
Of NO contacts
OR
Phase inverter
NOT
Dual communicator
contact
XOR
Parallel connection
Of NC contacts
NAND
Parallel connection of
NC contacts with RLO
borderline test
NAND
(With RLO borderline
test)
Series connection
Of NC contacts
NOR
3.1.1 AND
Series connection of a certain In SR, the symbol of AND is
number of NO contacts in SR line as shown in follows:
diagram is as shown in follows:
This function block is called as AND, because only when all of I1, I2, I3 and I4 are all
in status 1, the status of Output Q will be 1 (i.e. the output is closed).
I1 I2 I3 I4