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Interface PIC with PLC inputs

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igeorge

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I need to interface 5 volts output from a pic to 24 volts input to a PLC
Also , the PLC has NPN inputs or PNP inputs
It means that the common can be 24vdc or ground
I need help
Thank you
 

use BC557 and Rb=4.7K,Rc=5.6K.
VCC= 24V. VEE=0

try this BC557 use as switch and it trigger by PIC controller.
 

jaysenghani said:
use BC557 and Rb=4.7K,Rc=5.6K.
VCC= 24V. VEE=0

try this BC557 use as switch and it trigger by PIC controller.
Click to expand...
Thank for answer
This will solve the PNP part but what to do with the NPN
As i explained, some PLC are PNP input and some are NPN input
Do i ask too much if you have a short schematic to post ?
Just asking because i am really new at this and my assignment is due soon
The goal was to build a circuit which can interface with a PLC as universal device
4 wires
Plus 24
NPN output
PNP output
Ground

Thank you
 

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