jayesh_vardhman Member J Join Date Jul 2005 Location Surat Posts 8 May 6, 2009 #1 Uptil now I have used PLCs with digital input and relay output only for small applications. I am confused as to how to use transistor input and transistor output if PLC is for that. Please explain.
Uptil now I have used PLCs with digital input and relay output only for small applications. I am confused as to how to use transistor input and transistor output if PLC is for that. Please explain.
keithkyll Member K Join Date Jul 2005 Location Heath, TX Posts 2,033 May 6, 2009 #2 Search this forum for PNP and NPN. Transistor theory has been explained many times.
lbg_dk Member L Join Date Nov 2005 Location Jylland Posts 38 May 6, 2009 #3 jayesh_vardhman said: Uptil now I have used PLCs with digital input and relay output only for small applications. Click to expand... Ok I am confused as to how to use transistor input Click to expand... Why ? You see that digital input = transistor input. Most Plc's 0V/24V (False/True) I am confused as to how to use transistor output Click to expand... Please see in you manual first. But the PLC's i have worked on give 0V/24V (False/True) out. But renember that they maybe only can give 100mA ! If you have more questions then tell us that the module name is.
jayesh_vardhman said: Uptil now I have used PLCs with digital input and relay output only for small applications. Click to expand... Ok I am confused as to how to use transistor input Click to expand... Why ? You see that digital input = transistor input. Most Plc's 0V/24V (False/True) I am confused as to how to use transistor output Click to expand... Please see in you manual first. But the PLC's i have worked on give 0V/24V (False/True) out. But renember that they maybe only can give 100mA ! If you have more questions then tell us that the module name is.