12
3.2 Equivalent Circuits with General and High-speed Inputs
■ Wiring for Sinking and Sourcing Inputs
24V
0V
X0
X1
X2
X3
SS0
X4
Xn
X17
SS1
…
…
……
24V
0V
User signal cable User signal cable
Signal input devices
Signal input devices
Sensor
Sensor
Equivalent circuit inside
the PLC's master module
Wiring for sink input Wiring for source input
X0
X1
X2
X3
SS0
24V
0V
X4
Xn
X17
SS1
…
…
……
24V
0V
Logic processor circuit
Logic processor circuit
Equivalent circuit inside
the PLC's master module
3.3 Equivalent Circuits with General and High-speed Output
Transistors
Y0
Yn
Yn
Y7
COM
Y10
……
……
Y15
……
……
Equivalent circuit inside the PLC
Operating power supply
of the internal logic circuit
Logic processor circuit
Output drive circuit
5 V DC
power supply