Plc Internal Circuit Diagram. In this circuit the lamp will remain lit so long as any of the pushbuttons remain unactuated unpressed. Each input channel has its own optocoupler writing to its own unique memory register bit inside the plc s memory.
Each input channel has its own optocoupler writing to its own unique memory register bit inside the plc s memory. It will be represented with an examine off bit. Circuit diagram of plc input module.
The circuits will show on the picture below.
It might be tracks on a printed circuit board or wires in a ribbon cable. Note that in the plc circuit in figure 2 the internal representation of contacts provides the equivalent power logic as a hardwired circuit when the referenced input field device closes or is pushed. It might be tracks on a printed circuit board or wires in a ribbon cable. It will be represented with an examine off bit.
