Plc Architecture Block Diagram. Block diagram of plc the input module has bank of terminals for physically connecting input devices like push buttons limit switches etc. When logic high signal comes from the processor the led is on light strike to phototransistor.
It has three major units sections. The fig shown the block and circuit diagram of output module. The cpu processor also exchanges data with the program and data memory.
The role of an input module is to translate.
The plc has following basic sections are processor section cpu the processor section is brain of plc which consists of ram rom logic solver and user memory. It has three major units sections. The input section converts the field signals supplied by input devices sensors to logic level signals that the plc s cpu can read. The cpu processor also exchanges data with the program and data memory.
