PLC Programmable Logic Controller It is a special computer that is program to serve process in industries Like petroleum , steel, energy , petrochemicals , automations. PLC comes as a replacement of Classic control PLC hardware Component S7-300 RACK 1- PS SIEMENS POWER SUPPLY (Optional for S7-300/ S7-400 must use siemens PS) 2- CPU 3- IM Interface module 4:11 (SM , FM or CP) S7-300 UP TO 4 RACKS (32 MODULES) SM Signal Modules DI Switches 0,1 DO Relays, Contactors 0,1 DI/DO AI Transmitters 4:20mA mostly AO Control valve control 4:20mA mostly AI/AO FM Function Module There is some devices like encoders, flow sensors, weigh sensors need special intelligent modules to deal wi...
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