Controladores logicos programables

1 CONTROLADORES LOGICOS PROGRAMABLES

2 Qué es un PLC CONTROLADOR PROGRAMABLE (Gp:) INPUTS

Programmable logic controllers, also called programmable controllers or PLCs, are solid-state members of the computer family, using integrated circuits instead of electromechanical devices to implement control functions.They are capable of storing instructions, such as sequencing, timing, counting, arithmetic, data manipulation, and communication, to control industrial machines and processes OUTPUTS (Gp:) CR

3 ELEMENTOS DE ENTRADA DIGITALES Pulsantes Switches Selectores Sensores de Posición Sensores de Nivel Sensores Fotoeléctricos Sensores de Proximidad Contactos Auxiliares de contactores Contactos de Relé Thumbwheel Switches 120 VAC 240 VAC 24 VAC/VDC TTL

4 ELEMENTOS DE SALIDA Electro válvulas Contactores para motores Solenoides Relés de Control Alarmas Displays Salidas Digitales: Relés 120 VAC/VDC 240 VAC/VDC 24 VAC/VDC

Triacs 120 VAC

Transistores 24 VDC

5 PRINCIPIO DE OPERACIÓN A programmable controller, consists of two basic sections: • the central processing unit • the input/output interface system The central processing unit (CPU) governs all PLC activities. The following three components form the CPU: • the processor • the memory system • the system power supply

6

7

8 CR Aisla- miento Aisla- miento Dentro de un PLC PROCESADOR CENTRAL MEMORIA programa datos Alto Voltaje Alto Voltaje Bajo Voltaje AC Power Supply 85-264 VAC, 50/60Hz Circuits DC Power Supply

o COMUNICACIONES Input Circuits O u t p u t