Relay Controllers Vs PLC Controllers – An Insight into their Circuitry

For more, please read our publication 'Electro-Pneumatics and Automation' Electro-pneumatics and Automation The basic concepts of a relay control system and a PLC control system are highlighted in this article with the help of a circuit diagram. Assume that an electro-pneumatic system is used for obtaining an industrial work operation. The system consists of a... Continue Reading →

How to Develop Multiple-actuator Pneumatic Circuits Using the Cascade Method?

Most of the practical pneumatic systems involve the use of multiple actuators (cylinders, semi-rotary actuators, etc) which when operating in specified sequences carry out the desired control tasks. Double-pilot directional control (DC) valves are used as final control elements to control the forward and return strokes of the actuators. Sensors are used for confirming the... Continue Reading →

Relay-based Electro-hydraulic Systems

In the electrical actuation of a hydraulic valve, the necessary actuating force is obtained electrically with the help of a solenoid. The off-centre core of the solenoid coil is pulled towards the centre of the coil when the electric current is passed through it. This discrete movement of the core is used to actuate the... Continue Reading →

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