Electro-mechanical control memory, commonly called Sequence Control Mechanic, abbreviated as SCM, is a control circuit or electrical control system based on mechanical electrical equipment (switches, buttons, relays, contactors, timers, etc.) to operate controlled machines according to a predetermined sequence. In the industrial/manufacturing world, the use of SCM is often referred to as conventional control circuits and is usually used to control electric motors or other controls. Based on the operation and components, the control system is divided into 3 types namely;
1. Manual System
Man Power is responsible for all existing control systems starting from running the engine, changing the engine speed, changing the direction of rotation, and stopping the engine.
2. Semi Automatic System
Starting or turning off the machine is done by Man Power. After the machine is started, the next process depends on the predetermined control circuit.
3. Automatic System
All basic control functions starting from starting and stopping the engine are carried out by the control circuit itself. Like a feeding machine that automatically turns on when there is no workpiece in the object sensor.
Sequence Control Mechanic (SCM) is still quite widely used and is still on the axis today, but behind that this system has several advantages and disadvantages, including;
Excess;
Cheaper manufacturing costs.
Components are easy to find.
several unit control circuits in electro-mechanical SCM: 1. on and off, 2. self holding, 3. interlocking, 4. priority circuit, 5. control circuit uses a relay timer, while the main unit uses a 1-phase or 3-phase AC signal to forward / reverse control load as well as star and delta .
1. Manual System
Man Power is responsible for all existing control systems starting from running the engine, changing the engine speed, changing the direction of rotation, and stopping the engine.
2. Semi Automatic System
Starting or turning off the machine is done by Man Power. After the machine is started, the next process depends on the predetermined control circuit.
3. Automatic System
All basic control functions starting from starting and stopping the engine are carried out by the control circuit itself. Like a feeding machine that automatically turns on when there is no workpiece in the object sensor.
Sequence Control Mechanic (SCM) is still quite widely used and is still on the axis today, but behind that this system has several advantages and disadvantages, including;
Excess;
Cheaper manufacturing costs.
Components are easy to find.
several unit control circuits in electro-mechanical SCM: 1. on and off, 2. self holding, 3. interlocking, 4. priority circuit, 5. control circuit uses a relay timer, while the main unit uses a 1-phase or 3-phase AC signal to forward / reverse control load as well as star and delta .
