Types of Digital inputs in plc?
* What are the types of compound keys? What are the features
Knobs or push-button industrial keys Buttons are push-button industrial switches that are used to start and disconnect various equipment, and due to their function in different types of start-step, emergency disconnection are used for specific functions. Push buttons are available in the following two types: START or NO push button: It is connected by pressing the equipment key button. STOP or NC push button: Disconnected by pressing the equipment key.
The switch selector is an electromechanical device that can manually switch on and off electrical current in a circuit. This component is sometimes used in step voltage sources to select different voltages for the output. Selector switches are switches that are designed to select different positions, such as a three-phase two-phase rotary switch that is used to start three-phase motors left and right in a triangular star orbit. This type of selector switch is used to open and close contacts manually and is available in fixed, spring and keyed return types. Meaning L01-21.
Simple lever switch (blade) is one of the simplest types of industrial switches. In the lever switch, card-shaped blades are mounted on the drive shaft. The rotation of the shaft by the lever connects the card-shaped blades to the fixed contacts. The lever switch is mostly used to separate low current circuits. In industry, it is often called a knife key or a knife key. To insert the card fuses and also to remove it, use a device called fuse cache.
A switcher is a switch that controls the operation of a circuit by rotating it. This key consists of a shaft and contact arms, and the contacts change position by rotating the key shaft clockwise or counterclockwise. These switches can be used in DC and AC currents and are produced and supplied in various applications. The three-phase rotary switch of the star and triangle modes is a type of selector switch by which the motor can be started first in the star mode, then put it in the triangle mode so that the motor works in the triangle mode. The rotary switch has different types of three modes, four modes and five modes.
These keys are made in the form of one bridge, two bridges, three bridges, etc. - Simple keys are divided into two categories, instantaneous and permanent. Types of instant keys of the first category are used in building electricity, such as news alarm knobs, second category are used in industrial electricity, such as step start knobs. Types of permanent manual keys of the first category are used in building electricity, such as single bridge, double bridge, crossover and The second three-phase is used in industrial electricity, such as the switch sector.
