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Programmable Logic Controller (PLC) Industrial Applications

Programmable Logic Controller (PLC) Industrial Applications

Programmable logic controllers (PLCs) are useful in increasing production and improving overall plant efficiency. PLCs can control individual machines and link the machines together into a system. The flexibility provided by a programmable logic controller has allowed its use in many applications for manufacturing and process control. Process control has …

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Types of PLCs

Types of PLCs

The type of programmable logic controller (PLC) that is used depends upon the application, size and number of loads to be controlled, need for monitoring and reprogramming the circuit, and amount of control required (ON/OFF to anywhere in between). Budget cost and the knowledge level of personnel who will need …

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AC Motor Braking Methods

Electric Motor | Protection | Failure | Troubleshooting

An AC motor drive decelerates a motor at a controlled rate by placing an electric load on the motor. The advantage in using a motor drive to apply a braking force is that maintenance is kept to a minimum because there are no parts that come in contact during braking. …

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Electronic and Programmed Overloads

Electronic & Programmed Overloads

Electronic Overloads New motor starters normally include an electronic overload instead of heaters. An electronic overload is a device that has built-in circuitry to sense changes in current and temperature. An electronic overload monitors the current in the load (motor, heating elements, etc.) directly by measuring the current in the …

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Variable Frequency Drive

Variable Frequency Drive Components

AC motor drives are referred to as variable frequency drives, adjustable frequency drives, inverter drives, vector drives, direct torque control drives, and closed-loop drives. Regardless of how an AC drive is referred to, its primary function is to convert the incoming supply power to an altered voltage level and frequency …

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Digital Logic Functions | Digital Logic Gates

Control devices such as push buttons, limit switches, and pressure switches are connected into a circuit so that the circuit can function in a predetermined manner. All control circuits are basic logic functions or combinations of logic functions. Logic functions are common to all areas of industry. This includes electricity, …

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Types of Electric Motors and their Applications

three phase motor

Although there are many different types and sizes of motors, most electric motors used in commercial and industrial applications can be classified as single-phase (1 φ) or three-phase (3 φ). Single-phase motors are commonly used in some commercial applications such as garage door openers, sump pumps, automatic doors, and ceiling …

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Reversing Three Phase Induction Motors

Reversing Three Phase Induction Motors

Three phase induction Motor rotation can be reversed by changing any two of the three lines feeding power to the motor. It is common standard practice to switch line 1 and line 3. When the motor needs to be run in a clockwise and a counterclockwise rotation, a reverse starter …

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PLC Scan Cycle | PLC Programming Software

As there are many PLC manufacturers, there are as many software programming packages. Each manufacturer developed their own software with no set standards other than it must follow relay ladder logic so that technicians could easily be trained without having to be software engineers. Two terms describe PLC software; open …

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Motor Control Panel Components | Low Voltage Components

Figure 2 - Distribution Block

Low Voltage Components Low voltage components make up the other half of the motor controls panel. Voltage is reduced and distributed to different components to achieve the desired function. This is a twofold purpose: safety and power consumption. By reducing the voltage, technicians that troubleshoot a live panel are less …

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