A modular control system comprises a power supply, CPU, input/output modules, and an operator interface device. Modular controllers contain up to three input/output modules, including programmable logic controllers (PLCs), distributed I/O systems, actuators, or sensors, each used in various combinations depending on their intended purpose. SLC 500 Power Supply is made for Pollution Level 2 Industrial use in situations that have overvoltage Category II levels (as defined in IEC publication 60664-1). Up to 2,000 meters (6,561 feet), this equipment can still be classified as an industrial-grade Class A, Group 1 machine. This means that although there are occasional issues with EMC(electromagnetic compatibility) when using it in other environments, these complications can easily be avoided when the right precautions are taken. It is also supplied as an open type device. Anyhow, the user must use it with proper housing according to its environment. Allen Bradley PLC SLC 500 1746-HSRV Each...
A contactor is an electrically controlled electromechanical switch, similar to a relay, whose function is to break or make the electrical connection between a connected load and the main power supply. Contactors are used to switch currents ON and OFF in circuits, where the switched current is at a much higher level than the supply current. For example, a 24 Volts electromagnetic coil in a contactor can be used to control a 230 Volts electric motor switch. Applications of contactors include controlling AC and DC electric motors, heating and lighting circuits, thermal evaporators, capacitor banks, automated industrial equipment, and other assorted electrical loads, but without providing protection against overload conditions. They are typically used to control electrical equipment requiring to be turned on and off frequently, such as heaters, lights, and motors. For example, contactors are often used to provide centralized control of extensive lighting installations in retail and office...
The electronic device that captures and regulates the electrical energy sent to the motor is known as a drive. The drive modifies the amount and frequency of energy fed to the motor, which indirectly controls the motor’s speed and torque. Based on the voltage type, the two main categories of drives are; AC drives and DC drives. DC drive is one of the most reliable, efficient, inexpensive, user-friendly, and easy technology to implement. They also have many advantages over AC drives especially for regenerative and higher power applications. They have many industrial uses as they can give us very precise control. While in some applications we can see VFDs and AC drives as an alternative, in applications like cranes, hoists, elevators, spindle drives, winders, paper manufacturing machines, crushers, etc., we still have to use them. Allen Bradley 20F11FD2P1AA0NNNNN PowerFlex 753 Drive DC drive is a speed control system that gives the motor the potential difference to operating it at a...
In industry, servo motors provide precise position and speed control to assist various machine control operations. Industrial servos are mainly alternating current (AC) servos that control AC motors. The manufacturing and process industries are becoming fully automated, limiting human intervention in most tasks, thus increasing efficiency, safety, and quality. Mitsubishi’s AC Servo Systems (MELSERVO) has fulfilled industries’ demands for years by providing complete servo solutions. MELSERVO provides three types of control operations: position, speed, and torque corresponding to applications in warehouse management, spin coaters for the semiconductor industry, and industrial printers, respectively. The AC servos configuration comprises three devices; the servo amplifier, the servo motor, and the controller (exceptions exist). The servo amplifier works as the control unit, the servo motor acts as the drive unit, and the controller functions as the command unit. The controller provides...
Allen Bradley MicroLogix 1200 PLC PLCs are programmable controllers that are specially designed for applications in the industry. Before the advent of PLC, the industrial control system was a relay contractor system. However, these relay systems had many disadvantages, such as complicated wiring, longer durations for designing and production, problematic maintenance, fewer functionalities, and a variety of adaptations difficulties. PLCs use programmable storage for storing the instruction set of logic, timings, counting, and mathematical operations. They act as a controller in the industrial PC, adapted for control or production operations like assembly lines, fault diagnosis, robotic applications, and the ones which required great precision. There are many industrial component producers who are designing and manufacturing PLCs globally, and because of that, there is intense marketing competition. Two of the big names in this regard are Allen Bradley and Omron. We will be seeing the...
A Variable Frequency Drive(VFD) is a power conversion electronic device used to control the speed of an AC induction motor, by converting a fixed frequency, fixed AC supply voltage to a variable frequency AC voltage input to the motor. And since the frequency is directly proportional to RPM (Revolutions per Minute), the RPM speed of the AC induction motor can be controlled by regulating the frequency and voltage of its input power. For example, if a motor-driven process requires more speed, then the VFD will increase the frequency of the input voltage to the motor and vice versa. AC induction motors are often designed as fixed frequency electrical devices, operating at 60 Hz (Hertz) or 50 Hz depending on the supply frequency of a given national grid. But the input frequency and voltage to a VFD-equipped AC motor can be adjusted by the VFD circuit to regulate motor speed. Before the advent of VFDs, variable motor speeds were obtained by running the motor at full speed and using...
The Variable Frequency Drive (VFD) is an electronic device used to control the speed of an AC motor, by converting the fixed frequency and fixed AC voltage being supplied to the motor into a variable AC frequency and voltage. By adjusting the motor’s input frequency and supply voltage, the VFD can control an AC motor to operate at numerous different speeds. VFDs also have the capability to control ramp-up during motor start-up and ramp-down when stopping the motor. Other alternative names for a Variable Frequency Drive include: Adjustable Frequency Drive (AFD) AC Drive Inverter Frequency Converter Frequency Inverter VFDs are the industry-standard method for controlling both the speed and torque of three-phase AC induction motors. It has always been useful to directly control the speed of AC induction motors used in industrial applications, as nearly every process that uses such motors will benefit from speed control. Not only is the process efficiency improved, but in many cases...
VFD is a motor control device used in electromechanical systems, which drives an electric motor and controls its speed and torque by changing the frequency and voltage of the power supply. The modern VFD drives are capable of integrating networks and diagnostic capabilities for better control performance and more productivity. So, we can say that the three main reasons for choosing VFDs as a controller in an application is saving energy, intelligent motor control, and reducing the peak current drawn. They are commonly used in fans, pumps, and compressors and account for 75 percent of all the drivers operating worldwide. VFDs can perform the following functions: It is a power conversion device that converts the fixed voltage and frequency to variable voltage and frequency, which can control the output of the AC motors. They are often known as speed controllers of the motor. These variable frequency drivers can also control the torque of the motor and keep it constant by maintaining the...
The RX3i CPU series has only one standalone CPU (IC695CPE400 ). It functions independently, unlike other models which are usually plugged into a backplane. Two mounting possibilities are facilitated; mount on a DIN rail or install in a cabinet. The CPE400 is the latest and most advanced CPU with unmatched processing power, performance, and features. It has a quad-core 1.2 GHz AMD G-Series processor. The operating system in this CPU is VxWorks, similar to all other CPU variants. This CPU operates in a temperature range from -40°C to 70°C, unlike all others having a 0°C to 60°C operating temperature range. CPE400 has battery-backed 64 Mbytes of RAM and a similar capacity non-volatile flash memory. CPE400 has built-in non-switched and four switched RJ45 Ethernet ports. Additionally, it has an Embedded Field Agent (EFA) RJ45 Ethernet connector, the specialty of CPE400 alone. In contrast, all other CPU models support high-speed PCI and Serial module backplanes for data transfer. A user can...
The 90-30 series of programmable logic controllers (PLCs) by General Electric (GE) was launched in 1991. This series has been serving automation control requirements of the industry for many years. This series provided flexibility and modularity, making it the primary choice for field professionals. In comparison, the RX3i is a programmable automation controller system, abbreviated as PACSystem, a new and upgraded series of automation controllers that provides a shift towards a more holistic vision of automation. This series is founded on the core abilities of the 90-30 series while providing even further sophisticated capabilities and versatility. Emerson has acquired Intelligent Platforms (Automation Control Systems) from GE which these automation controllers are part. The 90-30 series offers 10 CPU models for standard and high performances applications. The number of discrete I/O ranges from 160 to 4096, the total number of Analog I/O ranges from 62 In/32 Out up to 2048 In/ 512...
Allen Bradley TLY & TL Servo Motor TL-A220P-HJ32AA For applications where precision, accuracy, and control of rotation are required, servo motors have been used for a long. Servo motors are those kinds of electromechanical tools that have provided the convenience of feedback based on which the user can monitor the movement of the motor degree by degree. According to the user’s application, different servo motors are available: continuous rotation, linear rotation, and positional rotation servo motors. TL series servo motors are low inertia servo motors, which means they can control the load’s velocity very well and help control the load’s acceleration and deceleration. The low inertia feature in these servo motors helps them to preserve their state of uniform motion or state of rest longer. These types of servo motors come with different types of frame sizes. The frames are of metric and NEMA standards to make mounting of these motors easy and compact according to the desired...
The term HVAC is an acronym that stands for Heating, Ventilation, and Air Conditioning; it broadly describes systems that provide heating and cooling to commercial and residential buildings for environmental comfort. A typical HVAC system includes Heating equipment, Ventilation equipment, and Air-Conditioning or Cooling equipment; the functions of these three elements are interrelated, particularly when providing thermal comfort and acceptable indoor air quality. For example, the Heating element, which may be a boiler or furnace, includes a piping system for the heat-carrying fluid or ductwork in case of a forced air system. The Ventilation element (either natural or forced) uses fresh outdoor air to provide high-quality indoor air through a process called ventilation–a process of exchanging or replacing air within a designated space. This process also involves the removal of dust and smoke particles, moisture, airborne bacteria, heat, odors, carbon dioxide, and other unwanted gases...
A typical Metal Oxide Varistor (MOV) is generally made of a combination of Zinc Oxide and other types of metal oxides such as Cobalt, Bismuth, and Manganese oxides. The metal oxide substance is arranged between two metal electrodes or plates with no polarity (no positive or negative sides) to interact with each other; so, the two leads of the MOV can be connected in any direction since they conduct electric current in both directions. The Zinc Oxide arrangement gives the MOV similar Volt-Ampere characteristics (V-I characteristics) as a Zener diode. Such that when a moderate or small voltage is supplied across the MOV’s electrodes, only a small amount of current will flow through due to the high resistance of the MOV. If a large voltage is applied across the MOV, its resistance value will decrease significantly and a large amount of current will flow through it. If the flowing current rises to a particular point, known as the breaker point (break over voltage), the zinc oxide...
The PowerFlex Human Interface Modules (HIMs) are used for configuring and monitoring of PowerFlex AC drives and their attached peripherals. These HIMs are available with most PowerFlex drives and come with a high-definition LCD. They support several languages and give practical explanations of parameters and events, so you don’t have to look through a handbook for specifics. This article discusses HIM’s features, types, components, and compatibility with AC drives. This information will help you to choose a suitable HIM for your application. HIMs are categorized into following categories. Allen Bradley 20-HIM-A3 Basic PowerFlex 7-Class HIMs: 20-HIM-A3 and 20-HIM-A5 are basic PowerFlex 7-class HIMs. 20-HIM-A3 is an LCD operator interface that is compatible with PowerFlex 70, 700, 700H, 700S, and 700L AC drives. This basic HIM features a liquid crystal display along with a full numeric keypad as an operator interface. You can either use this HIM as a hand-held device or mount it...
The term HIM stands for Human Interface Module. It’s basically a user interface that enables human operators to engage and interact with a drive, machine, or a system. HIMs are commonly used in the industrial context, and you’ll often come across them in industrial environments alongside AC drives or Variable Frequency Drives (VFDs). They allow factory operators to start and stop process cycles, adjust operating set points, and perform other necessary functions required to control and interact with industrial drives. HIMs are also software-based, so they replace physical and hard-wired controls with software control parameters, allowing easier adjustment of drive operating parameters. Thus, with a HIM you can upload individual sets of parameters for your host drive and any other peripherals connected into the HIM. Other functions include: Accepting input data obtained from human operators Processing the input data Data logging Real-time information display of the operating conditions...