Author: dosupply

PanelView vs VersaView

VersaView and PanelView are Allen-Bradley operator interfaces from Rockwell Automation, with similar functionalities as Human-Machine Interfaces (HMIs). These graphic operator terminals combine HMI software and hardware to allow users to interact with a controller and the system being controlled. An HMI terminal can vary from a physical control panel with indicator lights and keypad buttons…

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Sinking vs Sourcing in PLCs

In general, the concept of Sourcing and Sinking details a current flow relation between input and output devices of a control system and their power supply. This concept is based on the basic electrical theory, which states that; to complete an electrical circuit, the conventional current should flow from the DC+ terminal through a load…

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Allen Bradley VFDs vs ABB VFDs

What Are VFDs?  The term VFD stands for Variable Frequency Drive. It is a type of motor controller which drives an electric motor by varying the frequency and voltage supplied to that motor. Variable Frequency Drives (VFDs) are also known as AC Drives, Inverters, Variable/Adjustable Speed Drives, Inverters, Variable-Voltage Drives, Microdrives, Frequency Converters, or Variable…

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MPL vs VPL Servo Motors

MPL Servo Motors Overview  MPL servo motors are a family of MP-Series™ low-inertia rotary servo motors, from Rockwell Automation under Allen-Bradley Bulletin MPL. They are compact and highly dynamic brushless servo motors consisting of premium permanent magnets. They feature multi-turn or single-turn high resolution encoders, and they are available with 24 Volts DC brakes. The…

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PowerFlex 4M vs PowerFlex 4

Overview of PowerFlex 4  The Allen-Bradley PowerFlex 4 is a series of compact Variable Frequency Drives (VFDs), which provide powerful and precise motor speed control. These drives are programmed for Volts-per-Hertz (V/Hz) operation mode, as the default motor control setting. They are designed for ease of use and optimal flexibility, with a space-saving design. In…

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