PLCs, HMI & Data Acquisition

Specifically designed for use in many industries to provide control of electromechanical processes and building systems. Our range of PLCs, HMIs and Logic Modules will revolutionise and enhance your process control system. Featuring expert brands like Siemens, Schneider Electric, Omron, and Mitsubishi.

What are PLCs and how do they work?

Programmable logic controllers (PLCs) are thought of as the digital brain of automated systems as it is a solid state device that is able to receive input signals, process, analyse and transmit output data to control a large number of devices to apply logic to tasks to ensure they perform at optimum levels.

What are HMIs?

A Human Machine Interface (HMI) allows real-time process information to be presented to a human user, to be able to control and modify the process.

What is a SCADA system?

Supervisory control and data acquisition (SCADA), is the term used to describe a full industrial control system that uses a computer system to monitor and control a process. This is where PLCs and HMIs work together. A system will usually comprise:

  • A HMI - To present data to a human operator
  • Supervisory (computer) system - To gather data sending commands
  • Remote Terminal Units (RTUs) - To connect sensors
  • PLCs - To apply logic to devices in the process
  • Communication infrastructure - To provide connectivity
  • What industries are both HMI and PLCs used in?

    All automated systems can rely on and benefit from process control devicesl. Some key industries they are used in are:

    • Food and beverage
    • Automobile
    • Manufacturing
    • Bottling

    What advantages does process control hardware deliver?

    Here are some benefits of using PLCs and HMIs over traditional wiring methods:

    • Easy to re-programme even whilst a system is running
    • Highly reliable
    • Fast issue diagnosis
    • Access to data
    • Complex logic achievable without difficult wiring
    • Utilise panel space effectively

    How do you select a PLC?

    They're usually available as a fixed configuration or in modular format. The specific model required is highly dependent on the application, the software package, the environment it will be used in and networking capabilities. There are some key points to consider such as the number of input and output points. A simple rule to follow is the larger the systems, the larger the memory, programming, and communication capabilities.

Guides & Articles

article1_image

Flow Switches Guides

In our definitive guide, we look at what flow switches are, how they work and what they’re used for, as well as the different types that are available.

article1_image

Thermocouples Guide

In our comprehensive guide we look at what thermocouples are, what they’re used for, as well as the different types that are available.

Related Products
The component is an Ethernet patch panel for ...
Description:
The component is an Ethernet patch panel for DIN rail mounting. It represents the transition of the field cabling to the internal control cabinet cabling. The connection from the patch panel to the end device is ensured with a prefabricated ...
HARTING and Bosch have combined their expertise in ...
Description:
HARTING and Bosch have combined their expertise in the first Plug & Play IoT kit for industrial applications with IP 54 protection available on the market. It allows digital condition monitoring of many sensor inputs from machinery, extremely quickly with ...
Data Station Plus is designed for industrial data ...
Description:
Data Station Plus is designed for industrial data collection and management. The unit performs protocol conversion that allows disparate devices to communicate seamlessly with one another. The protocol conversion feature converts numerous protocols simultaneously. • Model DSP - Data Station ...
Red Lion’s Industrial Unmanaged Ethernet Switches of the ...
Description:
Red Lion’s Industrial Unmanaged Ethernet Switches of the Series 100 offer powerful network performance with plug-and-play functionality.With an endless range of port options, these unmanaged switches are set to tackle the demands of industrial data acquisition, control and Ethernet I/O ...