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    PLCs, HMIs & Industrial Computing

    The RS range of industrial computing solutions consists of a high quality selection of PLCs, HIMs and logic modules. We offer the components you need to revolutionise and enhance your process control and automation systems, with solutions tailored for use in a range of industries to provide control of electromechanical processes and building systems. 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 control systems. 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 devices. Some key industries they are used in are:

    • Food and beverage
    • Automobile
    • Manufacturing
    • Bottling

    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.

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    PLCs - Programmable Logic Controllers
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    10140 Products showing for PLCs, HMIs & Industrial Computing

    1 of 507
    Better World
    Siemens LOGO! Series Logic Module for Use with LOGO! 8.4, 12 V dc, 24 V dc Supply, Relay Output, 8-Input, Analogue,
    • RS Stock No. 282-5512
    • Mfr. Part No. 6ED1052-1MD08-0BA2
    Each
    £134.00
    WAGO PLC CPU for Use with WAGO-I/O-SYSTEM 750 to PROFINET IO
    • RS Stock No. 868-7355
    • Mfr. Part No. 750-375
    Each
    £413.45
    Advantech Adam 6000 Series Series Ethernet Module, Digital, Digital, 30 V
    • RS Stock No. 285-7156
    • Mfr. Part No. ADAM-6051
    Each
    £197.22
    Advantech ADAM 6000 Series Relay, Digital, Analogue, 30 V
    • RS Stock No. 283-8005
    • Mfr. Part No. ADAM-6066
    Each
    £206.38
    WAGO 787 Series Power Supply, 24 VDC
    • RS Stock No. 279-4124
    • Mfr. Part No. 787-2850
    Each
    £76.63
    Siemens SIMATIC IoT Starter Kit
    • RS Stock No. 271-3553
    • Mfr. Part No. 6ES7647-0BA20-0SP2
    Each
    £305.00
    Interroll Interface Module
    • RS Stock No. 243-6414
    • Mfr. Part No. RD-MC-AI
    Each
    £505.79
    RS PRO Logic Module, 12 → 24 V dc Supply, Digital, Relay Output, 8-Input, Analogue, Digital Input
    • RS Stock No. 917-6377
    Each
    £93.34
    Better World
    Siemens SIMATIC S7-1200 Series PLC CPU for Use with SIMATIC S7-1200 Series, 20.4 → 28.8 V dc Supply, Digital,
    • RS Stock No. 862-4459
    • Mfr. Part No. 6ES7211-1AE40-0XB0
    Each
    £215.00
    Allen Bradley 1769 Series PLC I/O Module for Use with MicroLogix 1500 Series, Digital
    • RS Stock No. 698-7559
    • Mfr. Part No. 1769-OB16
    Each
    £286.44
    BARTH lococube mini-PLC Series PLC I/O Module for Use with STG-810, 7 → 32 V dc Supply, Digital, PWM, Solid
    • RS Stock No. 134-8864
    • Mfr. Part No. 0850-0810
    Each
    £140.45
    Better World
    Schneider Electric Zelio Logic 2 Series PLC CPU for Use with Zelio 2, Relay Output, 6 (Up → 6 Digital, Up
    • RS Stock No. 468-4365
    • Mfr. Part No. SR3PACKBD
    Each
    £243.53
    Revolution PI RevPi Core, Industrial Computer, 700 MHz Quad-Core, BCM2835 700 MHz, 500 MB (RAM), 4 GB (Flash), Linux
    • RS Stock No. 181-1141
    • Mfr. Part No. PR100102
    Each
    £146.69
    Advantech Adam 4000 Series Analogue Output Module, Digital, Analogue, 30 V
    • RS Stock No. 283-8000
    • Mfr. Part No. ADAM-4024
    Each
    £243.04
    Pilz PNOZ m B1 Safety Controller, 4 Safety Outputs, 24 V dc
    • RS Stock No. 191-9883
    • Mfr. Part No. 772101
    Each
    £450.77
    Better World
    Schneider Electric Modicon M340 Series PLC Power Supply for Use with Modicon M340, 240 V
    • RS Stock No. 148-032
    • Mfr. Part No. BMXCPS2010
    Each
    £242.04
    WAGO 750 Series Interface Module, RS-232, RS-422/RS-485
    • RS Stock No. 240-7939
    • Mfr. Part No. 750-652
    Each
    £342.88
    Revolution PI REVOLUTION PI Series Expansion Module for Use with RevPi
    • RS Stock No. 221-7790
    • Mfr. Part No. PR100323
    Each
    £200.46
    Schneider Electric Schneider Electric Modicon M241 Series Starter Kit
    • RS Stock No. 184-6569
    • Mfr. Part No. TM241KIT1STU655
    Each
    £558.79
    SICK UE410 Series Safety Controller, 4 Safety Inputs, 4 Safety Outputs, 24 V dc
    • RS Stock No. 285-9082
    • Mfr. Part No. UE410-MU4T5
    Each
    £312.18
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    PLCs Guide
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