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.

Condition Monitoring
Condition Monitoring
HMI & PLC Cables & Connectors
HMI & PLC Cables & Connectors
HMI Accessories
HMI Accessories
HMI Displays
HMI Displays
IPC - Industrial Computers
IPC - Industrial Computers
IPC Accessories
IPC Accessories
IoT Gateways
IoT Gateways
PLC Accessories
PLC Accessories
PLC Expansion Modules
PLC Expansion Modules
PLC IO Modules
PLC IO Modules
PLC Power Supplies
PLC Power Supplies
PLC Racks & Enclosures
PLC Racks & Enclosures
PLC Software
PLC Software
PLCs - Programmable Logic Controllers
PLCs - Programmable Logic Controllers
Safety Automation Controllers
Safety Automation Controllers

8970 Products showing for PLCs, HMIs & Industrial Computing

1 of 449
Currently unavailable
Siemens S7-300 Series Mounting Rail for Use with SIMATIC S7-300 Series
  • RS Stock No. 453-2567
  • Mfr. Part No. 6ES7390-1AF30-0AA0
Subtotal (1 unit)
TWD3,638.00(exc. GST)
TWD3,638.00/unit
In Stock
Hilscher netTAP 151 Gateway Server
  • RS Stock No. 162-187
  • Mfr. Part No. NT 151-RE-RE
Subtotal (1 unit)
TWD29,091.00(exc. GST)
TWD29,091.00/unit
Limited stock
Siemens PLC I/O Module SM 1234 Analogue 24V dc
  • RS Stock No. 787-7986
  • Mfr. Part No. 6ES7234-4HE32-0XB0
Subtotal (1 unit)
TWD21,237.00(exc. GST)
TWD21,237.00/unit
In Stock
Eaton EasyE4 Series Logic Module, Relay Output, 4-Input, Digital Input
  • RS Stock No. 181-9083
  • Mfr. Part No. 197217 EASY-E4-UC-8RE1
Subtotal (1 unit)
TWD2,972.00(exc. GST)
TWD2,972.00/unit
In Stock
Omron CJ1W Series PLC I/O Module for Use with CJ Series
  • RS Stock No. 145-920
  • Mfr. Part No. CJ1W-PRM21
Subtotal (1 unit)
TWD100,085.00(exc. GST)
TWD100,085.00/unit
In Stock
Siemens PLC I/O Module M241 Digital 28.8V
  • RS Stock No. 787-7949
  • Mfr. Part No. 6ES7222-1BF32-0XB0
Subtotal (1 unit)
TWD7,607.00(exc. GST)
TWD7,607.00/unit
In Stock
Siemens 3RX950 Series PLC Power Supply for Use with AS-I Power Supply Unit
  • RS Stock No. 746-6104
  • Mfr. Part No. 3RX9501-0BA00
Subtotal (1 unit)
TWD22,174.00(exc. GST)
TWD22,174.00/unit
In Stock
Mitsubishi Electric GOT2000 Series PLC Programming Software for Use with GT27 Series, GT25 Series, GOT Series Mobile
  • RS Stock No. 122-2766
  • Mfr. Part No. GT25-WEBSKEY-1
Subtotal (1 unit)
TWD1,847.00(exc. GST)
TWD1,847.00/unit
In Stock
Siemens System power supply Series PLC Power Supply for Use with SIMATIC S7-1500
  • RS Stock No. 203-2783
  • Mfr. Part No. 6ES7505-0KA00-0AB0
Subtotal (1 unit)
TWD12,231.00(exc. GST)
TWD12,231.00/unit
In Stock
Siemens SIMATIC Series Power Supply for Use with Field PG M5 and M6
  • RS Stock No. 256-7190
  • Mfr. Part No. 6ES77980GA050XA0
Subtotal (1 unit)
TWD5,003.00(exc. GST)
TWD5,003.00/unit
In Stock
Schneider Electric PLC I/O Module Modicon TM Current, Voltage
  • RS Stock No. 806-7039
  • Mfr. Part No. TM3AI8G
Subtotal (1 unit)
TWD11,873.00(exc. GST)
TWD11,873.00/unit
In Stock
Hilscher netTAP 50 1 Port Gateway Server, RS422, RS232, RS485
  • RS Stock No. 162-191
  • Mfr. Part No. NT 50-CC-EN
Subtotal (1 unit)
TWD14,918.00(exc. GST)
TWD14,918.00/unit
In Stock
Eaton easyE4 Series Control Relay, Relay Output, 8-Input, Digital Input
  • RS Stock No. 272-1424
  • Mfr. Part No. 199785 RTD-BOX-E4-UC1
Subtotal (1 unit)
TWD23,530.00(exc. GST)
TWD23,530.00/unit
In Stock
Siemens PLC I/O Module SM 1231 Analogue
  • RS Stock No. 810-4141
  • Mfr. Part No. 6ES7231-5PF32-0XB0
Subtotal (1 unit)
TWD27,933.00(exc. GST)
TWD27,933.00/unit
In Stock
Schneider Electric PLC I/O Module Modicon TM Analogue
  • RS Stock No. 806-6897
  • Mfr. Part No. TMC2SL1
Subtotal (1 unit)
TWD3,861.00(exc. GST)
TWD3,861.00/unit
In Stock
Schneider Electric PLC I/O Module AFPX Voltage, Current 28.8V
  • RS Stock No. 806-7042
  • Mfr. Part No. TM3AM6
Subtotal (1 unit)
TWD13,499.00(exc. GST)
TWD13,499.00/unit
Stocked by manufacturer
Siemens SIMATIC Series Labelling Sheet for Use with 2 AUX Terminals
  • RS Stock No. 203-2796
  • Mfr. Part No. 6ES7193-6CP85-2AC0
Subtotal (1 unit)
TWD77.00(exc. GST)
TWD77.00/unit
In Stock
Siemens Memory Card Memory Card For Use With HMI MP 277, C7-635, TP/OP 177B, MP 177, TP/OP 277, Mobile Panel 177, Mobile
  • RS Stock No. 746-5549
  • Mfr. Part No. 6AV6671-1CB00-0AX2
Subtotal (1 unit)
TWD6,640.00(exc. GST)
TWD6,640.00/unit
In Stock
WAGO PLC I/O Module CJ Digital
  • RS Stock No. 508-3909
  • Mfr. Part No. 750504
Subtotal (1 unit)
TWD2,680.00(exc. GST)
TWD2,680.00/unit
In Stock
B&R X20 Series Bus Connector for Use with X20 system
  • RS Stock No. 566-451
  • Mfr. Part No. X20BT9100
Subtotal (1 unit)
TWD4,444.00(exc. GST)
TWD4,444.00/unit
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