PLC
B&R Industrial Automation X20 controllers PLC
Modular X20 PLC system with controllers up to Intel Atom class, POWERLINK and OPC UA over TSN on the current generation, and around 250 directly connectable I/O modules.
Key specifications
| Fieldbus | POWERLINK, Ethernet (TSN-enabled on current generation), RS232, USB; CAN optional on Compact-S |
|---|---|
| Cpu | up to Intel Atom |
| Width | 37.5 (Compact-S incl. power supply), 55 (embedded PLC) |
| Io | about 250 X20 I/O modules |
Summarised in our own words from ABB's published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1
Specify Motion is not affiliated with ABB. B&R Industrial Automation and X20 controllers are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
Alternatives that meet or exceed these figures
Engineers often come to us with a B&R Industrial Automation part number and leave with an alternative that is easier to source, quicker to deliver or a better fit for the machine. These series from our supply network is the closest match on published figures.
Kinco compact modular PLC with tool-free slice I/O expansion for space-saving automation.
View K6S →Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
What a PLC is
A PLC, or programmable logic controller, is an industrial computer that runs machine control programs, reads inputs and drives outputs in a repeating scan cycle. Programs are written in IEC 61131-3 languages such as ladder diagram, structured text and function block diagram. Modern PLCs also handle communication over fieldbus and industrial Ethernet, data logging and motion control functions. Formats range from compact bricks with built-in I/O to modular racks and industrial PCs.
When engineers choose a PLC
Choose a PLC as the main controller for machines and process systems needing reliable logic, sequencing, I/O handling and communication. It is robust, widely supported and familiar to maintenance teams. The trade-offs are motion capability and cost: entry-level PLCs offer limited axis control, so complex multi-axis motion may need a motion controller or PLC with motion libraries. Ecosystem and software licensing should be considered too.
How to specify the B&R Industrial Automation X20 controllers
Send these with your enquiry and an engineer can confirm the right X20 controllers variant or an equivalent:
- I/O count and types
- Programming languages and software
- Communication interfaces and protocols
- Motion axes, if needed
- Scan or cycle time
- Expansion and modularity
- Power supply and environment
Common mistakes to avoid
- Choosing a PLC without enough I/O or memory for growth
- Ignoring software licensing costs
- Assuming all fieldbuses are supported
- Leaving out cybersecurity for networked machines
B&R Industrial Automation X20 controllers: frequently asked questions
What is the B&R Industrial Automation X20 controllers?
Modular X20 PLC system with controllers up to Intel Atom class, POWERLINK and OPC UA over TSN on the current generation, and around 250 directly connectable I/O modules. It is made by ABB; Specify Motion can help source it or propose an equivalent.
Who makes the B&R Industrial Automation X20 controllers?
The B&R Industrial Automation X20 controllers is made by B&R Industrial Automation (ABB) and is listed here for engineers comparing options. Specify Motion is not affiliated with ABB; brand names are used only to identify the product.
Is there an alternative to the B&R Industrial Automation X20 controllers?
Yes. On published figures, Kinco K6S is the closest match from our supply network. An engineer confirms the fit against your application before recommending anything.
What is IEC 61131-3?
IEC 61131-3 is the international standard for PLC programming languages. It defines ladder diagram, function block diagram, structured text and sequential function chart, plus program organisation. Programs written to the standard are more portable between platforms, though vendor differences remain.
Can a PLC control servo motors?
Yes, many PLCs control servo drives using motion function blocks, pulse outputs or a real-time network such as EtherCAT. Simple PLCs handle a few axes, while PLCs with motion libraries handle coordinated motion. Check axis count, network support and cycle time.
Further reading: How to select a motion controller or plc · How to select an hmi and remote io · Controllers and PLCs
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