Both a PLC (Programmable Logic Controller) and a PAC (Programmable Automation Controller) control machines and processes — but they suit different jobs.

PLC

A PLC is a rugged, reliable controller optimised for fast, deterministic discrete logic — starting motors, reading sensors, sequencing machines. It is cost-effective and proven for the large majority of machine-control tasks.

PAC

A PAC extends that foundation with more memory, more processing power and a single platform that handles logic, motion, process control and safety together. PACs typically use a PC-based architecture, richer programming environments and easier integration with databases and IT systems.

Which should you use?

• Choose a PLC for focused machine control, discrete logic and cost-sensitive applications.
• Choose a PAC when you need to combine motion, process and safety, handle large data sets, or integrate tightly with higher-level systems.

In practice the line between them has blurred, and the right choice depends on your application, existing equipment and team. Talk to our engineers and we’ll help you scope the right architecture.