PACSystems™ Programmable Logic Controllers (PLCs)

Move beyond rigid PLC ecosystems with an open, secure architecture that adapts as your machines, systems, and data needs evolve.

A Control Architecture that Scales without Re-Platforming

Design, scale, and modernize automation on a single PACSystems PLC architecture that combines compact control, high-performance processing, and edge-enabled intelligence with open communications, built-in cybersecurity, and a common engineering foundation. Simply start with the control footprint your application needs today and scale performance, connectivity, and insight over time without changing platforms, retraining teams, or limiting integration options.

Choose the Control Class. Keep the Architecture.

Start with the control performance your application demands today. Scale capability, connectivity, and intelligence seamlessly within the same PACSystems architecture as needs evolve.

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COMPACT CONTROL

200-Series PLCs

Open, Secure Connectivity.

Achieve high-performance machine control in a compact footprint with 200-Series PLCs (also known as RSTi-EP) that combine open communications, built-in cybersecurity, and the same PACSystems runtime used across larger controllers. Designed for OEMs and distributed equipment, the platform simplifies integration, reduces engineering effort, and provides a scalable foundation for future connectivity and analytics.

  • User Memory: 0.5 MB to 4 MB options for application flexibility 
  • Ethernet Connectivity: Up to three 1 Gbps ports for high-speed communications
  • Protocols: OPC UA, PROFINET, Modbus/TCP, and DNP3 for open integration 
  • Cybersecurity: Achilles Level 2 certified with secure boot and TPM 
  • Programming Environment: IEC 61131 languages plus C with PACSystems common toolchain 
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SCALABLE PERFORMANCE

300-Series PLCs

Flexibility with High Throughput.

Move beyond compact control with 300-Series PLCs (also known as RX3i) that deliver higher performance and expanded system integration for more demanding applications. With high-speed modular control, expanded I/O and processing, and broad protocol support, this PLC class enables seamless integration across systems while supporting industrial internet connectivity and application portability.

  • User Memory: Up to ~64 MB for larger, data-intensive applications
  • Processing Performance: High-speed multi-core processors for faster execution and throughput
  • Ethernet Connectivity: Multiple 10/100/1000 Mbps ports for high-speed networking
  • Protocols: OPC UA, PROFINET, Modbus TCP/IP, DNP3, IEC‑61850, IEC‑104 for broad integration support
  • Scalability & Redundancy: Support for distributed I/O, PROFINET system redundancy (PNSR), and modular expansion
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EDGE-ENABLED CONTROL

400-Series PLCs

Integrated Intelligence.

Bring data, analytics, and visualization closer to where decisions are made with 400-Series PLCs (also known as CPE400, CPL410 and CPS400 Safety PLC) that combine deterministic control and PACEdge™ Software in a single platform. Designed for connected machines and distributed operations, this controller class enables local data collection, analysis, and visualization, helping teams act faster without separating control and insight.

  • User Memory: Up to ~64 MB for large, data-intensive applications
  • Processing Performance: High-speed multi-core processors for advanced control and analytics workloads 
  • Ethernet Connectivity: Multiple 1 Gbps Ethernet ports for high-speed data exchange
  • Protocols: OPC UA, PROFINET, Modbus TCP/IP, DNP3, IEC‑61850, IEC‑104 for broad system integration
  • Edge-Enabled: Support for local data collection, analysis, and visualization alongside control

Flexible I/O Options

PACSystems™ RSTi-EP I/O

Slice-Based I/O

Enable high‑density I/O at the machine or process edge with slice-based I/O (also known as RSTi-EP I/O) that simplifies expansion, reduces wiring complexity, and integrates across PACSystems architectures.

PACSystems™ RX3i I/O

Rack-Based I/O

Implement scalable, high-capacity I/O (also known as RX3i I/O) with rack‑based systems that centralize control, support extensive expansion, and integrate across complex PACSystems architectures.

Built for How Automation Actually Evolves

Get the flexibility to choose the right control capability today while preserving the freedom to scale, integrate, and modernize over time without compromise.

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Open by Design

Integrate across systems, devices, and vendors without restriction while getting support for leading industrial protocols for flexible architectures that easily evolve with changing needs.

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Defense-in-Depth

Mitigate security gaps at the control layer by protecting your control systems from day one with hardware-backed security (TPM, secure boot) and a defense-in-depth architecture.

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One Engineering Environment

Standardize development across all controller classes with a common runtime, reuse code to reduce engineering effort, and simplify commissioning and lifecycle management.

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Scalable Architecture

Start with compact control and seamlessly expand to higher performance, data-intensive applications using the same backplane--no rearchitecting the system. 

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Data-Driven Operations

Turn data into insights with the ability to connect to analytics platforms and enable local processing at the edge to support new business models for OEMs.

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No Re-Platforming Required

Protect your engineering investment by modernizing as requirements change without rewriting code, retraining teams, or replacing platforms.

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One Toolchain. Total Control.

Configure and optimize PLCs and I/O in one unified environment to streamline engineering, reduce complexity, and accelerate deployment across every PACSystems architecture.

Explore Related Automation

Ethernet Switches

Ensure secure, highly reliable network connectivity for PLCs and I/O to benefit from real-time data exchange and seamless integration across control systems.

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