Emerson Launches PACSystems™ RX3i CPS400: A New SIL2 Safety Controller for Modern Industrial Protection

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Dec 06, 2025

A New Generation of Safety Control for Critical Applications
Emerson has introduced the PACSystems™ RX3i CPS400 Safety Controller, a powerful SIL2-certified solution designed for infrastructure, fire and gas systems, burner management, and other emergency shutdown applications. The new controller provides a compact but high-performance platform built to support the growing demands of modern automation environments.
With increasing project complexity and stronger safety regulations worldwide, OEMs and system integrators need reliable hardware that keeps workers safe and processes stable. The CPS400 responds to this need with advanced processing capabilities, strong industrial connectivity, and built-in protection mechanisms. It is also well-suited for users managing industrial automation parts and planning long-term spare parts management strategies.

High Performance and Scalable Architecture
The PACSystems RX3i CPS400 features a generous 64 MB memory capacity and supports up to 2,000 I/O points, allowing the system to scale easily as project requirements evolve. Its digital architecture is tailored for mission-critical applications where fast response and dependable operation are essential.
Built-in support for OPC UA, Modbus TCP, and Ethernet Global Data (EGD) allows seamless peer-to-peer communication and efficient integration with upper-level systems. This simplifies data sharing and enhances visibility across the entire operation, especially useful for facilities that rely on various industrial spare parts and multi-vendor automation components.

Secure-by-Design Features for Strong System Integrity
Security remains a priority in modern industrial control. The CPS400 incorporates Secure Boot® and Trusted Platform Module (TPM) technologies to verify firmware integrity and protect the controller against cybersecurity threats. Its safety-certified function blocks and pre-designed templates help users meet IEC 61511 requirements more easily, reducing engineering time and simplifying system certification.
These features make the controller a safe and reliable choice for companies managing critical automation assets or industrial automation parts that play key roles in overall plant performance.

Flexible Configuration: Simplex or Redundant
The RX3i CPS400 can be deployed in either simplex or redundant controller configurations. It supports duplex safety data messaging using the black channel principle over EGD, ensuring reliable and standardized communication with the PACSystems VersaMax™ SafetyNet I/O system.
Certified to IEC 61508, the controller provides a complete SIL2 safety platform, making it easier for engineers to design proper protection layers across diverse industrial processes.

Streamlined Engineering with PAC Machine Edition
Developers can configure the CPS400 using Emerson's PAC Machine Edition—an integrated environment for PLC programming, HMI development, and other automation tasks. This unified toolchain helps engineers build automation, visualization, and safety solutions more efficiently.
The familiar interface shortens learning time and accelerates project startup, especially beneficial for teams responsible for maintaining industrial spare parts or upgrading legacy equipment in their spare parts management workflow.

Conclusion
Emerson’s PACSystems RX3i CPS400 Safety Controller offers a strong mix of scalability, secure-by-design architecture, and compliance with global safety standards. Designed for environments that prioritize operational safety and reliability, it fits seamlessly into modern industrial systems that depend on effective spare parts management, high-quality industrial spare parts, and advanced industrial automation parts.

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Emerson Launches PACSystems™ RX3i CPS400: A New SIL2 Safety Controller for Modern Industrial Protection