Safety controller to help with emergency shutdown of mission-critical applications introduced by Emerson

As project automation becomes more sophisticated and data-driven, systems integrators need powerful hardware and software to comply with standards.
Oct. 10, 2025
2 min read
As project automation becomes more sophisticated and data-driven, systems integrators need powerful hardware and software to comply with standards.

Summary points:

  • PACSystems RX3i CPS400 safety controller offers security and a scalable architecture with as many as 2,000 I/O points for complex data-driven projects.
  • The safety controller meets IEC 61511 safety standards, ensuring reliable performance in safety-critical applications with SIL2 certification.
  • With built-in industrial communication protocols and the PAC Machine Edition development suite, users can configure and deploy automation, safety, and visualization solutions.

FLORHAM PARK, N.J. – The Emerson Electric Co. Discrete Automation segment in Florham Park, N.J., is introducing the PACSystems RX3i CPS400 safety controller to help with the safe emergency shutdown of infrastructure, fire and gas, and burner management systems.

The compact PACSystems safety controller offers security measures and a scalable architecture with 2,000 available I/O points for complex projects with evolving requirements.

As project automation becomes more sophisticated and data-driven, systems integrators need powerful hardware and software to comply with standards and regulations for protecting workers.

Mission-critical applications

A large 64-megabyte memory capacity and scalable digital architecture enables the PACSystems safety controller to support mission-critical applications. Using built-in industrial communications protocols, including OPC UA, Ethernet Global Data (EGD), and Modbus TCP, the RX3i CPS400 controller is ready to connect peer-to-peer and with higher-level hosts.

As a secure-by-design solution incorporating Secure Boot and the Trusted Platform Module (TPM) standard, the controller delivers data integrity and protection against potential threats. Safety-certified function blocks and pre-configured templates simplify overall system certification in accordance with the IEC 61511 standard.

Available in simplex or redundant controller configurations, the RX3i CPS400 controller can perform safety data messaging with duplex communications using the black channel principle over EGD, allowing standardized and reliable connectivity with Emerson's PACSystems VersaMax SafetyNet I/O system. The system is IEC 61508 safety-certified, providing a capable SIL2 simplified solution to help designers build appropriate protection schemes.

Software tools

Developers can configure the controller using software tools employed for programmable logic controllers (PLC), operator interfaces, and other automation elements -- namely Emerson's PAC Machine Edition development environment.

As a unified tool chain with a user-friendly interface, the PAC Machine Edition suite streamlines development efforts so users can easily create complete and integrated automation, visualization and safety solutions for rapid startups and maximum operating efficiency.

For more information contact Emerson Discrete Automation online at www.emerson.com/en-us/catalog/emerson-ic695cps400.