The Rockwell Automation Allen-Bradley Logix SIS is a modern, integrated safety instrumented system (SIS) built on the proven Logix control platform. It seamlessly combines process safety and basic process control (BPCS) on a single, unified architecture. Certified to SIL 2 and SIL 3 (IEC 61508, IEC 62061, ISO 13849-1), the Logix SIS delivers high-availability safety protection for critical process and hybrid applications while reducing engineering complexity and lifecycle costs.

Key Features

• Integrated Safety & Control: Logix SIS shares the same control and software infrastructure as the base process control system (BPCS), eliminating the need for separate hardware and software. This simplifies engineering, reduces start-up times, and allows reuse of existing skills and tools.
• SIL 2 / SIL 3 Certified: Provides comprehensive safety coverage across a wide range of industrial applications. The system achieves SIL 3 in synchronous mode and SIL 2 in non-synchronous or degraded modes, offering flexibility for various risk reduction requirements.
• High Availability Architecture: Built-in redundancy and failover mechanisms ensure continuous operation even in the event of a component failure. Redundant safety controllers, chassis, and power supplies minimize downtime and maximize productivity for critical processes.
• Rugged Industrial Design: Engineered for demanding industrial environments, the Logix SIS is built to withstand harsh conditions, ensuring reliable operation in applications such as oil and gas, chemical processing, power generation, and pharmaceutical manufacturing.
• RS485 Communication: Supports RS485 industrial network connectivity, enabling integration with existing field devices, legacy systems, and distributed control architectures.
• FLEX 5000 I/O Platform: Utilizes the FLEX 5000® safety I/O modules for flexible and scalable I/O configurations. The initial release supports FLEX 5000 safety I/O, with additional I/O types available for expanded applications.
• Studio 5000 Logix Designer: Programmed and configured using the industry-standard Studio 5000 Logix Designer® application, providing a familiar and intuitive programming environment for Rockwell Automation users.
• Scalable Architecture: Whether you operate a small facility or a large industrial plant, the Logix SIS is scalable to meet your specific needs, growing with your business.

Technical Specifications

• Safety Integrity Level: SIL 2 / SIL 3 (IEC 61508, IEC 61511, IEC 62061, ISO 13849-1)
• Communication Protocol: RS485
• Controller Series: 1756 ControlLogix® / GuardLogix® 5580
• I/O Modules: FLEX 5000® safety I/O (initial release)
• Redundancy Support: Redundant controllers, chassis, power supplies, and communication adapters
• Programming Environment: Studio 5000 Logix Designer® (Version 37.00+ for full compatibility)
• Rack Compatibility: Standard 5580 redundancy rack; all modules supported in standard 5580 redundancy are also supported (with substitution of ControlLogix controllers with GuardLogix controllers). P controllers are not supported in initial release.
• Safety Task Communication: Concurrent safety task communication; both controllers send data packets to I/O modules via adapters.
• SIL Level Details: SIL 3 achievable when synchronized; SIL 3 maintained during disqualification if repaired within MTTR; otherwise degrades to SIL 2. SIL 2 achievable when not synchronized.
• Standards Compliance: IEC 61508, IEC 61511, IEC 62061, ISO 13849-1, NFPA 85, NFPA 86, NFPA 87
• Certifications: TÜV certified for functional safety, CE, UL, cUL, ATEX (for hazardous locations), IECEx, Marine type approvals

Applications

The Logix SIS is ideal for a wide range of process and hybrid safety applications, including:

• Emergency shutdown (ESD) systems for oil and gas, chemical, and petrochemical plants.
• Burner management systems (BMS) for boilers and furnaces.
• High-integrity pressure protection systems (HIPPS).
• Turbomachinery control and protection.
• Fire and gas (F&G) detection systems.
• Pipeline monitoring and leak detection.
• Pharmaceutical and biotech manufacturing (batch safety).
• Power generation (turbine and generator protection).
• Any critical process requiring high-availability SIL 2 or SIL 3 safety protection.