Description

Brief Product Description

The Yokogawa SPW481-13 S1 is a high-reliability power supply module specifically engineered for the ProSafe-RS safety instrumented system.¹ It converts 100-120V AC input into stable, isolated 24V DC power to support critical safety controllers and field instrumentation.

Reliable Power Infrastructure for Safety Systems

The Yokogawa SPW481-13 S1 serves as the foundational energy source for the ProSafe-RS safety control architecture. By converting standard 100-120V AC mains power into a regulated 24V DC output, this module ensures that safety controllers and I/O components operate without interruption. This consistent power delivery proves vital for preventing spurious trips and maintaining the integrity of safety loops in high-risk industrial sectors. Because the module integrates seamlessly into standard 19-inch racks, engineers can easily incorporate it into existing safety system cabinets alongside SCP461 controllers. Consequently, the SPW481-13 S1 provides the electrical stability required to safeguard personnel and expensive machinery in refineries and chemical processing plants.

Compliance with Stringent Functional Safety Standards

Adherence to international safety regulations distinguishes the SPW481-13 S1 as a premier choice for high-integrity applications. The module fully complies with IEC 61508 and IEC 61511-1 standards, supporting systems that require rigorous Safety Integrity Level (SIL) ratings. To further enhance system resilience, the module features advanced electrical isolation that protects sensitive logic circuits from line noise and voltage fluctuations. Transitioning to this certified power solution allows facility managers to meet global regulatory requirements while ensuring that their safety instrumented systems (SIS) remain responsive during emergency shutdown scenarios.

Durable Design for Harsh Industrial Environments

Yokogawa engineered the SPW481-13 S1 to withstand the extreme conditions often found in heavy industry. The unit operates reliably across a broad temperature spectrum, from -20°C to +70°C, and meets ISA Standard G3 specifications for resistance against corrosive environmental contaminants.² This ruggedized construction ensures a long service life even when installed in remote or unconditioned field enclosures. Furthermore, the module’s efficient thermal management reduces heat dissipation, which extends the longevity of neighboring electronic components. By combining industrial-grade durability with precise voltage regulation, the SPW481-13 S1 maintains a dependable power foundation for the most demanding process safety environments.

Key Technical Characteristics

• Stable 24V DC Output: Delivers clean and regulated power to safety controllers and field instruments.³
• ProSafe-RS Compatibility: Designed specifically for integration with Yokogawa safety instrumented systems.
• Wide Operational Temperature: Functions efficiently in extreme climates ranging from -20°C to +70°C.
• G3 Corrosive Protection: Built to resist harsh atmospheric conditions according to ISA G3 standards.⁴
• Functional Safety Certified: Supports compliance with IEC 61508 and IEC 61511-1 safety benchmarks.⁵
• Rack-Mount Design: Optimized for installation in standard 19-inch rack-mounted safety control units.

Technical Specifications