Yokogawa SSC50D-S2513 Duplexed Safety Control Unit

The Yokogawa SSC50D-S2513 Duplexed Safety Control Unit is a core component within the ProSafe-RS safety instrumented system, specifically designed for applications requiring high levels of safety integrity, redundancy, and continuous operation. This unit is primarily deployed in process industries such as oil & gas, petrochemicals, power generation, and other mission-critical environments where safety, reliability, and compliance with international safety standards (such as IEC 61508 SIL3) are required.

By adopting a duplexed architecture, the SSC50D-S2513 enhances system reliability through parallel operation of two safety CPUs. In the event of a fault in one channel, the other maintains seamless operation, ensuring that plant safety is never compromised. This architecture allows it to support demanding safety logic, interlock systems, and emergency shutdown (ESD) functionalities.

The SSC50D-S2513 integrates smoothly with Yokogawa’s ProSafe-RS and CENTUM VP control platforms, ensuring a unified and efficient process control and safety management environment.

Product Advantages

• High Redundancy: Duplexed CPU design guarantees uninterrupted operation during single module failures.

• Safety Integrity: Certified up to SIL3 under IEC 61508 standards, ensuring maximum safety in hazardous environments.

• Seamless Integration: Compatible with ProSafe-RS and CENTUM VP for unified process and safety control.

• Scalability: Flexible enough to support small, medium, and large-scale safety applications.

• Fault Tolerance: Real-time diagnostics and self-checking functions reduce downtime.

• Regulatory Compliance: Designed to meet international safety standards demanded by oil, gas, and power industries.

Technical Specifications

Product Applications

• Emergency Shutdown Systems (ESD): Ensures immediate shutdown during hazardous conditions.

• Fire & Gas Systems (F&G): Provides reliable detection and response to fire or gas leaks.

• High Integrity Pressure Protection Systems (HIPPS): Protects pipelines and vessels against overpressure.

• Burner Management Systems (BMS): Secures safe ignition and shutdown of industrial burners.

• Process Interlock Systems: Prevents unsafe operating sequences and ensures logical interlocking.

• Nuclear and Power Plants: Used in reactor protection and safety-related interlock control.

FAQ

Q1: What safety integrity level does the SSC50D-S2513 comply with?

A1: It complies with IEC 61508 SIL3, making it suitable for critical safety applications.

Q2: Can the SSC50D-S2513 operate in a non-redundant configuration?

A2: Yes, although it is designed for duplex redundancy, it can be configured in a simplex mode depending on project requirements.

Q3: How does the duplexed CPU architecture enhance system reliability?

A3: The dual CPUs operate in parallel, continuously cross-checking each other. If one fails, the other takes over without interruption.

Q4: What communication protocol is used for system integration?

A4: The unit supports Vnet/IP, enabling high-speed and reliable integration with ProSafe-RS and CENTUM VP systems.

Q5: How are diagnostic functions implemented in the SSC50D-S2513?

A5: The module includes self-diagnostic routines, watchdog timers, and fault detection circuits to ensure continuous monitoring.

Q6: Is the SSC50D-S2513 compatible with non-Yokogawa systems?

A6: It is optimized for Yokogawa platforms but can communicate with external systems via standard protocols, such as OPC or Modbus gateways.

Q7: Can the power supply for the SSC50D-S2513 be redundant?

A7: Yes, redundant power supply inputs are supported to improve availability and prevent power-related failures.

Q8: What is the maximum number of I/O modules supported by this unit?

A8: It supports a scalable range, typically up to several hundred I/O points, depending on system configuration.

Q9: How does the unit handle firmware updates?

A9: Firmware can be updated online with redundancy management, ensuring the system continues to operate during updates.

Q10: Does the SSC50D-S2513 support hot-swappable module replacement?

A10: Yes, it supports hot-swapping, allowing modules to be replaced without shutting down the entire system.