Yokogawa SSC10D-S2111 Duplexed Safety Control Unit

Company Information
E-mail		[email protected]
Mobile		+8613666033393
Whatsapp		+8613666033393
WeChat		13666033393
Add		Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China

Product Introduction

The Yokogawa SSC10D-S2111 Duplexed Safety Control Unit is a high-integrity, fault-tolerant safety controller developed for use in Yokogawa’s ProSafe-RS Safety Instrumented System (SIS). Designed to meet the most stringent safety and reliability standards, the SSC10D-S2111 is responsible for executing safety logic, managing redundant safety I/O operations, and ensuring continuous plant operation even in the event of hardware or communication faults.

This controller integrates seamlessly with CENTUM VP and other Yokogawa distributed control systems, forming a unified architecture for both process control and safety management. It employs a dual-redundant architecture, where two processors operate in parallel to continuously cross-check logic execution, guaranteeing safe operation even if one processor fails.

The SSC10D-S2111 provides superior diagnostics, self-checking mechanisms, and deterministic performance. It is widely used in industries where process safety, reliability, and availability are paramount — including oil & gas, petrochemical, power generation, and refining sectors.

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Product Specifications

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Product Applications

The SSC10D-S2111 Duplexed Safety Control Unit is engineered to provide dependable safety control and process shutdown capabilities across various industries. Its duplex architecture ensures continuous plant protection and system integrity.

• Oil & Gas Production – Used in emergency shutdown (ESD), fire and gas (F&G), and high-integrity pressure protection systems (HIPPS).

• Petrochemical & Refining – Provides safe interlocks for critical equipment such as compressors, reactors, and furnaces.

• Power Generation – Controls turbine overspeed protection, boiler safety, and auxiliary system monitoring.

• Chemical Processing – Ensures safety interlocks, reactor pressure control, and hazardous gas containment.

• Offshore Platforms – Manages safety shutdown and fire detection integration in offshore drilling and production facilities.

• Pipeline Control Systems – Implements leak detection, isolation, and pressure control mechanisms.

The SSC10D-S2111 delivers precise and immediate response to hazardous conditions, ensuring personnel and equipment protection while maintaining operational continuity.

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Product Advantages

• High Safety Integrity (SIL3) – Meets IEC 61508 standards, guaranteeing reliable safety performance.

• Duplexed Redundancy – Two processors operate in parallel (1oo2D), allowing fault tolerance without system interruption.

• Unified Architecture – Integrates seamlessly with CENTUM VP for both control and safety, reducing engineering workload.

• Online Maintenance – Modules can be replaced or updated while the system remains operational.

• Advanced Diagnostics – Continuous health monitoring and self-diagnostics minimize unplanned shutdowns.

• Flexible Configuration – Scalable to thousands of I/O points and adaptable to diverse plant structures.

• Deterministic Performance – Real-time control and predictable execution cycle ensure precise safety logic operation.

• Robust Communication – Dual-redundant Vnet/IP provides high-speed and reliable data transfer.

• Low Lifecycle Cost – Modular design and reduced engineering complexity result in lower maintenance expenses.

• Proven Field Reliability – Extensively deployed in critical safety systems worldwide.

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FAQ

1. What safety standard does the SSC10D-S2111 comply with?
   It complies with IEC 61508 and IEC 61511, certified for Safety Integrity Level 3 (SIL3).

2. How does the duplex architecture function?
   It uses a 1oo2D configuration where two processors run identical logic simultaneously and continuously compare results to ensure safe operation.

3. Can the SSC10D-S2111 communicate with non-Yokogawa systems?
   Yes, it supports open communication protocols such as Modbus TCP and Modbus RTU for integration with third-party systems.

4. Does the controller support online software modification?
   Yes, the system allows online configuration changes under controlled safety conditions.

5. What happens if one CPU fails?
   If one processor fails, the other continues operation seamlessly, maintaining full system functionality without interruption.

6. Is redundancy available for communication networks?
   Yes, the SSC10D-S2111 provides dual-redundant Vnet/IP communication to ensure continuous data transmission.

7. What diagnostic features are included?
   It features continuous self-check, watchdog timers, communication monitoring, and module-level fault detection.

8. Can firmware be updated while in operation?
   Yes, firmware updates can be performed online without system shutdown, depending on configuration.

9. What is the typical response time for safety actions?
   The controller executes safety logic within approximately 50 milliseconds.

10. Is the SSC10D-S2111 compatible with ProSafe-RS configuration tools?
    Yes, it is fully compatible with Yokogawa’s SCS Logic Designer and Safety Control Station (SCS) software environment.

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FAQ

1. What safety standard does the SSC10D-S2111 comply with?
   It complies with IEC 61508 and IEC 61511, certified for Safety Integrity Level 3 (SIL3).

2. How does the duplex architecture function?
   It uses a 1oo2D configuration where two processors run identical logic simultaneously and continuously compare results to ensure safe operation.

3. Can the SSC10D-S2111 communicate with non-Yokogawa systems?
   Yes, it supports open communication protocols such as Modbus TCP and Modbus RTU for integration with third-party systems.

4. Does the controller support online software modification?
   Yes, the system allows online configuration changes under controlled safety conditions.

5. What happens if one CPU fails?
   If one processor fails, the other continues operation seamlessly, maintaining full system functionality without interruption.

6. Is redundancy available for communication networks?
   Yes, the SSC10D-S2111 provides dual-redundant Vnet/IP communication to ensure continuous data transmission.

7. What diagnostic features are included?
   It features continuous self-check, watchdog timers, communication monitoring, and module-level fault detection.

8. Can firmware be updated while in operation?
   Yes, firmware updates can be performed online without system shutdown, depending on configuration.

9. What is the typical response time for safety actions?
   The controller executes safety logic within approximately 50 milliseconds.

10. Is the SSC10D-S2111 compatible with ProSafe-RS configuration tools?
    Yes, it is fully compatible with Yokogawa’s SCS Logic Designer and Safety Control Station (SCS) software environment.

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