Yokogawa SSC50D-S2511 Duplexed Safety Control Unit

Product Introduction

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The Yokogawa SSC50D-S2511 is a high-reliability Duplexed Safety Control Unit designed for critical safety applications in industrial automation. It ensures fail-safe operation by employing redundant (duplexed) architecture, minimizing the risk of system failure. This unit is widely used in process industries where safety and reliability are paramount, such as oil & gas, chemical plants, and power generation.

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Product Specifications

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Product Applications

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The SSC50D-S2511 is engineered for high-integrity safety systems in hazardous environments. Key applications include:

• Emergency Shutdown Systems (ESD) – Ensures rapid and reliable shutdown in critical situations.

• Fire & Gas Detection Systems – Monitors and triggers safety responses in case of gas leaks or fire.

• Burner Management Systems (BMS) – Controls and safeguards combustion processes.

• Turbomachinery Control – Protects rotating equipment from catastrophic failures.

• Process Safety Systems – Used in refineries and chemical plants to prevent hazardous incidents.

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Product Advantages

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• Redundant Architecture – Dual-channel design ensures continuous operation even if one channel fails.

• High SIL Rating – Complies with SIL 3 (IEC 61508), making it suitable for the most demanding safety applications.

• Robust Communication – Supports RS-485 and Ethernet for seamless integration with control systems.

• Wide Environmental Tolerance – Operates reliably in extreme temperatures and humidity conditions.

• Global Certifications – Meets CE, ATEX, IECEx, and FM standards for international deployment.

• Easy Maintenance – Modular design allows for quick replacement and reduced downtime.

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FAQ

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1. What is the maximum allowable voltage fluctuation for the SSC50D-S2511?

The unit can tolerate a ±10% variation from the nominal 24 VDC supply.

2. Does the SSC50D-S2511 support HART communication?

No, it does not natively support HART. It primarily uses RS-485 and Ethernet for communication.

3. Can this unit be used in Zone 0 hazardous areas?

No, it is certified for Zone 1 and Zone 2 (ATEX/IECEx) but not Zone 0.

4. What is the response time of the safety shutdown function?

The typical response time is < 100 ms, depending on the configuration.

5. Is hot-swapping possible for module replacement?

No, the unit must be powered down before any module replacement to prevent safety risks.

6. How many I/O points does the SSC50D-S2511 support?

The base model supports 16 digital I/O points, with expansion options available.

7. What diagnostics features are included?

It provides real-time fault detection, channel discrepancy alarms, and self-test diagnostics.

8. Can it be integrated with Yokogawa’s CENTUM VP DCS?

Yes, it is fully compatible with CENTUM VP via Ethernet or RS-485.

9. What is the MTBF (Mean Time Between Failures) for this unit?

The MTBF exceeds 100,000 hours under normal operating conditions.

10. Does it support third-party safety relays?

Yes, but compatibility must be verified based on the relay’s certification and interface requirements.

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