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Product Introduction
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.
Product Specifications
| Parameter | Specification |
|---|---|
| Model | SSC50D-S2511 |
| Type | Duplexed Safety Control Unit |
| Input Voltage | 24 VDC (±10%) |
| Power Consumption | ≤ 15 W |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Humidity Range | 10% to 90% RH (non-condensing) |
| Safety Integrity Level (SIL) | SIL 3 (IEC 61508) |
| Communication Interface | RS-485, Ethernet (optional) |
| Dimensions | 482.6 x 266 x 88.1 mm |
| Weight | 8.5 kg |
| Certifications | CE, ATEX, IECEx, FM |
Product Applications
The SSC50D-S2511 is engineered for high-integrity safety systems in hazardous environments. Key applications include:
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Emergency Shutdown Systems (ESD) – Ensures rapid and reliable shutdown in critical situations.
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Fire & Gas Detection Systems – Monitors and triggers safety responses in case of gas leaks or fire.
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Burner Management Systems (BMS) – Controls and safeguards combustion processes.
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Turbomachinery Control – Protects rotating equipment from catastrophic failures.
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Process Safety Systems – Used in refineries and chemical plants to prevent hazardous incidents.
Product Advantages
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Redundant Architecture – Dual-channel design ensures continuous operation even if one channel fails.
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High SIL Rating – Complies with SIL 3 (IEC 61508), making it suitable for the most demanding safety applications.
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Robust Communication – Supports RS-485 and Ethernet for seamless integration with control systems.
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Wide Environmental Tolerance – Operates reliably in extreme temperatures and humidity conditions.
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Global Certifications – Meets CE, ATEX, IECEx, and FM standards for international deployment.
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Easy Maintenance – Modular design allows for quick replacement and reduced downtime.
FAQ
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.
Recommended Related & Similar Models
Same Series / Related Models
| Model | Description | Key Feature |
|---|---|---|
| SSC50D-S2510 | Non-redundant Safety Control Unit | Lower cost, single-channel design |
| SSC50D-S2520 | Enhanced Duplexed Unit | Higher I/O capacity |
| SSC50D-S2530 | SIL 3 Certified with Ethernet | Advanced networking support |
| SSC50D-S2540 | Explosion-Proof Version | ATEX Zone 1 certification |
| SSC50D-S2550 | High-Temperature Variant | Operates up to 85°C |
| SSC50D-S2560 | Wireless-Enabled Safety Unit | Supports wireless safety protocols |
Other Popular Yokogawa Models
| Model | Description | Application |
|---|---|---|
| ProSafe-RS | Safety Instrumented System (SIS) | Full-scale process safety |
| CENTUM VP | Distributed Control System (DCS) | Plant-wide automation |
| FA-M3 | Programmable Safety Controller | Machine safety applications |
| YTA Series | Temperature Transmitters | Precision process monitoring |
| EJX Series | Differential Pressure Transmitters | Flow and level measurement |
| VigilantPlant | Asset Management Solution | Predictive maintenance |
