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Product Introduction
The Yokogawa SSC50D-S2521 is a high-performance duplexed safety control unit designed for critical industrial applications requiring fail-safe operation. It ensures reliable process control and safety system integration, making it ideal for industries such as oil & gas, chemical, and power generation. The unit features redundant architecture to minimize downtime and enhance system availability.
Product Specifications
| Parameter | Specification |
|---|---|
| Model | SSC50D-S2521 |
| Type | Duplexed Safety Control Unit |
| Input Voltage | 24 VDC (±10%) |
| Power Consumption | ≤ 15 W |
| Operating Temp. | -20°C to +60°C |
| Humidity Range | 10% to 90% RH (non-condensing) |
| Communication | Ethernet, RS-485 |
| Safety Certification | SIL 3 (IEC 61508), TÜV Certified |
| Dimensions | 482.6 x 266 x 88.1 mm |
| Weight | 8.5 kg |
| Mounting | DIN rail or panel mount |
Product Applications
The SSC50D-S2521 is widely used in safety-critical systems where redundancy and reliability are paramount. Key applications include:
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Emergency Shutdown Systems (ESD) in oil refineries.
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Fire & Gas Detection Systems in chemical plants.
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Burner Management Systems (BMS) in power plants.
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Process Safety Systems in pharmaceutical manufacturing.
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Turbine Control Systems in energy production.
Product Advantages
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Redundant Architecture – Ensures continuous operation even if one module fails.
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High Safety Integrity – SIL 3 certified for critical safety applications.
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Fast Response Time – Minimizes process interruptions during fault conditions.
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Flexible Communication – Supports multiple industrial protocols for seamless integration.
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Robust Design – Operates reliably in harsh industrial environments.
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Easy Maintenance – Modular design allows quick replacement of components.
FAQ
1. What is the maximum number of I/O points supported by the SSC50D-S2521?
The unit supports up to 256 digital I/O points and 64 analog I/O points in a fully configured system.
2. Can the SSC50D-S2521 be integrated with third-party PLCs?
Yes, it supports standard communication protocols like Modbus TCP/IP and PROFIBUS for integration with third-party systems.
3. What is the fault detection time of this safety controller?
The fault detection time is typically less than 100 ms, ensuring rapid response to hazardous conditions.
4. Does the SSC50D-S2521 support hot-swapping of modules?
Yes, it supports hot-swapping for maintenance without system shutdown.
5. What type of diagnostics are available for troubleshooting?
The unit provides real-time diagnostics, including module status, communication errors, and power supply monitoring.
6. Is the SSC50D-S2521 compatible with Yokogawa’s ProSafe-RS safety system?
Yes, it is fully compatible and can be used as part of a ProSafe-RS safety instrumented system.
7. What is the maximum communication distance for RS-485?
The maximum recommended distance is 1200 meters at 115.2 kbps.
8. Can the unit operate in a high-electromagnetic interference (EMI) environment?
Yes, it is designed with EMI shielding and meets industrial EMC standards.
9. How is firmware updated on the SSC50D-S2521?
Firmware updates can be performed via Ethernet using Yokogawa’s dedicated engineering tool.
10. What redundancy protocols are supported for duplex operation?
The unit supports 1:1 redundancy with automatic switchover in case of primary module failure.
Recommended Related Models (Same Series)
| Model | Description | Key Feature |
|---|---|---|
| SSC50D-S2522 | Enhanced Duplexed Safety Controller | Higher I/O capacity (512 points) |
| SSC50D-S2510 | Basic Safety Control Unit | Cost-effective SIL 2 solution |
| SSC50D-S2530 | Advanced Redundant Controller | Supports PROFINET communication |
| SSC50D-S2540 | High-Speed Safety Controller | 50 ms response time |
| SSC50D-S2550 | Explosion-Proof Safety Unit | ATEX-certified for hazardous areas |
| SSC50D-S2560 | Compact Safety Controller | Space-saving design |
Popular Yokogawa Models (Same Brand)
| Model | Description | Application |
|---|---|---|
| ProSafe-RS | Safety Instrumented System | Oil & Gas, Chemical Plants |
| CENTUM VP | Distributed Control System (DCS) | Process Automation |
| FA-M3 | Programmable Controller | Factory Automation |
| WT3000 | Precision Power Analyzer | Energy Management |
| DX1000 | Data Acquisition System | Industrial Monitoring |
| UTAdvanced | Ultrasonic Flow Meter | Liquid & Gas Measurement |
