Product Description
The SSC50D-S2521 is a high-integrity Safety Control Unit (SCU) engineered for the ProSafe-RS Safety Instrumented System (SIS) from Yokogawa Electric Corporation.
Designed to meet SIL3 requirements in accordance with IEC 61508, this rack-mounted controller features a dual-redundant “Pair & Spare” architecture, where two independent processor modules execute safety logic in parallel. This structure ensures uninterrupted safety function execution even if one processor fails, minimizing nuisance trips and maximizing plant availability.
The -S2521 variant is optimized for seamless integration into Vnet/IP networks, enabling high-speed synchronization with CENTUM VP Distributed Control Systems while maintaining strict safety segregation. It serves as a cornerstone controller for protecting critical assets in high-risk industrial operations.
Technical Specifications
| Item | Specification |
|---|---|
| Model | SSC50D-S2521 |
| Processor Architecture | Dual MIPS R5000 real-time processors |
| Memory | 32 MB with ECC protection |
| I/O Capacity | Up to 128 local safety I/O points |
| Network Communication | Vnet/IP (1 Gbps), RS-232C, RS-485 |
| Power Supply Options | 100–120 V AC, 220–240 V AC, or 24 V DC (model dependent) |
| Operating Temperature | -20°C to +70°C |
| Mounting | 19-inch rack mount |
| Dimensions (W × H × D) | 483 mm × 133 mm × 451 mm |
Industrial Application Scenarios
The SSC50D-S2521 is widely deployed in safety-critical applications, including:
-
Emergency Shutdown Systems (ESD)
-
Fire & Gas Systems (FGS)
-
Burner Management Systems (BMS)
-
Offshore platforms
-
Petrochemical and refining complexes
-
Nuclear and conventional power generation plants
Its deterministic execution and redundant architecture make it ideal for environments where safety logic continuity is mandatory.
Technical FAQ
Does the SSC50D-S2521 support online hardware replacement?
Yes. Thanks to its dual-redundant processor design, a faulty module can be replaced online without interrupting active safety functions or forcing a plant shutdown.
How does the SSC50D-S2521 integrate with an existing DCS?
It connects directly to the Vnet/IP network and operates as a native safety node. Process data can be shared with CENTUM VP workstations for unified monitoring while preserving physical and logical safety separation.
What does the “S2521” suffix indicate?
The -S2521 suffix defines specific configuration details such as power supply type, mounting specification, and firmware revision compatibility, ensuring correct alignment with existing system architecture.
| Quick Quotes | Receive price & availability FAST from our dedicated customer service team. |
|---|---|
| Delivery | Expedited, Freight, And International Shipping Available. |
| Condition | 100% New with Original Package |
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| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
| Q: Is Our Pricing Competitive? |
| A: Yes, we collaborate with over 50 countries worldwide. As a top supplier in China, we offer significant discounts based on market trends. |
| Q: What Is the Warranty Period? |
| A: All our new and original products come with a standard one-year warranty. |
| Q: What Payment Methods Do We Accept? |
| A: We require 100% T/T (Telegraphic Transfer) payment before shipping. For items with a lead time, a 30% deposit is needed upfront, and the remaining 70% is due before shipping. If you have a representative in China, you can arrange an RMB transfer through them. |
| Q: What Shipping Methods Do We Use? |
| A: We primarily use FedEx, DHL, UPS, and BRE for shipping. If you have an account with any of these carriers, you can handle shipping directly. We also offer free shipping to China-based freight forwarders. |
| Q: What Is Our Delivery Time? |
| A: Delivery usually takes 1-3 days after receiving the initial payment. For items with a lead time, shipping will occur according to the specified schedule. |
| Q: How Do We Package the Goods? |
| A: We ensure safe packaging with multiple layers of protection. Products are first placed in their original boxes and sealed with labels. A layer of bubble wrap is then added for collision protection during transit. Finally, the items are packed securely in durable boxes. |
| Q: How Can Customers Contact Us and Request a Quote? |
| A: You can reach out to us via email, WhatsApp, WeChat, Skype, or your preferred communication platform. Contact us with your needs, and we'll provide a prompt, customized quote. |
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