Product Description
The SSC50D-S2524 serves as the central processing core for the Yokogawa Electric Corporation ProSafe-RS Safety Instrumented System (SIS).
This duplexed safety control unit is engineered to execute safety-critical logic using a fault-tolerant architecture, ensuring that a single hardware failure does not compromise process safety or overall system availability. Certified for SIL3 applications in accordance with IEC 61508, the SSC50D-S2524 integrates seamlessly into Vnet/IP control network environments.
It manages I/O modules through the safety communication bus (ESB/Optical ESB) and executes safety loops for Emergency Shutdown (ESD) and Fire & Gas (F&G) systems with high-speed deterministic processing.
Designed for high-demand industries such as oil & gas, LNG, and petrochemicals, the SSC50D-S2524 forms the core of a Safety Control Station (SCS), supporting Yokogawa’s “Pair & Spare” redundancy philosophy to ensure continuous protection even during maintenance or internal faults.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Identification | SSC50D-S2524 |
| Processor Architecture | Duplexed (redundant) CPUs |
| Control Network | Vnet/IP (100 Mbps full duplex) |
| Power Input | Dual redundant 24 V DC feeds (18–30 V DC) |
| Power Consumption | 45 W nominal / 80 W maximum |
| CPU Memory Protection | ECC (Error Correction Code) |
| I/O Bus Interface | ESB Bus or Optical ESB Bus supported |
| Mounting Format | 19-inch rack mount (6U or 9U enclosure) |
| Thermal Management | Forced air cooling (integrated fan units) |
| Operating Temperature | -10°C to +60°C |
| Dimensions | 482.6 mm (W) × 266 mm (H) × 88.1 mm (D) |
| Weight | 8.5 kg |
Application and Operational Context
The SSC50D-S2524 is typically installed within a Safety Control Station (SCS) cabinet and functions as the primary safety logic solver for plant-wide protection systems.
Typical deployment sectors include:
-
Upstream oil and gas production platforms
-
LNG liquefaction and regasification terminals
-
Petrochemical refineries and chemical processing complexes
-
Power generation facilities requiring integrated ESD and F&G systems
Its duplex architecture ensures that safety functions remain continuously active, even in the event of processor-level faults or during planned maintenance activities.
FAQ
What does the S2524 suffix represent?
The suffix defines the hardware revision and power configuration. The “2” indicates dual redundant power supplies, while “524” relates to the firmware generation and Vnet/IP interface compatibility.
How does the duplexed architecture improve safety?
The SSC50D-S2524 operates two processors in parallel. Both CPUs execute identical safety logic simultaneously and continuously compare results. If any discrepancy is detected, the system isolates the faulty side and maintains operation using the healthy processor, while generating a diagnostic alarm.
Can I upgrade an existing SSC50S to an SSC50D?
Although both belong to the ProSafe-RS family, the SSC50D-S2524 is physically and logically designed for duplex operation. Upgrading from a single (S) to duplex (D) configuration typically requires hardware replacement and reconfiguration within the ProSafe-RS Engineering Station.
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| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
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| A: All our new and original products come with a standard one-year warranty. |
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