Product Description

The SSC50D-S2111 is a high-performance Duplexed Safety Control Unit at the core of the ProSafe-RS Safety Instrumented System (SIS). It is designed for fault-tolerant execution of safety logic, managing system-wide safety functions with maximum reliability. The unit features Yokogawa’s “Pair & Spare” duplexed architecture, where two CPU modules operate in parallel. If one module fails, the other immediately maintains control, ensuring uninterrupted protection and compliance with SIL3 requirements for critical industrial processes.

Technical Specifications

Industrial Application Scenarios

The SSC50D-S2111 is deployed in:

• Emergency Shutdown (ESD) Systems

• Fire & Gas Systems (FGS)

• Burner Management Systems (BMS)

• Oil & Gas, Petrochemical, and Power Generation Plants

Its duplexed architecture ensures uninterrupted protection in environments where process shutdowns are costly or dangerous. The module integrates seamlessly with Yokogawa CENTUM VP DCS for unified yet physically separated control and safety operations.

Technical FAQs

1. What is the “Pair & Spare” architecture?
This design uses two CPUs that continuously cross-check each other (“voted” logic). Any internal fault is instantly detected, preventing fail-to-danger scenarios and ensuring continuous plant protection.

2. Is the SSC50D-S2111 hot-swappable?
Yes. In a redundant setup, individual CPU modules or power supplies can be replaced without interrupting the system’s operation or safety coverage.

3. What industries benefit most from this module?
High-consequence industries such as oil & gas, petrochemical processing, and power generation, where SIL3-rated safety loops are required.