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Application Scenarios
A refinery’s hydrocracker unit relied on a legacy safety system approaching end-of-life, but a full SIS replacement threatened to consume an entire turnaround window and disrupt production for weeks. The plant selected the SSC10D-S2111 as the processing core for a ProSafe-RS retrofit because its native integration with the existing CENTUM VP DCS allowed engineers to preserve field wiring, I/O modules, and operator stations. During commissioning, a processor fault was deliberately induced to validate redundancy: the standby module assumed control within milliseconds, and the safety logic continued without a single dropped scan. For operators managing ESD, HIPPS, or BMS loops where a spurious trip costs six figures and a failure to trip is unacceptable, the SSC10D-S2111 delivers the fault-tolerant determinism that keeps both risk and downtime within bounds.
Parameter
| Parameter | Value/Description |
|---|---|
| Product Model | SSC10D-S2111 |
| Manufacturer | Yokogawa Electric Corporation |
| Product Category | Duplexed Safety Control Unit (SIS Controller) |
| System Platform | ProSafe-RS Safety Instrumented System |
| Processor Architecture | Dual redundant 1oo2D, MIPS R5000 32-bit RISC |
| Memory | 32 MB Flash / 64 MB RAM |
| Safety Integrity Level | SIL3 (IEC 61508 / IEC 61511), TÜV certified |
| Safety Logic Response | ≤10 ms (some sources cite ≤50 ms typical) |
| Redundancy Switchover | ≤1 ms, bumpless |
| Power Supply | 100–120 V AC, dual-redundant (suffix -S2111 configuration) |
| Power Consumption | Approximately 200 VA |
| Communication Interfaces | Vnet/IP dual-redundant 100 Mbps; ESB bus dual-redundant 128 Mbps |
| I/O Expansion Capacity | Up to 9 Safety Node Units (SNB10D) |
| Operating Temperature | –10°C to +55°C (standard type, fanless convection cooling) |
| Dimensions | 482.6 × 266 × 88.1 mm (19-inch rack mount, 2U) |
| Weight | Approximately 8.5 kg |
| Certifications | TÜV, CE, ATEX, IECEx, CSA, UL |
