Product Description

The SDV544-S23 is a high-reliability safety digital output module engineered for the Yokogawa ProSafe-RS Safety Instrumented System (SIS). It provides 16 isolated output channels for actuating critical field devices such as solenoid valves, warning beacons, and relay coils.

Certified for SIL3 safety applications, the SDV544-S23 ensures that final control elements transition reliably to their defined safe state during emergency conditions. It is a core execution element within safety-critical shutdown and mitigation logic.

The module incorporates advanced pulse-test diagnostics, allowing continuous verification of each output circuit’s operational integrity. This testing detects internal hardware failures and field-side wiring faults—including short circuits and open loops—without interrupting the energized load. Its ruggedized design makes it well suited for harsh industrial safety environments.

Technical Specifications

Application Scenarios

The SDV544-S23 is widely deployed in high-hazard process industries, including:

• Oil & gas refineries

• Chemical and petrochemical plants

• Nuclear and conventional power generation facilities

It functions as the final actuation layer for Emergency Shutdown (ESD) and Fire & Gas (F&G) systems, where deterministic and fault-tolerant output behavior is mandatory.

Online Replacement Capability

Yes. When installed in a dual-redundant ProSafe-RS configuration, the SDV544-S23 supports hot swapping. One module can be replaced online while the redundant partner continues to control the safety outputs, ensuring no interruption to the safety instrumented function.