Product Description

The SDV144-S53/STB4D-00 is a high-density safety digital input module developed for the Yokogawa ProSafe-RS Safety Instrumented System. It provides 16 isolated digital input channels for interfacing with field devices such as pressure switches, emergency stop pushbuttons, and limit switches.

Designed for SIL3 safety applications, the module performs continuous internal self-diagnostics, ensuring that every input signal is validated before being accepted by the safety logic solver. This guarantees deterministic and fault-tolerant operation in high-risk process environments.

A key feature of the SDV144-S53/STB4D-00 is its advanced line monitoring capability, which can clearly distinguish between a valid contact state and wiring faults such as open circuits or short circuits. Its compact footprint and efficient power usage make it well suited for high-density safety cabinets where space optimization is critical.

Technical Specifications

Application Scenarios

The SDV144-S53/STB4D-00 is widely deployed in oil & gas, power generation, and chemical processing facilities. It functions as the primary sensing interface in:

• Emergency Shutdown (ESD) systems

• Fire & Gas (F&G) protection systems

By ensuring rapid and validated detection of hazardous conditions, the module enables immediate and reliable safety responses.

Redundancy Support

Yes. The SDV144-S53/STB4D-00 supports dual-redundant configuration within ProSafe-RS I/O racks. In this setup, if one module experiences an internal fault, the partner module assumes operation instantly—allowing hot swapping and online maintenance without interruption of the safety function or plant operation.