Product Description

The SAI143-H53 S2 is a high-performance analog input module designed for the Yokogawa ProSafe-RS Safety Instrumented System (SIS). It is engineered to interface with 4–20 mA field transmitters, providing 16 isolated input channels for accurate signal acquisition in safety-critical control environments.

The module integrates HART communication support, enabling transparent pass-through of device diagnostics, configuration data, and status information while maintaining continuous operation of the safety loop. This capability allows operators and maintenance engineers to access transmitter data without interrupting the process.

Designed for extreme industrial environments, the SAI143-H53 S2 complies with ISA S71.04 G3 environmental standards, ensuring strong resistance to corrosive atmospheric contaminants. The module also supports a global ON/OFF transmitter power supply function for 2-wire transmitters, simplifying field device power management across all channels.

With high-speed 40 ms update cycles, robust isolation protection, and compatibility with ProSafe-RS SIL architectures, the module is ideal for high-availability safety applications requiring dependable and precise analog signal monitoring.

Technical Specifications

Application Scenarios

The SAI143-H53 S2 is widely deployed in safety-critical process industries, including:

• Oil and gas refining

• Chemical manufacturing plants

• Offshore production platforms

• Petrochemical processing facilities

Typical field applications include monitoring pressure, temperature, flow, and level transmitters, where high reliability and environmental durability are essential for maintaining continuous plant safety and preventing unplanned shutdowns.

Technical FAQ

How does G3 compliance benefit industrial installations?
The ISA G3 environmental rating indicates that the module is designed with enhanced corrosion resistance, typically through conformal coating and high-grade components, protecting it from airborne contaminants such as hydrogen sulfide and sulfur dioxide. This significantly improves long-term reliability in harsh industrial atmospheres.

Does the module support both 2-wire and 4-wire transmitters?
Yes. The SAI143-H53 S2 supports 2-wire transmitters using its integrated power supply and 4-wire transmitters with external power sources. However, the internal transmitter power control is applied collectively across all 16 channels, rather than individually per channel.