SAI143-H63 YOKOGAWA

SAI143-H63 Yokogawa Input module

Brand：Yokogawa Model number：SAI143-H63

Country of origin: Japan Product weight：0.55kg

HS code：8538900000

Product Details：

Product Dimensions：

The Yokogawa SAI143-H63 is a high-performance analog input module designed for the ProSafe-RS Safety Instrumented System (SIS). It is specifically engineered to handle safety-critical applications by providing reliable and precise current signal acquisition from field devices.

Product Specifications

Module Type: Analog Current Input Module with HART communication support.
Input Channels: 16 channels, providing module-level isolation.
Rated Input Range: 4 to 20 mA.
Permissible Input Range: 0 to 25 mA.
Input Impedance: 250 Ω plus the voltage drop of the protection circuit (Power-ON); 500 kΩ minimum (Power-OFF).
Accuracy: Rated at ±16 μA (within the 0.05 to 23 mA range).
Data Update Frequency: 40 ms, ensuring rapid response for safety logic.
Temperature Drift: ±16 μA per 10 °C.
Withstand Voltage: 1.5 kV AC between the input signal and the system for 1 minute.
Power Consumption: 320 mA at 5 VDC and 550 mA at 24 VDC.
Physical Weight: Approximately 0.34 kg (standard) to 0.39 kg (with interface adapter).

Product Advantages

HART Communication Support: The "-H" suffix indicates that this module can pass HART digital signals, allowing for remote configuration and diagnostics of smart field instruments via Yokogawa's Plant Resource Manager (PRM).
High Reliability for Safety: As part of the ProSafe-RS family, it is designed for use in Emergency Shutdown Systems (ESD) and Fire and Gas Systems (FGS), meeting stringent global safety standards.
Flexible Wiring: The module supports both 2-wire and 4-wire transmitter settings. These can be adjusted individually for each channel using physical setting pins on the module.
Redundancy Capabilities: It supports dual-redundant configurations, which ensures that the safety system remains operational even if one module fails, significantly increasing plant availability.
Robust Environmental Resistance: The "-63" suffix typically denotes ISA Standard G3 conformal coating and an extended operating temperature range (-20 to 70 °C), making it suitable for harsh industrial environments.

Important Considerations (Precautions)

Open Circuit Risk: If the SAI143 module is turned off or fails, the current input loop becomes open-circuited. Therefore, you should not share the current signal with other signal-receiving instruments in a series loop.
Power Supply Limitations: In 2-wire settings, the transmitter power supply ON/OFF function applies to all 16 channels simultaneously. Individual channel power control is not available.
Channel Restrictions: When operated in ambient temperatures exceeding 60 °C, the number of usable input channels may be restricted to prevent overheating. Consult the ProSafe-RS technical manual for the specific derating curve.
Isolation Requirements: While the module provides isolation, no Zener barriers should be connected directly to it. An external isolation barrier must be used if an intrinsic safety (IS) instrumented system is required.

Product Applications

The SAI143-H63 is used extensively in industries where safety and high availability are non-negotiable.

Oil and Gas: Monitoring pressure and flow transmitters in offshore platforms and refineries where Emergency Shutdown (ESD) logic is critical.
Chemical Processing: Integrating with safety-rated sensors to prevent overpressure or thermal runaway in chemical reactors.
Power Generation: Serving as a reliable input for boiler protection systems and turbine control safety loops.
Environmental Control: Used in toxic or combustible gas detection systems to trigger alarms and ventilation.

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