The Yokogawa SAI143-S03 S1 is a high-performance 16-channel analog input module designed for integration within the ProSafe-RS safety instrumented system. Supporting 4–20 mA current inputs with channel-level isolation and precise accuracy, it enables reliable signal acquisition from process transmitters in industrial environments. The module is engineered to ensure safety, operational efficiency, and long-term stability even in harsh conditions. With the flexibility of individual 2-wire or 4-wire channel settings, and compatibility with redundant configurations, the SAI143 is well-suited for safety-critical applications requiring accurate and resilient analog input processing.

Technical Specifications

Applications

• Safety Instrumented Systems (SIS) in oil & gas, petrochemical, and power generation plants

• Redundant and fail-safe process monitoring environments

• Analog signal acquisition for pressure, flow, level, and temperature transmitters

• Distributed control systems with strict safety and reliability requirements

• Integration into ProSafe-RS systems for mission-critical analog input processing

Advantages

• High Channel Density: 16 isolated input channels per module improve I/O efficiency

• Excellent Accuracy: ±16 µA ensures precise signal measurement

• Redundant Design Support: Supports dual-redundant configuration for enhanced system reliability

• Wide Input Range: Accepts up to 25 mA to handle signal overruns safely

• Low Voltage Drop: Maximizes power delivery to field transmitters

• Environmentally Robust: Designed for operation under industrial conditions up to 70°C

• PRM and HART Support: Advanced diagnostics and remote device management (for SAI143-H)

• Flexible Wiring: Supports both 2-wire and 4-wire field instruments

• Modular Integration: Easily fits into existing Yokogawa FIO backplanes

• Strong Isolation: Ensures signal integrity and safety barrier compliance

Frequently Asked Questions (FAQ)

Q1: What type of signals does the SAI143-S03 S1 module accept?

A1: It accepts 4 to 20 mA analog current signals, with a permissible range up to 25 mA.

Q2: How many input channels are available?

A2: The module provides 16 isolated input channels.

Q3: Is HART communication supported in this model?

A3: HART communication is supported only in the SAI143-H variant, not in SAI143-S03 S1.

Q4: What is the input impedance when the module is powered on?

A4: The impedance is 250 Ω plus a current-dependent value.

Q5: What are the module’s dimensions and weight?

A5: The size is 130 x 107.5 x 32.8 mm, and the weight is approximately 0.34 kg.

Q6: Can this module be used in redundant configurations?

A6: Yes, it supports dual-redundant operation for increased safety and availability.

Q7: What is the data update interval?

A7: The module updates input data every 40 milliseconds.

Q8: Does the SAI143-S03 S1 provide a transmitter power supply?

A8: Yes, each channel can supply power to a field transmitter with current-limited output.

Q9: What type of field wiring configurations are supported?

A9: Both 2-wire and 4-wire configurations can be set individually per channel.

Q10: What is the rated accuracy of this module?

A10: The rated accuracy is ±16 microamperes for input ranges from 1 to 23 mA.