Yokogawa SAI143-H33 ProSafe-RS Analog Input Module

Product Overview

The Yokogawa SAI143-H33 serves as a high-integrity analog input interface designed specifically for the ProSafe-RS Safety Instrumented System (SIS). This module accepts 16 channels of 4 to 20 mA signals from field transmitters, providing the vital data link for Safety Integrity Level 3 (SIL3) applications. By integrating sophisticated self-diagnostics and channel-to-channel isolation, the SAI143-H33 ensures process safety in emergency shutdown (ESD) and fire and gas (F&G) systems. We supply this unit in 100% Brand New and Original condition to guarantee the highest safety performance.

Part Number Breakdown

Technical Specifications

• Channels: 16 channels, fully isolated.

• Input Signal: 4 to 20 mA DC.

• Safety Integrity Level: SIL3 certified (when used in redundant configuration).

• HART Support: Enables bidirectional digital communication over analog loops.

• Dimensions: 2.5 cm x 12.7 cm x 12.7 cm.

• Weight: 0.4 kg.

• Origin: USA.

• Power Consumption: Max 450 mA (24 V DC).

Engineering Advantages

• Achieve SIL3 Safety Standards: The SAI143-H33 features internal redundant circuitry and continuous self-testing. It detects internal hardware failures and signal discrepancies instantly, triggering safe-state logic to protect personnel and high-value assets.

• Simplify Field Device Maintenance: Integrated HART protocol support allows engineers to perform remote diagnostics and valve signature analysis through the safety rack. This functionality removes the need for technicians to enter hazardous areas for routine instrument checks, directly reducing operational risk.

• Superior Environmental Resilience: The "H33" designation indicates high-grade hardware protection. This module withstands corrosive atmospheres (Class G3) often found in refineries and chemical plants, preventing silver and copper corrosion on the PCB and extending the module’s lifecycle.

• Compact High-Density Design: Measuring only 2.5 cm in width, this module maximizes I/O density within the safety nest. This compact footprint allows for more safety loops per cabinet, significantly reducing the total cost of marshalling and enclosure requirements.

FAQs

• Does the SAI143-H33 support redundant configurations?

  Yes. For SIL3 applications, you typically install these modules in redundant pairs. The ProSafe-RS architecture automatically manages the data synchronization between the active and standby units to ensure zero downtime.

• Can I use this module for non-safety control tasks?

  While technically possible, the SAI143-H33 is specifically engineered and certified for safety applications. For standard process control without safety requirements, the AAI143 series offers a more cost-effective alternative.

• What type of terminal board does this module require?

  The SAI143-H33 interfaces with specific ProSafe-RS terminal boards via KS cables. We recommend verifying your terminal board model (e.g., SEA4D) to ensure complete compatibility with the 16-channel isolated input structure.

• How do I verify the "Brand New" status?

  We ship all units in original Yokogawa factory packaging, featuring intact security seals and original serial numbers. This ensures you receive a product that has never been installed or refurbished, maintaining the integrity of your safety system.