Yokogawa SAI143-S33 ProSafe-RS Analog Input Module

Description

The Yokogawa SAI143-S33 is a high-reliability current input module designed for mounting on the safety node unit and safety control unit within the ProSafe-RS safety instrumented system. This module plays a critical role in safety functions by inputting 4 to 20 mA signals from field instruments directly into the Safety Control Station (SCS). It supports dual-redundant configurations to achieve enhanced system availability and fault tolerance. The SAI143-S33 features standard individual channel configuration pins for 2-wire or 4-wire transmitters and provides module isolation for its 16 processing channels.

Features

• Dual Redundancy: Supports full dual-redundant configuration to eliminate single points of failure in safety-critical applications.
• Flexible Sensor Hookup: Individual channel setting via pins to accommodate both 2-wire and 4-wire field transmitter arrangements.
• Simultaneous Power Management: Built-in transmitter power supply ON/OFF function across all 16 channels simultaneously, facilitating alarm resets for Fire and Gas devices.
• Robust Isolation: Delivers module-level galvanic isolation protecting internal system electronics from hazardous field transients.

Applications

• Safety Instrumented Systems (SIS) 
• Emergency Shutdown Systems (ESD)
• Fire and Gas (F&G) System integration and device resetting 
• Process industry safety monitoring and critical current loop sourcing 

Ordering Information

Technical Specifications

Installation Guidelines

• Module Siting: Mount the current input module onto a compatible safety node unit or safety control unit chassis.
• Redundancy Setup: When implementing dual-redundant pairs, order an additional tracking module with identical technical specifications but without specific optional suffix accessories.
• Safety Isolation Barriers: Do not connect Zener barriers directly to this hardware. Utilize an approved isolation barrier when deploying an intrinsically safe instrumented loop.
• False Insertion Prevention: When deploying option /PRP, utilize the specified matching field signaling cable variant equipped with the corresponding option /SAI143 to ensure functional physical key alignment.

Compliance and Certifications

• ISA Standard G3: Certified for installation within corrosive industrial environments meeting the G3 severity specifications.