Yokogawa SAI143-S33 ProSafe-RS Analog Input Module

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Manufacturer: Yokogawa
Product No.: SAI143-S33
Country of origin:Japan
Product Type: Analog Input Module
Barcode: 8537101190
Payment: T/T, Western Union
Weight: 340g
Dimensions: 32.8 mm x 130 mm x 107.5 mm
Shipping port: Xiamen
Warranty: 12 months

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

Model	Suffix Codes	Description
SAI143		Analog Input Module (4 to 20 mA, 16 channels, module isolation)
	-S	Standard type
	3	For pressure clamp terminal block or MIL cable with no explosion protection
	3	With ISA Standard G3 and temperature (-20 to 70 degC)

Technical Specifications

Item	Specifications
Manufacturer	Yokogawa Electric Corporation
Model	SAI143-S33
Number of Input Channels	16 channels, module isolation
Rated Input Range	4 to 20 mA
Permissible Input Range	0 to 25 mA
Input Impedance (Power-ON)	250 Ohm + Voltage drop in the input protection circuit inside the module / Current value
Input Impedance (Power-OFF)	500 Ohm minimum
Maximum Voltage Drop	0.45 V (in the input protection circuit)
Rated Accuracy	±16 uA (Input range 1 to 23 mA for Style S3)
Data Update Frequency	40 ms
Temperature Drift	±16 uA/10 degC
Transmitter Power Supply	16.15 V minimum (at 20 mA), 26.4 V maximum (at 0 mA)
Output Current Limit	25 mA
Withstand Voltage	1.5 kV AC between input signal and system for 1 minute
Maximum Current Consumption	5 V system: 320 mA, 24 V system: 550 mA
Ambient Temperature	-20 to 70 degC
Environmental Code	ISA Standard G3
Weight	Approx. 0.34 kg (For pressure clamp terminal block or MIL cable)
Dimensions (W x H x D)	32.8 mm x 130 mm x 107.5 mm (For pressure clamp and MIL cable)

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.

Key Features:

#Analog Input Module #Yokogawa ProSafe-RS

Product Documentation

Technical Datasheet (PDF) Complete specifications and technical drawings.

Can Zener barriers be connected directly to the module?

No, Zener barriers cannot be connected to this module. An isolation barrier must be used when an intrinsically safe instrumented system is required.

What is the purpose of the transmitter power supply ON/OFF function?

This function allows the module to turn off the transmitter power supplied to all 16 channels simultaneously under a 2-wire setting, which enables resetting the alarm state of Fire and Gas devices.

How is the 2-wire or 4-wire mode configured on the module?

The 2-wire or 4-wire operational mode is set individually for each channel using dedicated physical setting pins on the module.

Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

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Yokogawa SAI143-S33 ProSafe-RS Analog Input Module