Description

The Yokogawa AIP591 represents the cutting edge of safety analog input technology, designed exclusively for integration into Yokogawa’s ProSafe-RS safety instrumented system (SIS). This advanced safety module provides critical signal acquisition capabilities for the most demanding safety applications in process industries. The Yokogawa AIP591 specializes in processing high-resolution analog signals from field transmitters, handling 4-20 mA current inputs with exceptional accuracy and reliability. As a vital component in safety loops, this module continuously monitors critical process parameters including pressure, temperature, flow, and level, providing the essential data required for safety system decisions that protect personnel, equipment, and the environment.

Engineered to meet the most rigorous international safety standards, the Yokogawa AIP591 achieves Safety Integrity Level (SIL) 3 certification according to IEC 61508 and IEC 61511 requirements. The module incorporates Yokogawa’s latest advancements in safety technology, featuring enhanced diagnostic capabilities that monitor both internal hardware integrity and field circuit conditions. This comprehensive diagnostic coverage ensures early detection of potential failures, maintaining the safety function’s integrity and preventing undetected dangerous failures. The Yokogawa AIP591 is designed for mission-critical applications where the highest levels of safety availability and reliability are required.

The module’s advanced architecture includes robust electrical isolation, noise immunity, and fault-tolerant design principles that ensure continuous operation even in challenging industrial environments. With its hot-swappable capability and support for redundant configurations, the Yokogawa AIP591 enables maintenance and module replacement without compromising system availability or safety integrity. The module seamlessly integrates with Yokogawa’s engineering tools, simplifying configuration, commissioning, and ongoing maintenance while providing comprehensive documentation for safety lifecycle management.

AIP591 YOKOGAWA

Technical Specifications

Parameter Name	Parameter Value
Product Model	AIP591
Manufacturer	Yokogawa Electric Corporation
Product Type	Safety Analog Input Module
Number of Channels	16 channels
Input Signal Type	4-20 mA
Resolution	24-bit
Accuracy	±0.05% of full scale
Input Impedance	250 Ω
Update Time	100 ms per channel (maximum)
Common Mode Rejection	>140 dB at 50/60 Hz
Normal Mode Rejection	>80 dB at 50/60 Hz
Operating Temperature	-40°C to +70°C
Storage Temperature	-40°C to +85°C
Relative Humidity	5% to 95% (non-condensing)
Power Consumption	4.5 W (typical)
Safety Certification	SIL 3 (IEC 61508/61511)
Isolation	1500 V AC channel-to-channel isolation

Main Features and Advantages

The Yokogawa AIP591 sets new standards in safety analog input technology with its unprecedented combination of high channel density and superior performance characteristics. The module’s 24-bit resolution provides exceptional measurement precision, enabling detection of minute process changes that might indicate developing hazardous conditions. This high resolution, combined with Yokogawa’s advanced signal processing algorithms, ensures that safety systems receive the most accurate process information available, enabling earlier intervention and enhanced safety performance. The Yokogawa AIP591 represents a significant advancement in measurement technology for safety applications.

Enhanced diagnostic intelligence: The Yokogawa AIP591 incorporates Yokogawa’s most advanced diagnostic suite, providing comprehensive monitoring of both module health and field circuit integrity. The module continuously performs self-diagnostics for internal hardware components while simultaneously monitoring field connections for open circuits, short circuits, signal drift, and other abnormalities. These diagnostics extend to predictive capabilities that can identify developing issues before they affect safety functionality. The module’s built-in HART communication capability allows for additional device diagnostics and configuration, further enhancing the overall safety system’s intelligence and maintenance capabilities.

Operational excellence and integration: The Yokogawa AIP591 offers exceptional operational flexibility through its support for various configuration modes and redundant architectures. The module’s high channel density provides significant space and cost savings in safety system design while maintaining the highest safety integrity levels. Seamless integration with Yokogawa’s ProSafe-RS engineering environment simplifies configuration, commissioning, and maintenance activities, reducing engineering costs and minimizing the potential for human error. The module’s hot-swappable design and support for online maintenance ensure maximum system availability while maintaining continuous safety protection.

Application Field

The Yokogawa AIP591 is deployed in the most critical safety applications across high-hazard process industries worldwide. In offshore oil and gas production platforms, the module serves as the primary analog interface for emergency shutdown systems, fire and gas detection systems, and process shutdown applications. The Yokogawa AIP591 provides reliable monitoring of wellhead pressures, separator levels, and gas detection concentrations where failure could lead to catastrophic environmental and safety incidents. Its robust design and high immunity to electrical noise make it particularly suited for the challenging environments encountered in offshore applications.

Petrochemical and chemical manufacturing facilities utilize the Yokogawa AIP591 for reactor protection systems, high-integrity pressure protection systems (HIPPS), and critical distillation column safety controls. The module’s high accuracy and resolution ensure precise measurement of process variables that determine safe operating limits, enabling reliable safety interventions before hazardous conditions develop. In power generation, particularly in nuclear facilities and combined-cycle power plants, the Yokogawa AIP591 provides safety-critical monitoring of turbine systems, boiler conditions, and emergency core cooling systems where measurement reliability directly impacts public safety.

The pharmaceutical and specialty chemical industries also benefit from the Yokogawa AIP591‘s capabilities for batch process safety applications where precise temperature and pressure control are critical to product quality and process safety. In each application, the module provides the reliable signal acquisition necessary for implementing effective safety functions that protect human life, environmental assets, and capital equipment while ensuring regulatory compliance and operational excellence.

AIP591 YOKOGAWA

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