Description

The Yokogawa AIP121-S00 is a high-performance analog input processor module designed exclusively for integration into Yokogawa’s ProSafe-RS safety instrumented system (SIS). This critical safety component serves as the primary interface for acquiring analog signals from field sensors and transmitters in safety-critical processes, converting continuous analog measurements into precise digital data for processing by the system’s safety controllers. The Yokogawa AIP121-S00 specializes in handling standard process signals including 4-20 mA current loops and various voltage inputs, which represent vital safety parameters such as overpressure conditions, extreme temperatures, hazardous gas concentrations, and critical flow rates.

As part of Yokogawa’s renowned ProSafe-RS platform, the AIP121-S00 module is engineered to meet the most rigorous safety standards, including SIL 3 (Safety Integrity Level 3) certification according to IEC 61508 and IEC 61511 requirements. The module operates within a redundant architecture that ensures continuous protection even in the event of hardware failures, making it an indispensable component for implementing emergency shutdown systems (ESD), fire and gas detection systems (F&GS), and burner management systems (BMS) in process industries.

The design philosophy behind the Yokogawa AIP121-S00 emphasizes both functional safety and operational reliability. It incorporates advanced diagnostic capabilities that continuously monitor signal integrity, module health, and field wiring conditions, enabling predictive maintenance and preventing undetected dangerous failures. This combination of robust safety features, high availability, and comprehensive diagnostics makes the Yokogawa AIP121-S00 a trusted solution for protecting personnel, equipment, and the environment in the world’s most demanding industrial facilities.

AIP121-S00 YOKOGAWA

Technical Specifications

Parameter Name	Parameter Value
Product Model	AIP121-S00
Manufacturer	Yokogawa Electric Corporation
Product Type	Safety Analog Input Module
Number of Channels	8 channels
Input Signal Types	4-20 mA, 0-20 mA, 0-5V, 0-10V, 1-5V
Resolution	16-bit
Accuracy	±0.1% of full scale
Input Impedance	250 Ω (current input), 1 MΩ (voltage input)
Common Mode Rejection	>120 dB
Normal Mode Rejection	>60 dB
Update Time	≤ 250 ms per channel
Operating Temperature	-40°C to +70°C
Storage Temperature	-40°C to +85°C
Relative Humidity	5% to 95% (non-condensing)
Power Consumption	3.5 W (typical)
Safety Certification	SIL 3 (IEC 61508/61511)

Main Features and Advantages

The Yokogawa AIP121-S00 delivers exceptional safety performance through its fault-tolerant design and comprehensive diagnostic capabilities. The module incorporates hardware and software diagnostics that continuously monitor for field circuit abnormalities including open wires, short circuits, and signal out-of-range conditions. These diagnostics extend to internal component monitoring, ensuring the module itself remains fully functional and capable of performing its safety functions. The module’s design follows fail-safe principles, meaning any detected fault drives the system to a predetermined safe state, preventing undetected dangerous failures that could compromise safety system integrity.

High availability architecture: The Yokogawa AIP121-S00 supports redundant configuration options that maximize system availability while maintaining safety integrity. When deployed in redundant pairs, the module ensures continuous safety protection even during maintenance or module replacement operations. This hot standby capability allows for online maintenance without necessitating a process shutdown, significantly reducing operational downtime while maintaining continuous safety coverage. The module’s design also includes robust electrical isolation between channels and from the system bus, protecting against ground loops and electrical noise that could affect measurement accuracy.

Configuration flexibility and integration: The Yokogawa AIP121-S00 offers extensive configuration options through Yokogawa’s dedicated engineering tools. Each channel can be individually configured for different signal types, measurement ranges, alarm setpoints, and filtering parameters. The module seamlessly integrates with the ProSafe-RS system architecture, providing consistent performance and simplified engineering throughout the safety lifecycle. Its compatibility with Yokogawa’s extensive range of safety system components allows for streamlined system design, installation, and maintenance, reducing overall project costs and complexity while ensuring the highest levels of safety performance.

Application Field

The Yokogawa AIP121-S00 is deployed across multiple high-hazard industries where safety instrumented systems are mandatory for risk reduction. In oil and gas facilities, the module serves in critical applications including emergency shutdown systems on offshore platforms, pipeline emergency valve closure systems, and fire and gas detection systems in refineries. The Yokogawa AIP121-S00 acquires signals from pressure transmitters, temperature sensors, and gas detectors that monitor conditions which, if left uncontrolled, could lead to catastrophic events including fires, explosions, or toxic releases.

Petrochemical and chemical processing plants utilize the Yokogawa AIP121-S00 in reactor protection systems, distillation column safety systems, and storage area emergency controls. The module’s high accuracy and reliability ensure that safety interventions occur precisely when process parameters exceed safe operating limits, preventing runaway reactions, equipment damage, and environmental incidents. In power generation, particularly in nuclear and conventional thermal power plants, the module provides safety-critical monitoring of turbine systems, boiler pressures, and emergency cooling systems where measurement reliability is paramount.

The Yokogawa AIP121-S00 also finds application in other process industries including pharmaceutical manufacturing, where batch processes require strict safety controls, and in metallurgical operations for furnace protection systems. In each application, the module solves the fundamental challenge of acquiring analog process signals with absolute reliability and integrity, forming the measurement foundation for safety functions that protect human life, environmental assets, and capital equipment.

AIP121-S00 YOKOGAWA

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