Description

The Yokogawa AIP171 is a high-density, high-reliability analog input module designed for integration into Yokogawa’s Centum VP distributed control system (DCS). This advanced module serves as a critical signal acquisition component in process automation, providing precise conversion of analog field signals into digital data for process monitoring and control. The Yokogawa AIP171 specializes in handling various analog signal types from field instruments including 4-20 mA current signals, thermocouple inputs, RTD temperature sensors, and voltage signals, making it exceptionally versatile for diverse process measurement applications. Its primary function is to ensure accurate and reliable data acquisition for critical process variables such as temperature, pressure, flow, and level across continuous process operations.

As part of Yokogawa’s flagship Centum VP platform, the Yokogawa AIP171 embodies the company’s commitment to precision, reliability, and operational excellence in industrial automation. The module is engineered to meet the demanding requirements of modern process industries, providing stable and accurate measurement data that forms the foundation for advanced process control, optimization, and safety interventions. Its design incorporates Yokogawa’s proprietary technologies for noise immunity, signal conditioning, and temperature compensation, ensuring consistent performance even in electrically noisy industrial environments with fluctuating ambient conditions.

The Yokogawa AIP171 features advanced diagnostic capabilities and communication functions that enhance system reliability and facilitate predictive maintenance strategies. With its high channel density and flexible configuration options, the module offers significant space and cost savings in control system architecture while maintaining the high standards of accuracy and reliability expected from Yokogawa equipment. Its robust construction and designed-in reliability make it suitable for deployment in various industrial environments, from temperature-controlled control rooms to harsh factory floors where consistent performance is essential for maintaining continuous production processes.

AIP171 YOKOGAWA

Technical Specifications

Parameter Name	Parameter Value
Product Model	AIP171
Manufacturer	Yokogawa Electric Corporation
Product Type	Analog Input Module
Number of Channels	16 channels
Input Signal Types	4-20 mA, TC (K, J, R, S, B, E, T, N), RTD (Pt100, JPt100), 0-5V, 1-5V, 0-10V
Resolution	24-bit (for analog-to-digital conversion)
Accuracy	±0.01% of span (for voltage/current), ±0.1°C (for temperature)
Input Impedance	1 MΩ (voltage inputs), 250 Ω (current inputs)
Common Mode Rejection	>120 dB at 50/60 Hz
Normal Mode Rejection	>60 dB at 50/60 Hz
Conversion Time	250 ms per channel (maximum)
Operating Temperature	0°C to 60°C
Storage Temperature	-40°C to 85°C
Relative Humidity	5% to 95% (non-condensing)
Power Consumption	4.2 W (typical)
Isolation	Channel-to-channel isolation, 500 V AC

Main Features and Advantages

The Yokogawa AIP171 offers exceptional measurement precision and versatility through its advanced signal processing architecture. The module’s 24-bit analog-to-digital conversion capability provides superior resolution, enabling detection of minute process changes that might be missed by lower-resolution modules. This high resolution is particularly valuable for temperature measurement applications where precise control is critical to product quality and process efficiency. The Yokogawa AIP171 supports a wide range of sensor types without requiring additional signal conditioners, significantly simplifying system design and reducing installation costs while maintaining Yokogawa’s renowned measurement accuracy.

Enhanced diagnostic capabilities represent a significant advantage of the Yokogawa AIP171. The module continuously monitors its own health and the integrity of connected field devices, providing early detection of potential issues such as wire breakage, short circuits, sensor degradation, and signal drift. These comprehensive diagnostics are communicated to the control system, enabling predictive maintenance and reducing unexpected downtime. The module’s robust electrical isolation protects both the control system and field instruments from electrical disturbances, enhancing overall system reliability and extending the lifespan of connected equipment.

Configuration flexibility and integration ease are hallmarks of the Yokogawa AIP171. Each channel can be individually configured for different signal types and measurement ranges through Yokogawa’s intuitive engineering tools, allowing a single module type to serve multiple measurement purposes throughout a facility. The module seamlessly integrates with the Centum VP system architecture, providing consistent performance and simplified engineering throughout the system lifecycle. Its hot-swappable design enables maintenance and replacement without system shutdown, significantly reducing maintenance downtime while maintaining process availability.

Application Field

The Yokogawa AIP171 finds extensive application across various process industries where reliable and precise analog signal acquisition is essential for automated control and monitoring. In chemical and petrochemical plants, the module is employed to monitor critical parameters such as reactor temperatures, distillation column pressures, and flow rates of raw materials and finished products. The high accuracy and multiple sensor support of the Yokogawa AIP171 make it particularly valuable in these environments where precise temperature control often determines product quality and process safety.

In oil and gas production and refining, this analog input module is utilized in both upstream and downstream operations. It serves in measurement applications ranging from wellhead temperature monitoring to refinery process control, where its robust design withstands challenging environmental conditions while providing dependable performance. The module’s extensive electrical isolation and noise immunity characteristics make it particularly valuable in these environments, where electrical interference can compromise measurement accuracy and potentially affect process safety.

Power generation facilities represent another significant application area for the Yokogawa AIP171. In thermal, nuclear, and renewable energy plants, the module acquires signals from sensors monitoring turbine performance, boiler conditions, and various auxiliary systems. The pharmaceutical and food processing industries also extensively use this module for precise temperature control in sterilization processes, fermentation, and product formulation where regulatory compliance demands accurate and verifiable measurement data. In each of these applications, the Yokogawa AIP171 provides the reliable signal acquisition necessary for process optimization, quality control, and equipment protection.

AIP171 YOKOGAWA

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