Yokogawa AAV142 Analog Input Module

The Yokogawa AAV142 Analog Input Module serves as a critical interface in Yokogawa’s CENTUM distributed control system. Designed to convert analog signals from field instruments—such as current loops, voltage outputs, and thermocouple temperature sensors—into high‑precision digital data, this module ensures accurate, reliable measurement for process control. The AAV142 is engineered for robustness, stability, and immunity to electrical noise in demanding industrial environments. It offers seamless integration into CENTUM VP and CS platforms and is suitable for diverse applications in petrochemical, power, water treatment, pharmaceutical, and manufacturing industries.

Product Specifications

Product Applications

• Oil and Gas Production & Refining: Monitor pressure, temperature, and flow parameters for safe and efficient operations.

• Chemical and Petrochemical Plants: Acquire critical analog data for batch and continuous process control.

• Power Generation Facilities: Track boiler and turbine variables, environmental sensors, and emissions instrumentation.

• Water & Wastewater Treatment: Capture data from pH, chlorine, turbidity, and flow sensors for process optimization.

• Pharmaceutical Manufacturing: Support stringent control in sterile operations by accurate sensor data acquisition.

• Food & Beverage Processing: Integrate with quality control sensors (e.g. temperature, pressure, flow) along production lines.

Product Advantages

• High Precision with Repeatable Accuracy: ±0.1 % FS ensures consistency and dependable control data.

• Versatile Signal Support: Accepts current, voltage, and multiple thermocouple types, reducing the need for multiple module types.

• Robust Noise Rejection: Isolation design mitigates electrical interference, preserving signal integrity in harsh environments.

• Compact and Space-Efficient: Enables high-density rack installations within control cabinets.

• Reliable Under Harsh Conditions: Operates consistently across wide temperature ranges and in electrically noisy installations.

• Seamless Integration into Yokogawa Systems: Plug-and-play compatibility with CENTUM VP and CS for straightforward installation and maintenance.

FAQ

1. What thermocouple types are supported by the AAV142 module?

   It supports Types K, J, T, E, R, S, B, and N.

2. Can each channel handle either current or voltage inputs?

   Yes, each channel can be configured independently for either 4–20 mA or 0–10 V signals.

3. What is the specified input accuracy of the module?

   The accuracy is specified as ±0.1 % of full-scale input.

4. How fast does the module perform ADC conversion?

   Typical response time is approximately 100 milliseconds per channel.

5. What isolation mechanisms safeguard signal integrity?

   The module incorporates galvanic isolation between individual channels and between channels and earth ground.

6. What power supply is required for the AAV142?

   It is powered by a standard 24 V DC supply provided via the host control rack.

7. Is it safe to hot-swap this module during operation?

   No, the AAV142 must not be removed or inserted while the system is live; power down the host system before replacement.

8. What environmental temperature range can it operate in?

   Continuous operation is guaranteed from –10 °C to +55 °C.

9. Is the module compatible with non‑Yokogawa control systems?

   It is designed specifically for CENTUM VP and CENTUM CS; use with other systems may not be supported.

10. What occurs if input signals exceed the rated range?

    Signals outside the defined ranges may yield errors or damage; appropriate signal conditioning is required to prevent this.