Yokogawa AAI135-H00/K4A00 Analog Input Module

The Yokogawa AAI135-H00/K4A00 is a high-performance 16-channel analog input module engineered for integration within the CENTUM VP and ProSafe-RS distributed control systems (DCS). Designed to deliver precision, reliability, and high-speed signal acquisition, the AAI135-H00/K4A00 supports analog inputs such as 4–20 mA and voltage signals, making it suitable for a wide range of industrial process applications.

The module features high-resolution A/D conversion, galvanic isolation, and advanced diagnostic features that enhance its functionality in mission-critical control environments. It supports HART communication, allowing for simultaneous analog signal processing and digital device parameter reading.

Product Specifications

Product Applications

The AAI135-H00/K4A00 is widely used in various process industries where stable and accurate analog input data acquisition is critical. Its robust design and multi-protocol capabilities make it ideal for:

• Oil & Gas: Monitoring pressure, flow, and temperature sensors in upstream and downstream facilities

• Power Generation: Gathering analog values from turbines, boilers, and auxiliary systems

• Chemical & Petrochemical: Reading critical tank level, pH, and flow data in hazardous zones

• Water & Wastewater: Integration into SCADA/DCS systems for real-time monitoring

• Pharmaceuticals: Validated analog acquisition in GMP-compliant process automation

• Pulp & Paper: Reliable input for complex control loops in continuous manufacturing

Product Advantages

• High Channel Density: Accommodates up to 16 analog input channels per module, optimizing cabinet space.

• HART Communication Support: Enables simultaneous analog and digital communication, reducing wiring and increasing diagnostics capability.

• Advanced Diagnostics: Features built-in functions for wire break detection, over-range, and system error alarms.

• High Accuracy & Resolution: 16-bit A/D ensures precise signal digitization for tight process control.

• Robust Isolation: Electrical isolation between channels and system ground enhances signal integrity and system safety.

• Seamless Integration: Fully compatible with Yokogawa CENTUM VP and ProSafe-RS systems for streamlined configuration and maintenance.

FAQ

1. Does the AAI135-H00/K4A00 support redundant configurations?

   Yes, it supports redundant input channels when paired with appropriate I/O bases and configurations in CENTUM VP.

2. Can I use voltage signals directly with this module?

   No, the AAI135-H00/K4A00 is primarily designed for current (4–20 mA) input; using voltage inputs requires signal conversion.

3. What is the input impedance of the analog channels?

   The input impedance is typically 250 Ω per channel to accommodate standard 4–20 mA loops.

4. Is HART communication enabled on all channels?

   Yes, HART is supported on all 16 channels, provided proper wiring and settings are configured in the system.

5. How does the module handle open-circuit detection?

   The module includes diagnostics to detect wire breaks or disconnections in 4–20 mA loops and generates system alarms.

6. What is the update rate for each channel?

   The standard input scan time is around 100 ms per channel, which can vary depending on system load.

7. Is channel-to-channel isolation provided?

   Yes, the module provides galvanic isolation between individual channels to reduce signal interference.

8. Can this module be used in SIL-rated safety applications?

   Yes, when used within the Yokogawa ProSafe-RS system, it is suitable for SIL2/SIL3 applications depending on configuration.

9. Are there limitations to mixing HART and non-HART devices?

   No, the module can communicate with both HART-enabled and conventional 4–20 mA devices simultaneously.

10. Is configuration required before commissioning?

    Yes, the module must be configured using Yokogawa’s system software (such as PRM or SENG) before becoming operational.