Yokogawa AAI135-H53 Analog Input Module

Product Introduction

The Yokogawa AAI135-H53 Analog Input Module is a high-performance, 16-channel analog input module designed for use in CENTUM VP and ProSafe-RS systems. This module is part of Yokogawa’s highly reliable input/output family, developed to meet the requirements of safety and critical process control environments.

The AAI135-H53 supports 4–20 mA current input signals and is equipped with HART communication capability, allowing for bidirectional digital communication alongside analog signal transmission. It is suitable for applications demanding high signal accuracy, galvanic isolation, and functional safety compliance. As a safety-instrumented system (SIS) compatible module, it is designed for SIL2/SIL3-rated applications, making it a dependable choice for industries where safety is paramount.

Product Specifications

Product Applications

The AAI135-H53 is designed for demanding industrial applications where precision, diagnostics, and safety are essential. It is typically deployed in:

• Oil & Gas: Wellhead pressure monitoring, pipeline flow measurement, offshore platform automation.

• Chemical & Petrochemical: Acquisition of critical process variables such as pH, temperature, and tank levels.

• Power Generation: Input interface for steam turbines, boilers, and distributed control of auxiliary systems.

• Pharmaceuticals: Input collection for GMP and FDA-compliant production environments.

• Water Treatment: Accurate monitoring of flow, chemical dosing, and filtration parameters.

• Pulp and Paper: Process control of digesters, bleach plants, and chemical recovery systems.

Product Advantages

• SIL2/SIL3 Certified: Approved for use in high-integrity safety systems under IEC 61508.

• Full HART Communication Support: Enables enhanced field device management, diagnostics, and configuration.

• High-Density Channel Count: 16 input channels minimize footprint and reduce installation cost.

• Channel Isolation: Prevents crosstalk and improves system robustness in electrically noisy conditions.

• Comprehensive Diagnostic Features: Immediate detection of open wires, over-range inputs, and loop faults.

• Precision Measurement: 16-bit resolution ensures reliable, stable input under all load conditions.

• Temperature and Humidity Resilience: Designed to function in extreme industrial environments.

• Seamless System Integration: Natively supported by Yokogawa CENTUM VP and ProSafe-RS DCS platforms.

FAQ

1. Does the AAI135-H53 support configuration through Yokogawa’s PRM (Plant Resource Manager)?
   Yes, the module supports configuration and diagnostics via PRM, enabling access to HART device parameters.

2. Can each channel support simultaneous analog and digital communication?
   Yes, HART enables simultaneous analog signal transmission and digital diagnostics per channel.

3. Is there redundancy support in this model?
   Yes, when installed in a redundant I/O configuration, this module supports redundant signal processing.

4. What is the input loop impedance, and why does it matter?
   The input impedance is 250 Ω, critical for proper current loop operation and HART communication.

5. How are faults communicated to the control system?
   The module uses status flags, system alarms, and error codes visible in the engineering workstation.

6. Does this module allow live hot-swap during operation?
   No, it must be removed or installed with the system powered down to avoid potential disruptions.

7. Can HART communication be disabled per channel?
   Yes, HART can be enabled or disabled per channel depending on configuration requirements.

8. Is there a built-in self-test mechanism?
   Yes, the module performs continuous diagnostics and loop health monitoring.

9. Can this module operate in environments with explosive gases?
   Yes, with appropriate system certifications (ATEX, CSA), it can be used in Zone 2 environments.

10. Is external signal conditioning required for other input types?
    Yes, only 4–20 mA signals are accepted; voltage or thermocouple signals require conditioning.

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FAQ

1. Does the AAI135-H53 support configuration through Yokogawa’s PRM (Plant Resource Manager)?
   Yes, the module supports configuration and diagnostics via PRM, enabling access to HART device parameters.

2. Can each channel support simultaneous analog and digital communication?
   Yes, HART enables simultaneous analog signal transmission and digital diagnostics per channel.

3. Is there redundancy support in this model?
   Yes, when installed in a redundant I/O configuration, this module supports redundant signal processing.

4. What is the input loop impedance, and why does it matter?
   The input impedance is 250 Ω, critical for proper current loop operation and HART communication.

5. How are faults communicated to the control system?
   The module uses status flags, system alarms, and error codes visible in the engineering workstation.

6. Does this module allow live hot-swap during operation?
   No, it must be removed or installed with the system powered down to avoid potential disruptions.

7. Can HART communication be disabled per channel?
   Yes, HART can be enabled or disabled per channel depending on configuration requirements.

8. Is there a built-in self-test mechanism?
   Yes, the module performs continuous diagnostics and loop health monitoring.

9. Can this module operate in environments with explosive gases?
   Yes, with appropriate system certifications (ATEX, CSA), it can be used in Zone 2 environments.

10. Is external signal conditioning required for other input types?
    Yes, only 4–20 mA signals are accepted; voltage or thermocouple signals require conditioning.

Related Models (Same Series or Functional Equivalents)

Popular Yokogawa Models (Same Brand)

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