YOKOGAWA AAI135-H03 DCS Analog Input Module(with HART Protocol)

Description

YOKOGAWA AAI135-H03 DCS Analog Input Module(with HART Protocol)

Product Dimensions：

The Yokogawa AAI135-H03 is an unisolated 16-channel analog input module designed for Yokogawa’s flagship CENTUM VP and CENTUM CS 3000 Distributed Control Systems (DCS). It converts standard industrial current signals into digital values for high-density monitoring and control.

Detailed Description

The AAI135-H03 module installs directly into Field Control Unit (FCU) node units or I/O expansion subracks. It accepts 4 to 20 mA DC current signals from process transmitters and features built-in HART protocol communication capability (-H suffix). This allows bidirectional digital signal pass-through between smart field instruments and asset management software (such as Yokogawa PRM) directly over existing analog wiring.

Technical Parameters

Product Advantages

• High Density: 16 channels per module saves backplane slot space and panel footprint in high-I/O-count control rooms.
• Integrated HART Pass-Through: Enables remote commissioning, diagnostics, parameter tuning, and health checks of connected smart field devices without extra multiplexers.
• Dual-Redundancy Option: Supports dual-redundant pairing to ensure continuous, uninterrupted process monitoring in safety-critical loops.
• Hot-Swappable: Can be removed and replaced while the control unit is online and under power, minimizing maintenance downtime.
• Fast Data Conversion: Features a rapid 10 ms update rate suitable for fast-acting closed-loop control applications.

Important Considerations & Precautions

• Unisolated Channels: Because channels share a common negative potential (unisolated between channels), ensure field transmitter ground loops are properly isolated. Ground potential differences between field sensors can cause signal distortion.
• Transmitter Powering: The module is an input receiving module. For 2-wire transmitters, ensure an external 24 V DC transmitter power supply or dedicated power distribution module (e.g., Yokogawa AAD135) is incorporated into the loop circuit.
• HART Loop Impedance: Maintain a minimum loop resistance of 250 \ \Omega to ensure reliable HART frequency-shift keying (FSK) signal transmission.
• Terminal Block Compatibility: Verify match between module suffix and connection interface (e.g., pressure-clamp terminal block vs. 40-pin KS cable connector).

Product Applications

The AAI135-H03 is deployed across continuous process control facilities using Yokogawa CENTUM systems:

• Refining & Petrochemicals: Monitoring pressure, temperature, and differential flow transmitters across distillation columns and cracker units.
• Offshore Oil & Gas Platforms: Collecting process measurements from separator vessels and wellhead manifolds into redundant FCS units.
• Power Generation Plants: Feedwater flow tracking, steam drum level monitoring, and turbine auxiliary parameter processing.
• Chemical Processing: Multi-reactor parameter monitoring requiring real-time HART diagnostics via Yokogawa Plant Resource Manager (PRM).

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

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