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AAI143-S53 S1

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The YOKOGAWA AAI143-S53 S1 is a isolated analog input module designed for the CENTUM VP and CS 3000 DCS, providing 16 channels of reliable 4-20mA signal acquisition. This module ensures signal integrity with channel-to-channel isolation, making it ideal for critical process monitoring in demanding industrial environments.
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Technical specifications for AAI143-S53 S1

  • Manufacturer:
    Yokogawa
  • Part Number:
    AAI143-S53 S1
  • Product Family:
    Centum CS-Centum VP
  • Product Type:
    Analog Input Module
  • Number of channels:
    16, isolated
  • Input signal:
    4 to 20 mA DC
  • Allowable input current:
    24 mA
  • Input resistance (Power ON):
    270 Ω (20 mA) to 350 Ω (4 mA)
  • Input resistance (Power OFF):
    500 kΩ or higher
  • Accuracy:
    ±16 μA
  • Data update period:
    10 ms
  • 2-wire/4-wire setting:
    Per channel via setting pin
  • Drift due to temperature:
    ±16 μA/10°C
  • Max current consumption:
    230 mA (5 V DC), 540 mA (24 V DC)
  • Operating temperature:
    -20°C to +60°C
  • Weight:
    0.24 kg
  • Estimated shipping dimensions:
    13x3.4x10.8cm
  • Tariff Code:
    8537101190
  • Country of origin:
    Japan
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Applications Safety & Compliance Firmware & Updates

Features:

  • Full Channel-to-Channel Isolation for Signal Integrity
  • Built-in Transmitter Power Supply Simplifies Field Wiring
  • Fast 10ms Data Update for Real-Time Control
The YOKOGAWA AAI143-S53 S1 provides complete isolation between input channels and between inputs and the system. This design eliminates ground loops, prevents cross-channel interference, and ensures accurate measurement even in electrically noisy industrial environments, reducing troubleshooting time and improving system reliability.

Each channel of the YOKOGAWA AAI143-S53 S1 can power a 2-wire transmitter directly, delivering 19.0V at 20mA with overcurrent protection. This eliminates the need for external power supplies for most field devices, reducing cabinet space, wiring complexity, and overall installed cost.

With a 10ms data refresh rate and 100ms step response time, the YOKOGAWA AAI143-S53 S1 is optimized for fast-responding control loops. This ensures that critical process variables are updated quickly, enabling tighter control and faster alarm response in applications such as flow and pressure regulation.

The AAI143-S53 S1 YOKOGAWA solated 16-Channel 4-20mA Analog Input Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
YOKOGAWA AAI143-S53 S1 Isolated 16-Channel 4-20mA Analog Input Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
YOKOGAWA AAI143-S53 S1 Isolated 16-Channel 4-20mA Analog Input Module

General

  • Manufacturer YOKOGAWA
  • Model AAI143-S53 S1
  • Condition New Original ready stock
  • Product Family AAI143-H50 S1,AAI143-H53 S1,AAI143-S03 S1
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Refineries and Petrochemical Plants – Monitors 4-20mA signals from pressure, temperature, and flow transmitters in critical process units.
  • Power Generation – Acquires analog signals from boiler controls, turbine monitoring, and emissions systems with high noise immunity.
  • Water and Wastewater Treatment – Connects to level, pH, and flow sensors across distributed pump stations and treatment trains.
  • Oil & Gas Offshore Platforms – Provides reliable, isolated input channels in corrosive environments (ISA G3 option included), reducing maintenance from salt and humidity.
  • No Zener Barrier Permitted – For intrinsic safety, the module requires an isolation barrier, not a Zener barrier, as clearly specified in Yokogawa documentation.
  • Withstanding Voltage – Rated at 1500V AC for 1 minute between input and system, ensuring operator and equipment safety during fault conditions.
  • ISA Standard G3 Option (Suffix 3) – The S53 version includes corrosion resistance protection, making it suitable for harsh atmospheres with airborne contaminants.
  • Redundancy for Process Safety – Dual-redundant configuration support allows the module to be used in control loops that require high availability, reducing the risk of unplanned shutdowns.
  • No Field Firmware Updates for Base Function – The module's core analog input function is hardware-based and does not require user-applied firmware updates.
  • HART Communication Requires EB401 Update – To enable HART on this module, ensure the ER bus node unit's EB401 firmware is revision 2 or later.
  • Compatible Control Software – Works with LFS1700 (AFV30/40), LFS1500 (AFV10), LFS1300 (AFS30/40), LFS1330 (AFG30/40/8), and LFS1350 (AFF50) control functions.
  • Engineering Environment – Configured using Yokogawa's Standard Builder Function (LHS5100/LHMS5100); no separate module-specific firmware tool is required.
Description
The YOKOGAWA AAI143-S53 S1 delivers 16 isolated input channels for standard 4-20mA signals from field transmitters, such as pressure, flow, and temperature devices. Its full channel isolation eliminates ground loops and cross-channel interference, significantly improving system stability and measurement accuracy. With a fast 10ms data update period and ±16μA accuracy, this module is engineered for real-time control applications that demand precision and speed.

Built to support both 2-wire and 4-wire transmitters, the YOKOGAWA AAI143-S53 S1 provides a built-in transmitter power supply (19.0V at 20mA) with a current limit of 25mA. This feature simplifies field wiring and reduces the need for external power supplies, lowering overall system costs. The module also supports dual-redundant configurations, ensuring continuous operation in critical control loops.

Designed for harsh industrial conditions, the YOKOGAWA AAI143-S53 S1 operates reliably from -20°C to +60°C and includes ISA Standard G3 option for corrosion resistance. Its flexible external connections—pressure clamp terminal, MIL connector cable, or KS dedicated cable—allow seamless integration into existing Yokogawa DCS architectures, making it a trusted choice for greenfield projects and retrofits alike.
Alternative Names
AAII43-S53 S1 AAI143-S53 SI AAII43-S53 SI AA1143-S53 S1 AAII43S53S1 AAI143S53S1 AAI143S53SI AAII43S53SI
Technical notes
When deploying the YOKOGAWA AAI143-S53 S1, note that a Zener barrier is not permitted; use an isolation barrier for intrinsically safe applications. Additionally, HART communication is available when the module is installed on an ER bus node unit with EB401 firmware rev. 2 or later.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Which control systems are compatible with the YOKOGAWA AAI143-S53 S1?
The YOKOGAWA AAI143-S53 S1 is designed for Yokogawa CENTUM VP and CS 3000 distributed control systems (DCS) utilizing FIO (Field Input/Output) architecture. It is compatible with FCS models including AFV30, AFV40, AFV10, AFS30, AFS40, AFG30, AFG40, AFG8, and AFF50 series.
Does the YOKOGAWA AAI143-S53 S1 support HART communication?
Yes, HART communication is available on the YOKOGAWA AAI143-S53 S1, but with specific requirements. The module must be installed in an ER bus node unit that has HART communication function, and the EB401 firmware must be revision 2 or later. Under these conditions, the module can read HART variables (via HART Command #3) from connected field devices.
What happens if a field transmitter draws more than 20mA from the YOKOGAWA AAI143-S53 S1?
The YOKOGAWA AAI143-S53 S1 is designed to handle over-range conditions. It allows input current up to 24mA, and its built-in transmitter power supply limits output current to 25mA. This protects the module and the system while still allowing diagnostic visibility into over-range conditions.
What is the input resistance of the YOKOGAWA AAI143-S53 S1 when the module is powered off?
When power is OFF, the YOKOGAWA AAI143-S53 S1 maintains an input resistance of 500 kΩ or higher. This prevents unintended current paths from external loops during maintenance or system shutdowns, protecting both the module and connected field devices.