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        Yokogawa AAI841-H00 S2
        Yokogawa AAI841-H00 S2
        Yokogawa AAI841-H00 S2
        Yokogawa AAI841-H00 S2
        Yokogawa AAI841-H00 S2
        Yokogawa AAI841-H00 S2
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        • Lifecycle status

          Discontinued / Obsolete by OEM
          Apter Power delivers completely calibration-verified, out-of-production loop hardware to stabilize your critical valve-positioner grids and insulate your chemical process lines from catastrophic signal drifts and control-loop loop deadlocks.

        AAI841-H00 S2

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        1001 reviews ｜ Need a Specific Revision?
        The Yokogawa AAI841-H00 S2 is a Analog Input/Output Module engineered seamlessly for CENTUM VP/CS 3000 distributed control systems (DCS).
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        Ships by Thursday, October 29
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
        Parts Availability
        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for AAI841-H00 S2

        • Manufacturer:
          Yokogawa
        • Part Number:
          AAI841-H00 S2
        • Product Family:
          Centum CS-Centum VP
        • Product Type:
          Analog I/O Module
        • Stock:
          1
        • Number of Channels:
          8-Channel Input / 8-Channel Output
        • Signal Ranges:
          4 to 20 mA DC (Both Input and Output)
        • Data Update Cycle:
          10 ms
        • Step Response Time:
          Input: 100 ms / Output: 40 ms
        • Input Allowable Current:
          Max. 25 mA
        • Transmitter Power Supply:
          ≥14.8 V (at 20 mA), ≤ 26.4 V (at 0 mA)
        • Output Allowable Load Resistance:
          0 to 750 Ω
        • Accuracy:
          Input: ±16 μA / Output:48 μA
        • Current Consumption:
          Max. 310 mA (5 V DC), Max. 250 mA (24 V DC)
        • Weight:
          0.3 kg
        • Estimated shipping dimensions:
          3.2x10.6x13cm
        • 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 Operating Environment Monitoring & Control

        Features:

        • Consolidated Bi-Directional 16-Channel Density
        • Native HART Protocol Integration
        • High-Availability Dual-Redundancy Architecture
        The Yokogawa AAI841-H00 S2 integrates 8 analog inputs and 8 analog outputs into one non-isolated form-factor, drastically reducing I/O footprint and maximizing slot utilization in FIO nodes.

        By superimposing digital HART data onto standard 4-20 mA current loops, the Yokogawa AAI841-H00 S2 delivers seamless device parameter tuning, device status diagnostics, and variable tracking without standalone modems.

        The Yokogawa AAI841-H00 S2 fully supports dual-redundant pairings, executing rapid, bumpless control transfer if a fault occurs, making it ideal for high-risk, zero-downtime applications.

        The AAI841-H00 S2 Yokogawa Analog I/O Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Yokogawa AAI841-H00 S2 Analog I/O 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 AAI841-H00 S2 Analog I/O Module

        General

        • Manufacturer Yokogawa
        • Model AAI841-H00 S2
        • Condition New Original ready stock
        • Product Family AAI835-H03 S1,AAI841-H00 S1,AAI841-H03 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.
        • Oil & Gas Refining and Petrochemicals: The module is widely used to regulate heavy distillation columns, monitor line pressures, and actuate control valves in volatile hydrocarbon refinery sectors.
        • Power Generation Facilities: It acts as a reliable loop controller managing water feed-pumps, steam flow metrics, and thermal generation processes that demand non-stop availability.
        • Chemical Processing Plants: It provides safe, precise dosing and batch mixing management by continuously reading field flowmeters and adjusting proportional dosing pumps.
        • Water & Wastewater Infrastructure: It coordinates continuous processing metrics, managing chemical treatment basins and municipal distribution networks over large geographic areas.
        • Non-Isolated Line Integrity: Operating as a non-isolated module, it is optimized for systems sharing a common, high-integrity system ground to block common-mode voltage disruptions.
        • Strict Thermal Limits: Engineered to maintain maximum precision across standard FIO environmental classifications, requiring proper cabinet ventilation to prevent heat build-up.
        • Low Power Footprint: The module draws a lean 310 mA at 5 V DC and 250 mA at 24 V DC, minimizing internal heat dissipation within densely packed control cabinets.
        • Robust Mechanical Form Factor: Weighing just 0.3 kg, its compact design clips securely onto specialized FIO base plates, offering superior resistance to ambient vibrations and shocks.
        • Bidirectional Signal Consolidation: Seamlessly handles 8 independent 4-20 mA current inputs and 8 current outputs simultaneously, delivering compact, full-loop monitoring capabilities.
        • Advanced HART Diagnostic Transparency: Passes high-level digital field variables, asset health codes, and device warnings directly back to the asset management software for faster troubleshooting.
        • Ultra-Fast Signal Processing: Boasts a 10 ms data refresh cycle that enables the CENTUM system to run high-precision, real-time PID controls on fast-acting processes.
        • Redundant Loop Stability: Supports pairing configurations to manage bumpless failovers, ensuring that output channels do not freeze or drop during unexpected module transitions.
        Description
        The Yokogawa AAI841-H00 S2 stands as a cornerstone of modern industrial automation, purposefully built to bridge the gap between field instrumentation and the CENTUM VP control architecture. By consolidating eight 4-to-20 mA inputs and eight 4-to-20 mA outputs onto a single high-efficiency module, it slashes cabinet space requirements and streamlines cross-wiring complexities. This dual-function layout provides operators with full-spectrum, bidirectional control, making it a cost-effective, premium-tier choice for dense I/O loops.

        Equipped with advanced onboard digital processing, the Yokogawa AAI841-H00 S2 natively supports HART communication protocols, unlocking deep-level field device diagnostic data without the need for auxiliary hardware. This allows the DCS to extract real-time variable reporting, device configuration statistics, and predictive maintenance indicators directly from intelligent transmitters and valve positioners. Consequently, the Yokogawa AAI841-H00 S2 empowers plants to transition from reactive troubleshooting to structured predictive asset management, significantly driving down unscheduled downtime.

        Engineered with mission-critical systems in mind, the Yokogawa AAI841-H00 S2 fully supports dual-redundant configurations to eliminate single points of failure in hazardous processing plants. When installed in a redundant paired setup, the module ensures hot-swappable, bumpless transition logic, guaranteeing that active signal paths remain uninterrupted during module servicing or sudden hardware line breaks. This industrial-grade resilience ensures that the Yokogawa AAI841-H00 S2 satisfies the strict runtime availability standards demanded by global petrochemical, refining, and energy generation infrastructures.
        Alternative Names
        AAI841 H00 S2 AAI84I-H00 S2 AA1841-H00 S2 AAI841-HOO S2 AAI841-H00 AAI841-H00 S1 AAI841-H03 S1 AAI835-H00 S1
        Technical notes
        The Yokogawa AAI841-H00 S2 module is designed with independent, per-channel hardware setting pins that permit field engineers to manually configure each input loop for either 2-wire transmitter power distribution or 4-wire external current sources. When integrating the Yokogawa AAI841-H00 S2 into high-density marshalling cabinets, it is essential to utilize compatible pressure-clamp terminal blocks (such as ATA4S or ATA4D) or specialized MIL-connector cable assemblies to preserve its fast 10 ms data refresh cycle and ensure accurate loop impedance matching.
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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.
        VIEW ALL FAQS
        How does the Yokogawa AAI841-H00 S2 handle switching between 2-wire and 4-wire transmitter connections?
        The Yokogawa AAI841-H00 S2 utilizes physical setting pins located directly on the module body for each individual input channel. By shifting these hardware jumpers, engineers can toggle between a 2-wire configuration (where the module feeds loop power to the transmitter) and a 4-wire configuration (where the field device supplies its own current loop power), allowing tailored channel setups within the same unit.
        What happens to the current input loops if the Yokogawa AAI841-H00 S2 loses system power entirely?
        In the event of a total system power failure, the current input loops of the Yokogawa AAI841-H00 S2 transition into a safe open-circuit state, exhibiting an input resistance of ≥500kΩ. This behavior ensures that unpowered modules do not load down external current loops or cause signal disruptions to upstream parallel monitoring devices.
        Which marshalling options and terminal blocks are officially compatible with the Yokogawa AAI841-H00 S2?
        The Yokogawa AAI841-H00 S2 is highly versatile and supports multiple connection interfaces. It can be paired directly with the ATA4S single terminal block or the ATA4D dual-redundant terminal block for pressure-clamp wiring; alternatively, it can interface with the AEA4D terminal board via a dedicated ATK4A adapter and standard KS1 cable assemblies.
        Can the Yokogawa AAI841-H00 S2 be hot-swapped in a running CENTUM VP node without shutting down the process?
        Yes, when the Yokogawa AAI841-H00 S2 is implemented in an authorized dual-redundant configuration, the standby unit continuously tracks the control state. If a hardware failure occurs, or if a technician pulls the module out for maintenance, a bumpless failover executes, keeping field signals completely stable.
        What environmental operating restrictions should be observed when mounting the Yokogawa AAI841-H00 S2 in outdoor field enclosures?
        The Yokogawa AAI841-H00 S2 must be deployed in environments adhering to standard FIO specifications, typically requiring a temperature-controlled cabinet to mitigate extreme thermal drift. Because it is a non-isolated module, it is critical to ensure proper grounding protocols across all current loops to prevent ground differentials from degrading accuracy or stressing electronics.

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