{"product_id":"aai835-s00-yokogawa-centum-vp-isolated-analog-i-o-module","title":"AAI835-S00 Yokogawa CENTUM VP Isolated Analog I\/O Module","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #d9534f;\"\u003e\u003cstrong\u003eYokogawa AAI835-S00\u003c\/strong\u003e\u003c\/span\u003e provides simultaneous 4-channel input and 4-channel output signal processing within a compact form factor. Designed for CENTUM VP control systems, this current I\/O module manages four 4 to 20 mA analog input loops while driving four independent 4 to 20 mA control outputs. Every channel features individual galvanic isolation to eliminate ground loops between field instruments and the system logic.\u003c\/p\u003e\n\u003cp\u003eEngineers deploy the \u003cspan style=\"color: #d9534f;\"\u003e\u003cstrong\u003eAAI835-S00\u003c\/strong\u003e\u003c\/span\u003e in applications requiring closed-loop control on a single board. The unit supports dual-redundant pairing to guarantee uninterrupted process operation. Built-in transmitter power supplies supply up to 29.3 V DC directly to field instruments, reducing panel wiring complexity and external power hardware.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features and Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombined Signal Processing:\u003c\/strong\u003e Consolidates 4 inputs and 4 outputs into a single module slot to optimize panel density.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel-to-Channel Isolation:\u003c\/strong\u003e Prevents signal crosstalk and ground loop interference via 500 V AC isolation barriers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Redundancy:\u003c\/strong\u003e Enables hot-standby module pairs to ensure continuous control loop uptime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Loop Power:\u003c\/strong\u003e Supplies up to 29.3 V DC for loop-powered 2-wire field transmitters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid Loop Response:\u003c\/strong\u003e Updates input and output data every 10 milliseconds for tight loop control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen-Circuit Detection:\u003c\/strong\u003e Flags broken field wires instantly when signal currents drop below 0.65 mA.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eConfiguration Breakdown \u0026amp; Model Suffix Tree\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eUnderstanding the exact part structure for the \u003cspan style=\"color: #d9534f;\"\u003e\u003cstrong\u003eYokogawa AAI835-S00\u003c\/strong\u003e\u003c\/span\u003e ensures correct ordering specs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel: AAI835\u003c\/strong\u003e — Analog I\/O Module (4 to 20 mA, 4-Channel Input \/ 4-Channel Output, Channel-Isolated)\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuffix Code: -S\u003c\/strong\u003e — Standard Type Processing Execution\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuffix Code: 5\u003c\/strong\u003e — Non-Explosion Protection Specification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuffix Code: 0\u003c\/strong\u003e — Basic Operational Feature Set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eFunctional parameters for the \u003cspan style=\"color: #d9534f;\"\u003e\u003cstrong\u003eYokogawa AAI835-S00\u003c\/strong\u003e\u003c\/span\u003e appear below, organized by system operational categories.\u003c\/p\u003e\n\u003ctable style=\"border-collapse: collapse; width: 100%;\" cellspacing=\"0\" cellpadding=\"6\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"text-align: left;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003e\u003cstrong\u003eSpecification Details\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\"\u003e\u003cstrong\u003eCore Identity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBrand \u0026amp; Manufacturer\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYokogawa\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel \u0026amp; Suffix\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan style=\"color: #d9534f;\"\u003e\u003cstrong\u003eAAI835-S00\u003c\/strong\u003e\u003c\/span\u003e (CENTUM Series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"3\"\u003e\u003cstrong\u003eChannel Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e4 channels, 4 to 20 mA DC (Allowable maximum: 25 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e4 channels, 4 to 20 mA DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Isolation\u003c\/td\u003e\n\u003ctd\u003eIndividual channel-to-channel and channel-to-system isolation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\"\u003e\u003cstrong\u003eAccuracy \u0026amp; Speed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInput \/ Output Accuracy\u003c\/td\u003e\n\u003ctd\u003eInput: ±16 µA; Output: ±48 µA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Update Period\u003c\/td\u003e\n\u003ctd\u003e10 ms execution cycle for complete channel refresh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\"\u003e\u003cstrong\u003eOutput \u0026amp; Power Capabilities\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAllowable Load Resistance\u003c\/td\u003e\n\u003ctd\u003e0 to 750 Ω load driving range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmitter Power Output\u003c\/td\u003e\n\u003ctd\u003e15.0 V minimum (at 20 mA) to 29.3 V maximum (at 0 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"3\"\u003e\u003cstrong\u003eElectrical \u0026amp; Environmental\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWithstanding Voltage\u003c\/td\u003e\n\u003ctd\u003e500 V AC for 1 minute (Input\/Output to system \u0026amp; channel-to-channel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFault Detection Threshold\u003c\/td\u003e\n\u003ctd\u003eCircuit-open detection at currents less than 0.65 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Drift\u003c\/td\u003e\n\u003ctd\u003e±16 µA\/10 °C thermal coefficient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\"\u003e\u003cstrong\u003ePower \u0026amp; Mechanics\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMaximum Current Draw\u003c\/td\u003e\n\u003ctd\u003e360 mA at 5 V DC; 450 mA at 24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhysical Weight\u003c\/td\u003e\n\u003ctd\u003e0.3 kg net weight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eTarget Equipment and Application Scenarios\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eControl of variable speed drive speeds while simultaneously reading motor feedback tachometers.\u003c\/li\u003e\n\u003cli\u003eModulating control valve positioning coupled with analog valve position transmitter feedback loops.\u003c\/li\u003e\n\u003cli\u003ePID pressure control loops in boiler feed pumps and gas turbine fuel metering skids.\u003c\/li\u003e\n\u003cli\u003eDosing pump output regulation combined with inline flowmeter feedback in chemical injection systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eDiagnostic Capabilities and Fault Management\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #d9534f;\"\u003e\u003cstrong\u003eYokogawa AAI835-S00\u003c\/strong\u003e\u003c\/span\u003e monitors field loop continuous health in real time. Integrated circuit-open detection automatically detects broken wiring when signal current drops below 0.65 mA. The system controller flags out-of-range signal limits instantly, enabling quick maintenance response before process disruption occurs.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eGlobal PLC Spare HUB's Insight \u0026amp; Field Experience\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIn our experience on DCS retrofits, the \u003cspan style=\"color: #d9534f;\"\u003e\u003cstrong\u003eAAI835-S00\u003c\/strong\u003e\u003c\/span\u003e solves space constraints when adding isolated control loops to populated nodes. Instead of mounting separate input and output modules, this 4-in\/4-out design cuts backplane rack space requirements in half.\u003c\/p\u003e\n\u003cp\u003ePay close attention to total load loop resistance on the output side. Ensure combined field wiring and actuator impedance stays below 750 Ω. Exceeding 750 Ω causes current loop saturation, leading to inaccurate control valve positioning under full load conditions.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eCompliance, Shipping, and Warranty Terms\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Contents:\u003c\/strong\u003e 1 x New factory-sealed \u003cspan style=\"color: #d9534f;\"\u003e\u003cstrong\u003eYokogawa AAI835-S00\u003c\/strong\u003e\u003c\/span\u003e Analog I\/O Module with anti-static protection and factory documentation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Coverage:\u003c\/strong\u003e Includes a comprehensive 12-month replacement warranty effective from the purchase date.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpress Logistics:\u003c\/strong\u003e Dispatches within 24-48 hours with express global courier options via FedEx, UPS, or DHL.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion: How does an analog I\/O module differ from dedicated input modules?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: Analog I\/O modules combine signal acquisition and drive outputs on one board, handling 4 inputs and 4 outputs simultaneously.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion: What happens to the system output if a field wire cuts?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: The circuit-open diagnostic triggers when current falls under 0.65 mA, raising a hardware fault alert in the control software.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion: What is the maximum load resistance supported on the output loops?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: The module drives field devices with total loop load resistances ranging from 0 up to 750 Ω.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion: How should I determine if this basic type suffix fits my panel?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: Suffix 0 indicates a basic type module without specialized G3 coating options or extreme wide-temperature ratings, making it ideal for standard control cabinets.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion: Can I wire 2-wire transmitters directly without external power supplies?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: Yes, the module provides onboard transmitter power between 15.0 V and 29.3 V DC directly across the input terminals.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/For_AAI835.png?v=1785133879\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":45013886697654,"sku":"AAI835-S00","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/AAI835-S00_c41cfe7b-32cc-4b9c-87f3-6d56424af411.jpg?v=1785132468","url":"https:\/\/www.plcsparehub.com\/products\/aai835-s00-yokogawa-centum-vp-isolated-analog-i-o-module","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}