{"product_id":"ai845-3bse023675r1-abb-s800-i-o-redundant-analog-input-module-in-stock","title":"AI845 3BSE023675R1 ABB S800 I\/O Redundant Analog Input Module In Stock","description":"\u003ch3\u003eAI845 3BSE023675R1 ABB S800 I\/O Analog Input Module Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eABB AI845\u003c\/span\u003e\u003c\/strong\u003e is a high-availability 8-channel analog input module engineered for the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eS800 I\/O\u003c\/span\u003e\u003c\/strong\u003e system family. Designed for high-reliability process control, the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eAI845\u003c\/span\u003e\u003c\/strong\u003e supports both single and dual-redundant configurations with full HART pass-through communication capability. Each unipolar input channel acquires standard field signals including 0...20 mA, 4...20 mA, 0...5 V, and 1...5 V d.c. Integrated transmitter power supply control simplifies cabling by feeding 2-wire or 3-wire field transmitters directly from the termination unit.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \u0026amp; Series:\u003c\/strong\u003e ABB \u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/s800-i-o\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eS800 I\/O\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel \u0026amp; Part Number:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eAI845\u003c\/span\u003e\u003c\/strong\u003e \/ \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e3BSE023675R1\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel Architecture:\u003c\/strong\u003e 8 single-ended unipolar channels, groupwise isolated from system earth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Measurement Ranges:\u003c\/strong\u003e 0...20 mA, 4...20 mA, 0...5 V, 1...5 V d.c.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Resolution \u0026amp; Accuracy:\u003c\/strong\u003e 12 Bit resolution with max total error of 0.1%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e Greater than 10 MΩ (Voltage mode); 250 Ω nominal (Current mode)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Conversion Dynamics:\u003c\/strong\u003e 10 ms update cycle time with 290 ms filter rise time (0-90%)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Coefficient:\u003c\/strong\u003e Maximum temperature drift of 50 ppm\/°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterference Rejection:\u003c\/strong\u003e Normal Mode Rejection Ratio (NMRR) greater than 40 dB at 50\/60 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOvervoltage \u0026amp; Insulation:\u003c\/strong\u003e 11 V d.c. non-destructive overvoltage withstand; 50 V rated insulation with 500 V a.c. dielectric test level\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Backplane Power Demand:\u003c\/strong\u003e 100 mA at +5 V d.c. Modulebus; 50 mA at +24 V d.c. Modulebus\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Supply Demand:\u003c\/strong\u003e Max 265 mA at +24 V d.c. (22 mA base + transmitter current load x 1.32)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSuitable Equipment and Application Scenarios\u003c\/h3\u003e\n\u003cp\u003eEngineers specify the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eABB AI845\u003c\/span\u003e\u003c\/strong\u003e module for continuous process plants where unexpected I\/O channel loss results in costly downtime. Typical equipment integrations include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFault-Tolerant DCS Loops:\u003c\/strong\u003e Paired with redundant controller bases in oil refineries, chemical reactors, and gas compression stations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHART Field Device Networks:\u003c\/strong\u003e Interfacing smart pressure, flow, and temperature transmitters requiring bi-directional digital parameter passing to central asset management software.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Generation Turbines:\u003c\/strong\u003e Monitoring critical 1...5 V and 4...20 mA feedback signals from hydraulic actuators and throttle valve positioners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote Pump Stations:\u003c\/strong\u003e Supplying dedicated current-limited loop power to 2-wire transmitters over long field cabling runs up to 600 meters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003cp\u003eMount the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eAI845\u003c\/span\u003e\u003c\/strong\u003e onto compatible Module Termination Units using keying code \u003cstrong\u003eCC\u003c\/strong\u003e to prevent cross-module insertion errors. Engage the dual retention clips to seat internal backplane pins into the Modulebus. For channel-by-channel mixed voltage and current operation, wire the module to a \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eTU844\u003c\/span\u003e\u003c\/strong\u003e or \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eTU845\u003c\/span\u003e\u003c\/strong\u003e MTU. Ensure field wiring shielding grounds tie back to designated busbars to maintain G3 ISA-S71.04 corrosion tolerance in harsh environments.\u003c\/p\u003e\n\u003ch3\u003eAdvanced Diagnostic Capabilities\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eAI845\u003c\/span\u003e\u003c\/strong\u003e contains real-time supervisory circuits covering internal, external, and channel-level operations. Front-facing LEDs display Fault (F), Run (R), and Warning (W) conditions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal System Checks:\u003c\/strong\u003e Real-time monitoring of analog read-back circuitry, reference voltages, internal power rails, memory checksums, and watchdog timers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiplexer \u0026amp; Filter Health:\u003c\/strong\u003e On-board diagnostics sweep internal low-pass filters, input multiplexers, and dedicated test channels continuously.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Field Fault Handling:\u003c\/strong\u003e Immediate detection of external power supply dropouts, transmitter power overcurrent conditions, and external shunt resistor errors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility Matrix\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eAI845\u003c\/span\u003e\u003c\/strong\u003e supports flexible integration across the standard S800 termination family:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRedundant Base Units:\u003c\/strong\u003e TU844, TU845, TU854\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimplex Base Units:\u003c\/strong\u003e TU810, TU810V1, TU812, TU814, TU818, TU830, TU833, TU835, TU838\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtocol Compatibility:\u003c\/strong\u003e Native HART pass-through across standard 4...20 mA loops\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCertifications and Industrial Standards\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eABB AI845\u003c\/span\u003e\u003c\/strong\u003e complies with severe industrial environmental specifications. Electrical safety ratings include EN 61010-1 and UL 61010-2-201. Hazardous location approvals cover Class 1 Division 2 cULus, Class 1 Zone 2 cULus, and ATEX Zone 2. Marine installation approval covers Bureau Veritas (BV), Det Norske Veritas (DNV), and Lloyd's Register (LR). Industrial EMC compliance covers EN 61000-6-2 immunity and EN 61000-6-4 emissions.\u003c\/p\u003e\n\u003ch3\u003ePackaging, Warranty, and Express Logistics\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Packaging:\u003c\/strong\u003e 1 x Factory-Sealed \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eABB AI845\u003c\/span\u003e\u003c\/strong\u003e Analog Input Module (Article \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e3BSE023675R1\u003c\/span\u003e\u003c\/strong\u003e)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Terms:\u003c\/strong\u003e Covered by a comprehensive 12-Month replacement warranty against hardware defects\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping Expediting:\u003c\/strong\u003e Dispatched within 24 to 48 hours via premium express couriers including FedEx, UPS, and DHL for global site delivery\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGlobal PLC Spare HUB's Insight\u003c\/h3\u003e\n\u003cp\u003eWhen upgrading standard S800 racks to redundant configurations, system integrators often miss the MTU dependency of the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eAI845\u003c\/span\u003e\u003c\/strong\u003e. While the module installs physically onto a basic TU810 MTU, achieving dual-module hardware redundancy requires pairing two \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eAI845\u003c\/span\u003e\u003c\/strong\u003e modules on a \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eTU844\u003c\/span\u003e\u003c\/strong\u003e or \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eTU845\u003c\/span\u003e\u003c\/strong\u003e base. Furthermore, using non-redundant MTUs forces all 8 channels to share the same input signal type (all current or all voltage), whereas the TU844\/TU845 termination units enable independent per-channel signal selection. Verifying your target MTU part number prior to commissioning prevents unexpected hardware re-wiring.\u003c\/p\u003e\n\u003ch3\u003eSelection Guide and Engineering FAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSelection Tip:\u003c\/strong\u003e Choose the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eAI845\u003c\/span\u003e\u003c\/strong\u003e when your control system demands process redundancy or direct HART transmitter power distribution without extra terminal blocks. For basic non-redundant installations without HART pass-through requirements, evaluate standard non-redundant S800 analog modules.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion: How does the AI845 handle transmitter short-circuit conditions in the field?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: Each channel features individual current-limiting circuitry on the external transmitter power output. If a field cable shorts, the module limits loop current, flags an external channel error, and prevents the fault from pulling down the main 24 V d.c. field supply rail.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion: Can I read 0...5 V pressure transducers and 4...20 mA flow meters on the same module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: Yes, provided the module is mounted on a TU844 or TU845 MTU. These specific termination units enable individual channel switching between voltage and current input modes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion: What is the primary operational difference between the AI845 and standard analog input units like the AI810?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: The \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eAI845\u003c\/span\u003e\u003c\/strong\u003e supports dual-module hardware redundancy, HART pass-through communications, higher power dissipation capability (3.5 W vs 1.5 W), and comprehensive channel-level test diagnostics missing in basic modules.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion: Does a HART hand-held communicator or asset management software require special modem taps on the module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: No, the module incorporates native HART pass-through circuitry. Superimposed FSK HART signals travel through the internal analog conversion paths to the controller Modulebus without interfering with the 4-20 mA primary process variable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion: How does temperature affect module installation inside compact control cabinets?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnswer: The module operates at ambient temperatures up to +55 °C under horizontal DIN-rail mounting. When mounted vertically inside compact MTUs, the maximum allowable ambient operating temperature scales down to +40 °C to maintain proper internal convection cooling.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":45382119489718,"sku":"AI845","price":185.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/AI845.jpg?v=1787642613","url":"https:\/\/www.plcsparehub.com\/products\/ai845-3bse023675r1-abb-s800-i-o-redundant-analog-input-module-in-stock","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}