{"product_id":"ai825-abb-s800-i-o-isolated-analog-input-module-buy","title":"AI825 ABB S800 I\/O Isolated Analog Input Module Buy","description":"\u003ch3\u003e\u003cstrong\u003eABB \u003cspan style=\"color: #0056b3;\"\u003eAI825\u003c\/span\u003e S800 Distributed I\/O Module Architecture\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eABB \u003cspan style=\"color: #0056b3;\"\u003eAI825\u003c\/span\u003e\u003c\/strong\u003e (Article Number: 3BSE036456R1) is a high-precision, 4-channel analog input module designed for the S800 I\/O distributed system architecture. Engineered with individual channel-to-channel galvanic isolation, this module processes bipolar voltage and current field signals across noisy industrial processing environments. Automation engineers utilize this unit to digitize high-accuracy process variables while eliminating ground loops between field sensors and the central control system backplane.\u003c\/p\u003e\n\u003cp\u003eEach input channel accommodates configurable signal ranges, including ±20 mA, 0–20 mA, 4–20 mA, ±10 V, 0–10 V, and 2–10 V, with 14-bit plus sign conversion resolution. Power to the internal analog stages is converted directly from the 24 V DC ModuleBus rail, providing stable field excitation. Current inputs feature dual protective stages: a direct input rating up to 6.3 V DC and a secondary over-voltage protected shunt input rated up to +30 V DC, limited via internal Positive Temperature Coefficient (PTC) thermistors.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eAI825\u003c\/span\u003e Technical Parameters \u0026amp; Performance Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand Manufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eABB Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCatalog Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eAI825\u003c\/span\u003e\u003c\/strong\u003e (3BSE036456R1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Family\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/s800-i-o\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003eS800 I\/O System\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChannel Count \u0026amp; Isolation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 Channels, Individually Galvanic Isolated Channel-to-Channel \u0026amp; System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConfigurable Signal Types\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±20 mA, 0(4)..20 mA, ±10 V, 0(2)..10 V Bipolar\/Unipolar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAnalog Resolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e14 Bit Plus Sign Bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 MΩ (Voltage Mode) | 50 Ω (Current Mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOver\/Under Range Capability\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±15% Full Scale Margin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement Error Limit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMaximum 0.1% Full Scale Accuracy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Coefficient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e34 ppm\/°C (±10V) | 47 ppm\/°C (0..10V) | 57 ppm\/°C (±20mA) | 78 ppm\/°C (0..20mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHardware Step Response Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e115 ms (Voltage Mode) | 130 ms (Current Mode) (0–90% Rise Time)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eScan Update Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLess than 10 ms Total Module Cycle Time\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNoise Rejection (CMRR \/ NMRR)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCMRR: 120 dB | NMRR: \u0026gt;40 dB at 50 Hz, \u0026gt;55 dB at 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIsolation Test Voltages\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1900 V DC (Channel-to-Channel) | 3250 V DC (Channel-to-Ground\/System)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModuleBus Power Draw\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e+5V DC: 70 mA (Typ.) \/ 100 mA (Max.) | +24V DC: 90 mA (Typ.) \/ 110 mA (Max.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThermal Dissipation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.5 Watts (Typical) | 3.2 Watts (Maximum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMatching Module Termination Units\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTU811, TU811V1, TU813, TU831 (Mechanical Keying Code: DA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnclosure Protection \u0026amp; Coating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP20 (IEC 60529) | ISA-S71.04 Class G3 Harsh Environment Protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePhysical Footprint \u0026amp; Mass\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e45 mm (W) x 102 mm (D) x 119 mm (H) | Net Weight: 0.22 kg (0.49 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eSystem Diagnostics \u0026amp; Operational Supervisory Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eABB \u003cspan style=\"color: #0056b3;\"\u003eAI825\u003c\/span\u003e\u003c\/strong\u003e incorporates hardware and firmware monitoring routines that continuously validate module health and signal integrity. Front panel LED indicators give field technicians visual status during commissioning and maintenance activities:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront LED Diagnostics:\u003c\/strong\u003e Features dedicated tri-color status LEDs on the front fascia: \u003cstrong\u003eF (Fault)\u003c\/strong\u003e, \u003cstrong\u003eR (Run)\u003c\/strong\u003e, and \u003cstrong\u003eW (Warning)\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Power Supervision:\u003c\/strong\u003e Onboard supervisory circuits track internal conversion rail voltages derived from the 24 V ModuleBus, flagging system alarms if operating thresholds drop.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStructured Error Flagging:\u003c\/strong\u003e Software status flags differentiate between Module Error, Module Warning, and individual Channel Error states inside System 800xA or Control Builder environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHART Protocol Compatibility:\u003c\/strong\u003e While the hardware does not pass digital HART data frames to the controller, the analog input stages withstand overlaid HART frequency communication without signal distortion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTarget Systems \u0026amp; Application Environments\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Plant Turbine Instrumentation:\u003c\/strong\u003e Converting bipolar ±10V valve positioning feedback signals in noisy electrical generator halls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetals \u0026amp; Heavy Rolling Mills:\u003c\/strong\u003e Digitizing dynamic tension transducer inputs where heavy motor drives generate large ground potential differences.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical Process Isolation Skids:\u003c\/strong\u003e Reading 4–20 mA transmitters across sub-systems requiring 250V rated insulation between field channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Treatment Distribution Nodes:\u003c\/strong\u003e Long-distance instrument drops up to 600 meters (656 yards) using standard field cabling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eLogistics, Packaging \u0026amp; Guarantee Terms\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Condition:\u003c\/strong\u003e Factory-packaged \u003cstrong\u003eABB \u003cspan style=\"color: #0056b3;\"\u003eAI825\u003c\/span\u003e\u003c\/strong\u003e (3BSE036456R1) unit in original antistatic industrial packaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpress Logistics:\u003c\/strong\u003e Dispatch occurs within 24 to 48 hours via fast express carriers (FedEx, UPS, DHL).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12-Month Guarantee:\u003c\/strong\u003e Includes a full 12-month operational replacement warranty starting from the date of dispatch.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eGlobal PLC Spare HUB Field Engineering Insight\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIn field applications involving the \u003cstrong\u003eABB \u003cspan style=\"color: #0056b3;\"\u003eAI825\u003c\/span\u003e\u003c\/strong\u003e, paying close attention to thermal layout and terminal unit selection is critical for continuous operation. During a recent maintenance audit at a paper mill, commissioning teams reported over-temperature warnings on an S800 I\/O rack. Inspection revealed that several high-density modules were mounted vertically inside a compact MTU enclosure operating at ambient temperatures above 40°C without adequate clearance.\u003c\/p\u003e\n\u003cp\u003eOur engineering team recommends observing ambient thermal limits: while standard horizontal DIN-rail mounting permits operation up to 55°C (131°F), vertical mounting inside compact MTU configurations reduces the maximum ambient limit to 40°C (104°F) due to thermal convection airflow paths. Furthermore, when wiring current loops, ensure the field cabling is connected to the PTC-protected terminals to safeguard the internal 50 Ω shunt resistors against accidental +30 V DC field shorts.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions \u0026amp; Practical Field Advice\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the main operational difference between the AI825 and standard S800 analog input modules like the AI810?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The key distinction is channel isolation and signal polarity. The AI825 provides individual channel-to-channel galvanic isolation (1900 V DC rating) and supports true bipolar ranges (±10V, ±20mA), whereas standard modules like the AI810 share a common return ground across channels and handle unipolar signals only.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I choose the correct Module Termination Unit (MTU) when ordering this input module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The AI825 uses mechanical keying code \u003cstrong\u003eDA\u003c\/strong\u003e and is compatible with MTU models TU811, TU811V1, TU813, and TU831. Select the TU811\/TU811V1 for standard compact wiring setups or the TU831 when extended field ground terminals are required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What happens if an over-voltage surge hits a 4–20 mA current channel on the module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Current inputs feature internal PTC thermistor protection rated to withstand sustained over-voltages up to +30 V DC. When a fault occurs, the PTC resistance increases rapidly to limit fault current, protecting the internal 50 Ω precision shunt resistor from burning out.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why does the module specification state HART \"No\" under General Info if the input withstands HART communications?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: \"HART No\" means the module cannot pass or process digital HART protocol variables into the control system software. However, the analog input filter circuit is designed so that the overlaid 1.2\/2.2 kHz HART FSK signal does not cause ripple or measurement errors in the analog 4–20 mA reading.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum field wiring distance supported by the AI825 analog input channels?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The module supports field cable runs up to 600 meters (656 yards). For long runs approaching this limit, use twisted-pair shielded cable to maintain high Common Mode Rejection Ratio (CMRR \u0026gt;120 dB) and shield against electromagnetic interference.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":45013889908918,"sku":"AI825","price":268.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/AI825.jpg?v=1787823240","url":"https:\/\/www.plcsparehub.com\/products\/ai825-abb-s800-i-o-isolated-analog-input-module-buy","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}