{"product_id":"1756-ir6i-allen-bradley-controllogix-isolated-rtd-input-module","title":"1756-IR6I Allen-Bradley ControlLogix Isolated RTD Input Module","description":"\u003ch3\u003e\u003cb\u003eProduct Overview\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0056b3;\"\u003e1756-IR6I\u003c\/strong\u003e is a high-precision analog input module designed by \u003cstrong style=\"color: #0056b3;\"\u003eAllen-Bradley\u003c\/strong\u003e for the \u003cstrong style=\"color: #0056b3;\"\u003eControlLogix\u003c\/strong\u003e system. Featuring 6 individually isolated channels, this module provides accurate temperature measurement and resistance monitoring in demanding industrial environments.\u003c\/p\u003e\n\u003cp\u003eEngineered with a 16-bit Sigma-Delta analog-to-digital converter, the \u003cstrong style=\"color: #0056b3;\"\u003e1756-IR6I\u003c\/strong\u003e supports 100, 200, 500, and 1000 Ohm Platinum RTD sensors as well as direct ohm resistance ranges up to 4,000 Ohms. Individual channel-to-channel isolation eliminates ground loop interference, ensuring reliable data acquisition across complex process networks.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eModel Number\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong style=\"color: #0056b3;\"\u003e1756-IR6I\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eBrand \u0026amp; Manufacturer\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong style=\"color: #0056b3;\"\u003eAllen-Bradley\u003c\/strong\u003e \/ Rockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eProduct Series\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-1756-controllogix\"\u003e\u003cstrong style=\"color: #0056b3;\"\u003eControlLogix\u003c\/strong\u003e\u003c\/a\u003e Industrial Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eModule Function\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e6-Channel Individually Isolated RTD Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eSupported Sensors\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e100, 200, 500, 1000 Ohm Platinum RTD \/ Resistance Transducers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eInput Resistance Ranges\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e1–87 Ω, 2–1000 Ω, 4–2000 Ω, 8–4000 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eA\/D Resolution\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e16 Bits (7.7 mΩ\/bit to 60 mΩ\/bit depending on range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eConversion Method\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eSigma-Delta Conversion Architecture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eBackplane Current Draw\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e250 mA @ 5.1 VDC | 125 mA @ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eTotal Power \u0026amp; Thermal Dissipation\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e4.3 W Max Power Dissipation | 14.66 BTU\/hr Thermal Output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eGalvanic Isolation Rating\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e50V Continuous (Channel-to-Channel \u0026amp; Channel-to-Backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eModule Scan Time\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e10 ms (Integer Ohms) | 25 ms (Floating Point Ohms) | 50 ms (Floating Point Temperature)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eCalibrated Accuracy\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eBetter than 0.1% of range @ 25°C (6-month calibration interval)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eCompatible Removable Terminal Blocks\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e1756-TBNH (20-pin NEMA) or 1756-TBSH (20-pin Spring Clamp)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eEnvironmental HazLoc Codes\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eNorth American T4A | IEC T4 Temperature Code\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cb\u003eDiagnostic \u0026amp; Filtering Capabilities\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eOpen-Circuit Detection:\u003c\/b\u003e Automatically senses broken RTD lead wires or sensor element failure and sets diagnostic status flags in controller tags.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eChannel-to-Channel Isolation:\u003c\/b\u003e 50V continuous basic insulation prevents common-mode noise propagation between field sensors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDigital Filtering:\u003c\/b\u003e Onboard Sigma-Delta filtering reduces 50\/60 Hz line noise, achieving sub-0.1% calibrated measurement accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUnder\/Over-Range Alarming:\u003c\/b\u003e Dynamic software alarms trigger immediate notification during out-of-spec process temperature spikes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eApplication Scenarios \u0026amp; System Compatibility\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eTurbine Bearing Temperature Monitoring:\u003c\/b\u003e Connects directly to multi-point platinum RTD elements in power generation plants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePetrochemical Reactor Skid Control:\u003c\/b\u003e Measures high-precision thermal profiles across hazardous processing zones without interposing transmitters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePharmaceutical Batch Sterilization:\u003c\/b\u003e Delivers high-resolution 16-bit temperature data for critical FDA compliance logging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eInstallation \u0026amp; Wiring Best Practices\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eTerminal Block Keying:\u003c\/b\u003e Configure mechanical RTB keying stops on the 1756-TBNH or 1756-TBSH block to prevent miswiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eShielded Cabling:\u003c\/b\u003e Use Category 2 individual shielded twisted-pair lead wires grounded at one end to minimize high-frequency noise EMI.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHot-Swappable RIUP:\u003c\/b\u003e Supports Removal and Insertion Under Power (RIUP) for rapid maintenance without stopping the backplane.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003ePackaging, Logistics \u0026amp; Warranty\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePackage Contents:\u003c\/b\u003e 1x \u003cstrong style=\"color: #0056b3;\"\u003eAllen-Bradley\u003c\/strong\u003e \u003cstrong style=\"color: #0056b3;\"\u003e1756-IR6I\u003c\/strong\u003e module sealed in anti-static protective packaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGlobal Express Delivery:\u003c\/b\u003e Ships via DHL, FedEx, or UPS within 24 to 48 hours of order confirmation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFactory Warranty:\u003c\/b\u003e Fully covered by a 12-month quality assurance replacement warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eEngineering Procurement \u0026amp; Selection Guide\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eConfirm Sensor Resistance:\u003c\/b\u003e Ensure your field RTD element type matches supported 100\/200\/500\/1000 Ohm Platinum specs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAssess Lead Wire Resistance:\u003c\/b\u003e Choose 3-wire or 4-wire RTD configurations to compensate for long field cable runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOrder Terminal Block Separately:\u003c\/b\u003e Remember that removable terminal blocks (1756-TBNH \/ 1756-TBSH) are sold separately from the card.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions (FAQ)\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: What is the main advantage of choosing the \u003cstrong style=\"color: #0056b3;\"\u003e1756-IR6I\u003c\/strong\u003e over the standard non-isolated 1756-IR6T module?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: The isolated card features full point-to-point galvanic isolation, which prevents ground loops and electrical interference when sensors share different ground references.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: How do I configure floating-point versus integer data formats for temperature reads?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: Configuration is handled via Studio 5000 \/ Logix Designer module properties, where you select IEEE 32-bit floating-point or 16-bit left-justified integer modes.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: What causes an open-wire fault flag on a specific channel?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: This occurs when field wire resistance exceeds upper limits, a conductor snaps, or the connected RTD element burns out.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Can this unit measure pure resistance transducers without converting to temperature units?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes, you can set the channel configuration directly to resistance mode (1–87 Ω, 2000 Ω, or 4000 Ω ranges).\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: What is the recommended calibration interval for high-precision thermal applications?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: Factory specifications recommend a 6-month calibration interval to maintain accuracy better than 0.1% of span.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eGlobal PLC Spare HUB's Insight\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eDuring a field overhaul at a chemical processing plant, a customer reported fluctuating, erratic readings on two channels of a \u003cstrong style=\"color: #0056b3;\"\u003e1756-IR6I\u003c\/strong\u003e card installed on a long-distance reactor bed monitoring line.\u003c\/p\u003e\n\u003cp\u003eOur technical specialists audited the installation and discovered that the technician had tied the sensor shields at both the field junction box and the PLC rack, creating a subtle ground loop. Additionally, the lead wire compensation in Studio 5000 had not been performed following a wire extension. Once we removed the extra shield ground, re-calibrated the channel offsets, and verified the 16-bit Sigma-Delta filtering parameters, the temperature signals stabilized immediately with zero drift. Proper grounding and lead-wire calibration are essential for achieving sub-degree precision!\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013898494134,"sku":"1756-IR6I","price":133.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1756-IR6I-3.jpg?v=1788938876","url":"https:\/\/www.plcsparehub.com\/products\/1756-ir6i-allen-bradley-controllogix-isolated-rtd-input-module","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}