{"product_id":"allen-bradley-1756-irt8i-controllogix-input-module","title":"Allen-Bradley 1756-IRT8I ControlLogix 8-Point Isolated RTD\/Thermocouple Input Module","description":"\u003cp\u003eThe Allen-Bradley 1756-IRT8I is a high-precision analog input module designed for the ControlLogix platform. It provides eight isolated channels capable of interfacing with various temperature sensors, including multiple thermocouple types and resistance temperature detectors (RTDs), as well as millivolt signals. This module is engineered for industrial environments requiring reliable, high-resolution data acquisition and channel-to-channel isolation.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEight isolated input channels for enhanced noise immunity and signal integrity.\u003c\/li\u003e\n\u003cli\u003eSupports a wide range of thermocouple types including B, C, D, E, J, K, N, R, S, T, and TXK\/XK (L).\u003c\/li\u003e\n\u003cli\u003eConfigurable for RTD and millivolt input signals.\u003c\/li\u003e\n\u003cli\u003eIEEE 32-bit floating point data format for high-precision processing.\u003c\/li\u003e\n\u003cli\u003eFast module scan time of 1 ms to support dynamic process control.\u003c\/li\u003e\n\u003cli\u003eIntegrated diagnostic features to monitor for open circuits and out-of-range inputs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eIsolated RTD\/Thermocouple Input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e8 Isolated Channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e250V Continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5V)\u003c\/td\u003e\n\u003ctd\u003e250 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (24V)\u003c\/td\u003e\n\u003ctd\u003e150 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e4.6 W (Max)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Format\u003c\/td\u003e\n\u003ctd\u003eIEEE 32-bit floating point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScan Time\u003c\/td\u003e\n\u003ctd\u003e1 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the ControlLogix chassis is powered down before inserting or removing the 1756-IRT8I module to prevent electrical damage.\u003c\/li\u003e\n\u003cli\u003eUse appropriate shielded cabling for all thermocouple and RTD inputs to minimize electromagnetic interference (EMI).\u003c\/li\u003e\n\u003cli\u003eMaintain proper grounding practices for the chassis and field wiring to ensure signal accuracy and safety.\u003c\/li\u003e\n\u003cli\u003eVerify that the module is fully seated in the chassis slot and that the locking tab is engaged before securing the wiring arm.\u003c\/li\u003e\n\u003cli\u003eAvoid routing signal cables in close proximity to high-voltage power lines or high-frequency switching equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis module is frequently utilized in process control applications such as temperature monitoring in furnaces, chemical reactors, and boiler systems, as well as general-purpose industrial instrumentation where channel isolation is required to prevent ground loops.\u003c\/p\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs the 1756-IRT8I compatible with all ControlLogix chassis?\u003c\/strong\u003e\u003cbr\u003eYes, this module is designed to fit into any standard ControlLogix I\/O chassis.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this module require external power for the sensors?\u003c\/strong\u003e\u003cbr\u003eThe module draws power from the backplane; however, field-side wiring must be correctly terminated according to the specific sensor type (RTD or Thermocouple) being used.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the primary benefit of the isolated channels?\u003c\/strong\u003e\u003cbr\u003eThe 250V isolation between channels protects the module and the controller from potential differences between sensors, significantly reducing the risk of common-mode noise and measurement errors.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":51217535041788,"sku":"1756-IRT8I","price":86.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_7d821e4b-1fca-4ac0-a84b-1617ad883b56.jpg?v=1788373206","url":"https:\/\/www.electronicplc.com\/products\/allen-bradley-1756-irt8i-controllogix-input-module","provider":"Electronic PLC","version":"1.0","type":"link"}