{"product_id":"1756-irt8i-allen-bradley-controllogix-8-point-input-module","title":"1756-IRT8I Allen-Bradley ControlLogix 8 Point Input Module","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1756-IRT8I\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1756-IRT8I\u003c\/strong\u003e RTD Thermocouple Input Module, operates as a dedicated hardware component for isolated temperature signal acquisition within ControlLogix automation platforms.\u003c\/p\u003e\n\u003ch3\u003eModel Reference\u003c\/h3\u003e\n\u003cp\u003eThe Allen-Bradley 1756-IRT8I is an 8-channel isolated analog input module designed for RTD, thermocouple, and millivolt signal measurement. It provides temperature data conversion and transfers processed values through the ControlLogix backplane communication system.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1756-IRT8I\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eRTD Thermocouple Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eControlLogix\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.35 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e23.3 x 18.2 x 5.3 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e4.6 W maximum\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\u003eInput Type\u003c\/td\u003e\n\u003ctd\u003eRTD \/ Thermocouple \/ Millivolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e250 V continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Scan Time\u003c\/td\u003e\n\u003ctd\u003e1 ms\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\u003eBackplane Current (5.1 VDC)\u003c\/td\u003e\n\u003ctd\u003e200 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (24 VDC)\u003c\/td\u003e\n\u003ctd\u003e150 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Thermocouple Types\u003c\/td\u003e\n\u003ctd\u003eB, C, D, E, J, K, N, R, S, T, TXK\/XK (L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eControlLogix Temperature Measurement Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe 1756-IRT8I integrates with ControlLogix chassis architecture to process temperature-related analog signals from industrial sensors. The isolated input design provides channel separation for RTD, thermocouple, and millivolt measurements.\u003c\/p\u003e\n\u003cp\u003eAllen-Bradley ControlLogix modules use deterministic backplane communication for data exchange between I\/O modules and Logix controllers. The 1756-IRT8I requires compatible firmware flash compatibility, module configuration, and controller recognition settings before operation.\u003c\/p\u003e\n\u003ch3\u003eSignal Processing and Isolation Capability\u003c\/h3\u003e\n\u003cp\u003eThe module provides eight isolated input channels with support for multiple thermocouple types and RTD measurement applications. The IEEE 32-bit floating point data format allows processed temperature values to be transferred directly to ControlLogix controller applications.\u003c\/p\u003e\n\u003cp\u003eThe 250 V continuous isolation rating separates individual field measurement circuits from the module electronics and helps maintain signal integrity in multi-channel temperature monitoring applications.\u003c\/p\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Allen-Bradley 1756-IRT8I ControlLogix 8 Point RTD Thermocouple Input Module\u003c\/li\u003e\n\u003cli\u003e1 x ControlLogix compatible input module assembly\u003c\/li\u003e\n\u003cli\u003eStandard module identification label and terminal interface\u003c\/li\u003e\n\u003cli\u003eControlLogix chassis, power supply, and field sensors are not included unless separately specified\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm the module revision and ControlLogix chassis compatibility before installation.\u003c\/li\u003e\n\u003cli\u003eSelect the correct input configuration for RTD, thermocouple, or millivolt signals.\u003c\/li\u003e\n\u003cli\u003eUse shielded sensor wiring where required by the installation environment.\u003c\/li\u003e\n\u003cli\u003eMaintain separation between temperature signal cables and high-voltage power conductors.\u003c\/li\u003e\n\u003cli\u003eVerify thermocouple polarity and sensor wiring before controller startup.\u003c\/li\u003e\n\u003cli\u003eCheck module diagnostics and input values after commissioning.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFirmware and Network Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe 1756-IRT8I operates within the ControlLogix hardware ecosystem where module firmware, Logix controller configuration, and electronic keying settings must be matched. Correct firmware compatibility ensures proper temperature data exchange through the ControlLogix backplane.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat signals does the 1756-IRT8I support?\u003c\/p\u003e\n\u003cp\u003eThe module supports isolated RTD, thermocouple, and millivolt input signals through eight independent channels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow many temperature input channels are available?\u003c\/p\u003e\n\u003cp\u003eThe module provides 8 isolated input channels for temperature measurement applications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhich thermocouple types are compatible?\u003c\/p\u003e\n\u003cp\u003eSupported types include B, C, D, E, J, K, N, R, S, T, and TXK\/XK (L).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the module power dissipation?\u003c\/p\u003e\n\u003cp\u003eThe maximum power dissipation is 4.6 W during operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the backplane current requirement?\u003c\/p\u003e\n\u003cp\u003eThe module requires 200 mA at 5.1 VDC and 150 mA at 24 VDC.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the module provide channel isolation?\u003c\/p\u003e\n\u003cp\u003eYes. The module provides isolated input channels with 250 V continuous isolation rating.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat data format is used by the module?\u003c\/p\u003e\n\u003cp\u003eThe module transfers measurement data using IEEE 32-bit floating point format.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the module require configuration before use?\u003c\/p\u003e\n\u003cp\u003eYes. Input type selection, controller configuration, and module parameters must be set before operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066416222381,"sku":"1756-IRT8I","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/allen-bradley_1756-irt8i_1.jpg?v=1786349750","url":"https:\/\/www.maxwellplc.com\/products\/1756-irt8i-allen-bradley-controllogix-8-point-input-module","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}