{"product_id":"allen-bradley-1790d-tn4v0-compactblock-ldx-4-a-i-base-block","title":"Allen-Bradley 1790D-TN4V0 CompactBlock LDX 4 A\/I Base Block","description":"\u003cp\u003eConfigured for analog voltage signal acquisition in DeviceNet distributed control networks, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1790D-TN4V0\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1790D-TN4V0\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCompactBlock LDX 4 A\/I Base Block) provides direct physical signal processing for 4 single-ended input channels. The hardware executes unipolar analog-to-digital conversion at 12-bit resolution to maintain data integrity across the fieldbus communication interface.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1790D-TN4V0\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAllen-Bradley\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOrigin\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUSA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eWeight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.85 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eShipping Dimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e11 x 5.5 x 4.2 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOperating Temp\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 55 deg C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePower Consumption\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.2 W max @ 28.8 VDC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInput Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 (Single-ended, non-isolated)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInput Voltage Range\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 10 V\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eResolution\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e12 bits (unipolar)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eConversion Time\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e10 ms per channel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInput Impedance\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e500 k ohms (min)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eIndustrial Control Integration and Scalability\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1790D-TN4V0\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions within the DeviceNet ecosystem, utilizing deterministic communication protocols to manage field I\/O data. The modularity of the CompactBlock LDX platform allows for efficient I\/O density scaling during network configuration. Firmware compatibility ensures that the analog data registers are correctly mapped and processed by the primary controller, supporting high-speed cyclic data exchange while maintaining the precision required for voltage-based industrial instrumentation.\u003c\/p\u003e\n\u003ch3\u003eField Installation Procedures\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eMounting: Secure the base block to a flat surface or DIN rail using the provided enclosure mounting points.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWiring: Connect analog voltage signals to the specified input terminals, ensuring that all signal wiring is kept at least 15 cm away from high-voltage AC cables.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGrounding: Terminate cable shields at a central ground reference to mitigate electromagnetic interference, as the inputs are non-isolated.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePower: Supply 24 VDC (11 to 28.8 VDC range) to the module power terminals and verify voltage levels before initializing DeviceNet communications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEnclosure: Maintain the IP20 rating by ensuring all field connectors are fully seated and protected from environmental debris.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eContents: One (1) 1790D-TN4V0 Base Block.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdditional requirements: Requires a standard DeviceNet trunk line cable and mating connectors for I\/O signal termination.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Technical Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Are the 4 analog input channels galvanically isolated from each other?\u003c\/p\u003e\n\u003cp\u003eA: No, the 1790D-TN4V0 features 4 single-ended, non-isolated input channels that share a common ground reference.\u003c\/p\u003e\n\u003cp\u003eQ: Can this module be hot-swapped while the DeviceNet network is active?\u003c\/p\u003e\n\u003cp\u003eA: This module does not support hot-swapping; power must be disconnected from the base block before removal to prevent potential damage to the DeviceNet bus interface.\u003c\/p\u003e\n\u003cp\u003eQ: How is the input signal processed for accuracy?\u003c\/p\u003e\n\u003cp\u003eA: The module uses a 12-bit unipolar Sigma-Delta conversion method to transform 0-10 V signals into digital values, ensuring an overall accuracy of 0.2% full scale across the operating temperature range.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066453807277,"sku":"1790D-TN4V0","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/allenbradley_1790d-tn4v0_2.jpg?v=1780564957","url":"https:\/\/www.maxwellplc.com\/products\/allen-bradley-1790d-tn4v0-compactblock-ldx-4-a-i-base-block","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}