{"product_id":"1790d-n4c0-industrial-automation-module-by-allen-bradley","title":"1790D-N4C0 Industrial Automation Module by Allen-Bradley","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1790D-N4C0 is a 4-channel analog current input module designed for precise current measurement in industrial control systems. Part of the compact 1790D series, this module accepts 4–20 mA or 0–20 mA signals with software configurability, making it a versatile choice for monitoring process variables such as pressure, flow, or temperature via transmitters.\u003c\/p\u003e\u003cp\u003eWith a 12-bit unipolar resolution and a rapid 10 ms per channel conversion time, the 1790D-N4C0 delivers reliable data acquisition for real-time control. Its nonisolated, single-ended inputs simplify wiring while maintaining a robust 0.2% full-scale accuracy across 0…55 °C.\u003c\/p\u003e\u003ch2\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 input channels\u003c\/strong\u003e – single-ended, nonisolated, ideal for cost-effective analog monitoring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoftware-configurable current ranges\u003c\/strong\u003e – 4…20 mA (default) or 0…20 mA to match your sensor output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-resolution conversion\u003c\/strong\u003e – 12-bit unipolar (1\/4096 max) with 3.90 µA\/bit (4…20 mA) or 4.88 µA\/bit (0…20 mA).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast scan rate\u003c\/strong\u003e – 10 ms per channel ensures timely process updates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in DeviceNet power\u003c\/strong\u003e – 24V dc nominal (11…28.8V dc range) simplifies wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhotocoupler isolation\u003c\/strong\u003e – between I\/O and logic, rated 1250V ac rms for 60 s.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs per module\u003c\/td\u003e\n\u003ctd\u003e4 channel single-ended, nonisolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput current (software configurable)\u003c\/td\u003e\n\u003ctd\u003e4…20 mA (default), 0…20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e12 bits unipolar, 1\/4096 max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion data\u003c\/td\u003e\n\u003ctd\u003eBinary 0000 to 0fff (max scale)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion time\u003c\/td\u003e\n\u003ctd\u003e10 ms\/channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall accuracy\u003c\/td\u003e\n\u003ctd\u003e0.2% full scale @ 0…55 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration\u003c\/td\u003e\n\u003ctd\u003eNone required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput impedance\u003c\/td\u003e\n\u003ctd\u003e249 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulation resistance\u003c\/td\u003e\n\u003ctd\u003e20 MΩ min @ 250V dc (between insulated circuits)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDeviceNet power supply voltage\u003c\/td\u003e\n\u003ctd\u003e24V dc nominal, range 11…28.8V dc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDeviceNet power dissipation\u003c\/td\u003e\n\u003ctd\u003e1.2 W max @ 28.8V dc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField power supply voltage\u003c\/td\u003e\n\u003ctd\u003e24V dc nominal, range 21.6…26.4V dc (+10%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField power dissipation\u003c\/td\u003e\n\u003ctd\u003e1.5 W max @ 26.4V dc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eI\/O to logic: photocoupler isolation; Isolation voltage: Type Test 1250V ac rms for 60 s; DeviceNet to logic: nonisolated; Field power: nonisolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicators\u003c\/td\u003e\n\u003ctd\u003e4 red\/green I\/O status\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring\u003c\/td\u003e\n\u003ctd\u003e37-pin D-shell connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExpansion capability\u003c\/td\u003e\n\u003ctd\u003eAccommodates a maximum of two discrete expansion modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eReal-World Applications\u003c\/h2\u003e\u003cp\u003eThe 1790D-N4C0 excels in applications where accurate current loop monitoring is critical. Typical use cases include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess control\u003c\/strong\u003e – reading 4-20 mA signals from temperature, pressure, or level transmitters in chemical and food processing plants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachine monitoring\u003c\/strong\u003e – tracking motor current or hydraulic pressure to detect abnormal conditions early.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilding automation\u003c\/strong\u003e – integrating with HVAC systems to monitor air flow or water pressure.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIn each scenario, the module's fast conversion time and high accuracy ensure that controllers receive trustworthy data, reducing downtime and improving process efficiency.\u003c\/p\u003e\u003ch2\u003eInstallation \u0026amp; Setup Guidance\u003c\/h2\u003e\u003cp\u003eTo install the 1790D-N4C0, mount the module securely on a DIN rail or panel. Connect the DeviceNet power supply (24V dc nominal) and field power (24V dc nominal) to the designated terminals, observing polarity. Use the 37-pin D-shell connector for analog input wiring, ensuring that each current loop is properly terminated with the recommended 249 Ω input impedance in mind.\u003c\/p\u003e\u003cp\u003eConfigure the input range via software (4-20 mA or 0-20 mA) before commissioning. No calibration is required, but verify that the supply voltages remain within the specified ranges (DeviceNet: 11…28.8V dc; field: 21.6…26.4V dc). If expansion modules are needed, note that this base module supports up to two discrete expansion modules.\u003c\/p\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003eThanks to its solid-state design and lack of calibration requirements, the 1790D-N4C0 demands minimal maintenance. Periodically inspect the module for dust accumulation, especially in harsh environments, and ensure that all connectors remain tight. The photocoupler isolation protects the logic circuitry from voltage spikes, enhancing long-term reliability. With a typical lifespan of many years, this module offers excellent return on investment by minimizing downtime and replacement costs.\u003c\/p\u003e\u003ch2\u003eCompatibility \u0026amp; Integration\u003c\/h2\u003e\u003cp\u003eThe 1790D-N4C0 is designed to operate within the Allen-Bradley 1790D family and communicates over DeviceNet, a widely used industrial network. It integrates seamlessly with Allen-Bradley controllers that support DeviceNet, such as CompactLogix or ControlLogix with appropriate scanners. The module's nonisolated DeviceNet-to-logic interface means that proper grounding and shielding are essential for optimal performance in noisy industrial environments.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore purchasing the 1790D-N4C0, verify your system's power requirements and network compatibility. Confirm that your controller supports DeviceNet and that you have the necessary wiring accessories (e.g., 37-pin D-shell connector). If you plan to expand, ensure your application will not require more than two discrete expansion modules. For a reliable supply of genuine Allen-Bradley parts, consider PLC Source PRO, a trusted industrial automation parts supplier.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default","offer_id":44453901762659,"sku":"1790D-N4C0","price":280.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/1790D-0B16_1c70a7a1-948c-49b7-8fd2-cce4cb7ff580.jpg?v=1786108532","url":"https:\/\/www.plcsourcepro.com\/ar\/products\/1790d-n4c0-industrial-automation-module-by-allen-bradley","provider":"PLC Source PRO","version":"1.0","type":"link"}