{"product_id":"1791-ndv-industrial-automation-module-by-allen-bradley","title":"1791-NDV Industrial Automation Module by Allen-Bradley","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1791-NDV is a compact analog block I\/O module engineered for distributed control applications. With 4 input channels and 2 voltage output channels, this unit consolidates signal acquisition and actuation into a single, space-saving enclosure. Designed for PLC systems, the 1791-NDV operates on 24 VDC and delivers reliable performance in demanding industrial environments.\u003c\/p\u003e\u003ch2\u003eKey Technical 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\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Line\u003c\/td\u003e\n\u003ctd\u003e1791 Block I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1791-NDV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUpdate Rate\u003c\/td\u003e\n\u003ctd\u003e108 ms per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance\u003c\/td\u003e\n\u003ctd\u003e10 MΩ (voltage), 250 Ω (current)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAbsolute Accuracy\u003c\/td\u003e\n\u003ctd\u003e0.1% at 25°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLinearity\u003c\/td\u003e\n\u003ctd\u003e0.05% at 25°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Impedance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 1 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e14 bits full scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Bandwidth\u003c\/td\u003e\n\u003ctd\u003e5 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOvervoltage Protection\u003c\/td\u003e\n\u003ctd\u003e140 VAC (input\/output)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal Power Voltage\u003c\/td\u003e\n\u003ctd\u003e19.2 – 30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Rating\u003c\/td\u003e\n\u003ctd\u003e600 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e11.52 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e39.28 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.19 lbs (0.54 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (W x D x H)\u003c\/td\u003e\n\u003ctd\u003e2.7 x 3.85 x 6.95 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e5 to 95% non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003ePerformance and Reliability\u003c\/h2\u003e\u003cp\u003eThe 1791-NDV delivers an update rate of 108 ms per channel, making it suitable for processes that require moderate response times. Its 14-bit resolution ensures precise signal conversion, while the absolute accuracy of 0.1% at 25°C guarantees dependable measurement. The module features overvoltage protection up to 140 VAC, safeguarding connected equipment from voltage spikes. With an output impedance of less than 1 Ω and indefinite short-circuit protection, the 1791-NDV ensures stable output driving and robust fault tolerance.\u003c\/p\u003e\u003ch2\u003eApplications and Use Cases\u003c\/h2\u003e\u003cp\u003eThis Allen-Bradley 1791-NDV module is ideal for applications such as:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eProcess control systems requiring analog signal conditioning\u003c\/li\u003e\n\u003cli\u003eMachine automation where compact I\/O blocks are needed\u003c\/li\u003e\n\u003cli\u003eRemote monitoring stations that demand reliable data acquisition\u003c\/li\u003e\n\u003cli\u003eLegacy system upgrades where space is limited\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIts 4 inputs and 2 outputs allow you to handle sensor readings and actuator commands from a single unit, reducing wiring complexity and panel space.\u003c\/p\u003e\u003ch2\u003eInstallation and Setup\u003c\/h2\u003e\u003cp\u003eMount the Allen-Bradley 1791-NDV on a standard DIN rail or panel using the integrated mounting slots. Ensure the supply voltage is within 19.2 to 30 VDC and that the current draw does not exceed 600 mA. Connect input signals to the designated terminals, observing polarity. For current inputs, use the internal 250 Ω shunt; for voltage inputs, the 10 MΩ impedance is already present. Verify that the ambient temperature stays within 0 to 60°C and that humidity remains non-condensing between 5% and 95%. Tighten all connections to the recommended torque and perform a continuity check before powering up.\u003c\/p\u003e\u003ch2\u003eMaintenance and Longevity\u003c\/h2\u003e\u003cp\u003ePeriodically inspect the 1791-NDV for dust accumulation and ensure that ventilation is not obstructed. Check wiring for signs of wear or corrosion, especially in humid environments. The module's solid-state design has no moving parts, which minimizes mechanical failure. With proper environmental control, this Allen-Bradley module can provide years of trouble-free service, reducing downtime and replacement costs.\u003c\/p\u003e\u003ch2\u003eSelection Guide\u003c\/h2\u003e\u003cp\u003eWhen purchasing the 1791-NDV, verify that your control system accepts analog block I\/O modules and that the input\/output voltage ranges match your field devices. Confirm that the 24 VDC power supply can deliver the required 600 mA. This unit is a direct replacement for many older 1791 series modules. For guaranteed quality and reliable sourcing, choose PLC Source PRO as your trusted supplier for industrial automation spares.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default","offer_id":44453947474019,"sku":"1791-NDV","price":235.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/1791-0A16-c1_2bb5ee5d-e317-4541-bb9d-c9d82d9499a4.jpg?v=1786113737","url":"https:\/\/www.plcsourcepro.com\/ar\/products\/1791-ndv-industrial-automation-module-by-allen-bradley","provider":"PLC Source PRO","version":"1.0","type":"link"}