{"product_id":"allen-bradley-1791-n4c2-block-i-o-4-channel-analog-input-output-module","title":"Allen Bradley 1791-N4C2 Block I\/O 4-Channel Analog Input\/Output Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen Bradley 1791-N4C2\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as a high-performance, standalone analog interface for distributed control systems. This compact block module combines data acquisition and signal output into a single rugged housing, eliminating the need for separate I\/O racks. It excels in applications requiring precise PID loop control, such as temperature regulation, flow measurement, and pressure monitoring. We supply this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e, factory-sealed, and ready for immediate deployment in mission-critical automation environments.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe 1791-N4C2 features a versatile 4-channel architecture designed for high-resolution signal processing.\u003c\/p\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\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAllen Bradley (Rockwell Automation)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eConfiguration\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 Channels (2 Analog Input \/ 2 Analog Output)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e16-bit (High Precision)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput\/Output Types\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eVoltage (0–10V DC, ±10V) or Current (4–20mA, ±20mA)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSystem Accuracy\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e±0.1% of Full Scale\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePower Requirement\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24V DC (Class 2 Power)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0°C to 60°C (32°F to 140°F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4.6 x 2.4 x 4.5 in (117 x 61 x 114 mm)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e35mm DIN Rail or Panel Mount\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.7 lbs (0.32 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUltra-High Resolution Control:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 16-bit converter architecture provides exceptional granularity for both input sensing and output modulation. This allows engineers to detect minute process fluctuations and apply precise corrections, significantly improving product quality in chemical and pharmaceutical manufacturing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDual-Signal Flexibility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSoftware-configurable channels support both voltage and current modes. This flexibility allows you to standardize on one spare part (1791-N4C2) to handle diverse field instruments, including 4–20mA transmitters and ±10V actuators, effectively reducing inventory overhead.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSpace-Optimized Footprint:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe \"Block\" design integrates the network adapter and I\/O circuitry into one small-form-factor device. This saves valuable DIN rail space in overcrowded remote terminal units (RTUs) and junction boxes compared to traditional modular chassis systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRapid Fault Isolation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module features a ruggedized design that withstands typical industrial EMI\/RFI interference. Its direct-mount capability near the field devices minimizes long analog cable runs, thereby reducing signal attenuation and noise pickup.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan I configure inputs and outputs independently on the 1791-N4C2?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The module allows you to configure each channel for either voltage or current signals based on your specific field device requirements. This ensures seamless integration with both older legacy sensors and modern high-speed actuators.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 1791-N4C2 require an external power supply for the analog loops?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module requires a 24V DC Class 2 power supply to drive its internal logic and signal processing. For the analog loops, the module manages the signal levels, but you must ensure the 24V DC supply provides sufficient current to maintain loop integrity across all four channels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat mounting options work best for high-vibration environments?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhile the 1791-N4C2 supports standard 35mm DIN rail mounting for quick installation, we recommend using the integrated panel mount points for high-vibration applications. Direct bolting to the backplane provides superior mechanical stability and ensures consistent electrical contact.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this module a suitable replacement for older 1791 analog blocks?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1791-N4C2 fits perfectly into existing Allen-Bradley Block I\/O architectures. However, always verify that your controller’s communication protocol (such as Remote I\/O) matches the block’s requirements to ensure full 16-bit data transparency and configuration support.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52787864043829,"sku":"1791-N4C2","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/1791-N4C2.png?v=1777257848","url":"https:\/\/www.5gplc.com\/products\/allen-bradley-1791-n4c2-block-i-o-4-channel-analog-input-output-module","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}