{"product_id":"1769-of8c-ab-compactlogix-8-channel-4-20ma-output-card","title":"1769-OF8C AB CompactLogix 8-Channel 4-20mA Output Card","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1769-OF8C\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivers high-density analog control for CompactLogix (1768\/1769) and MicroLogix 1500 controller series. This module provides eight high-resolution current output channels specifically engineered to drive modulating control valves, Variable Frequency Drives (VFDs), I\/P transducers, and valve positioners. By utilizing a 16-bit Digital-to-Analog Converter (DAC), the 1769-OF8C enables extreme precision in PID control loops where minute signal adjustments determine system stability. We offer this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoriginal factory stock to ensure maximum accuracy in your critical automated processes.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\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\u003eCatalog Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1769-OF8C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Configuration\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8 Single-ended Current Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eAnalog Range\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0–20 mA and 4–20 mA (Software Selectable)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDAC Resolution\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e16-bit\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eEffective Resolution\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e15.59 bits (4–20 mA) \/ 15.91 bits (0–20 mA)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eResolution Increment\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.323 µA per bit\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eConversion Rate\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5 ms (for all 8 channels)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eStep Response\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u0026lt; 2.9 ms (to 63% of output change)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMax Output Loading\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0–500 Ω\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eFull Scale Error\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e±0.35% at 25°C (77°F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBackplane Current Draw\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e145 mA @ 5.1V DC \/ 185 mA @ 24V DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePower Supply Distance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eWithin 8 slots of the power supply\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\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\u003eHigh-Granularity PID Control:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 16-bit resolution translates to increments as small as 0.323 µA. This precision allows the controller to make ultra-fine adjustments to valve positions or motor speeds, reducing process oscillation and improving final product consistency.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRapid Signal Conversion:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module converts and updates all eight channels within 5 ms. This fast execution ensures that the physical field devices respond nearly instantaneously to logic changes in the processor, which is essential for high-speed pressure or flow regulation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOptimized Hardware Density:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePacking eight current outputs into a single 1769 slot maximizes cabinet space. This high-density format reduces the number of expansion racks and communication adapters required for large-scale I\/O deployments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eVersatile Range Selection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSoftware-selectable ranges (0–20 mA or 4–20 mA) eliminate the need for physical jumpers. This allows engineers to reconfigure outputs on the fly for different field devices without opening the control panel or disturbing field wiring.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRobust Load Drive Capability:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module drives loads up to 500 Ω, providing sufficient power for long-distance cable runs to field instruments located far from the main control cabinet without signal degradation.\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 the 1769-OF8C drive voltage-based actuators (e.g., 0-10V)?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The 1769-OF8C is a dedicated current-sourced module (0-20mA\/4-20mA). To drive voltage devices, you would require a module like the 1769-OF8V or use a precision resistor at the load, though a dedicated voltage module is recommended for accuracy.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this module require an external 24V DC power source?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1769-OF8C draws its operating power directly from the 1769 backplane (145 mA @ 5.1V and 185 mA @ 24V). You must ensure your system power supply (e.g., 1769-PA2 or 1769-PB4) has sufficient capacity to support the total current draw of all modules in the bank.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 1769-OF8C compatible with the MicroLogix 1500?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The 1769 Compact I\/O platform serves as the expansion I\/O for the MicroLogix 1500 controller. The module connects directly to the right side of the processor or existing I\/O modules.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the significance of the \"Power Supply Distance Rating\"?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe rating of 8 modules means the 1769-OF8C must reside within 8 slots of the system power supply. Placing it further away can result in excessive voltage drop across the backplane, potentially causing intermittent signal errors or module failure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":42870828728410,"sku":"1769-OF8C","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/395_c80eade5-4da2-4848-a1c9-0524e088d69c.jpg?v=1772416302","url":"https:\/\/www.spareoil.com\/products\/1769-of8c-ab-compactlogix-8-channel-4-20ma-output-card","provider":"SpareOil Automation","version":"1.0","type":"link"}