{"product_id":"1756-of8-rockwell-automation-15-bit-analog-output-unit","title":"1756-OF8 Rockwell Automation 15-Bit Analog Output Unit","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-OF8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003estands as a cornerstone for precision signal delivery within the ControlLogix ecosystem. This high-density module provides eight individually configurable outputs, allowing engineers to drive actuators, control valves, and variable frequency drives (VFDs) with exceptional accuracy. By supporting both ±10V voltage and 0–20 mA current loops, the 1756-OF8 simplifies inventory and design by handling diverse field device requirements within a single chassis slot.\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003e\u003cstrong\u003eCondition Statement:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWe supply this 1756-OF8 in\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New, Factory Sealed\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003econdition, ensuring maximum reliability and the full integrity of its internal R-Ladder DAC architecture.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe 1756-OF8 utilizes a monotonic R-Ladder Digital-to-Analog Converter (DAC) to eliminate missing codes and ensure smooth signal transitions.\u003c\/p\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\u003eDetails\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\u003eOutput Channels\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8 Voltage or Current (individually configurable)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Ranges\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e±10.4V DC, 0–21 mA, 4–20 mA\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\u003e15-bit (320 µV\/bit or 650 nA\/bit)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSettling Time\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u0026lt; 2 ms to 95% of final value (resistive loads)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCalibrated Accuracy\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBetter than 0.05% of range @ 25°C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eIsolation Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e250V continuous (Channels-to-Backplane)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBackplane Current\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e150 mA @ 5.1V DC \/ 210 mA @ 24V DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDrive Capability\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u0026gt;2000 Ω (Voltage); 0–750 Ω (Current)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProtection\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eShort-circuit (≤21 mA) and 24V Overvoltage\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eRTB Options\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1756-TBNH or 1756-TBSH\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\u003cp\u003eThe 1756-OF8 addresses critical industrial pain points through high-performance circuitry and robust hardware design:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEliminate Signal Lag:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module achieves a settling time of less than 2 ms. This fast response enables high-speed PID loops to stabilize quicker, significantly improving the performance of dynamic motion and flow control applications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePrecision Actuation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e15-bit resolution provides the fine-grained control necessary for sensitive dosing pumps and precision positioning valves, minimizing process variability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt-in Loop Diagnostics:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1756-OF8 includes open-circuit detection for current outputs. If a wire breaks or a device fails, the module immediately flags the error to the controller, reducing troubleshooting downtime.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThermal Efficiency:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDespite its high density, the module manages power dissipation effectively (as low as 3.15 W depending on load), preventing heat buildup within the ControlLogix chassis and extending the life of adjacent modules.\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 mix voltage and current outputs on the same module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The 1756-OF8 allows you to configure each of the eight channels independently via Studio 5000 software. You can drive a 4-20 mA valve on Channel 0 and a 0-10V VFD reference on Channel 1 simultaneously.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 1756-OF8 require external power?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhile the module draws 210 mA at 24V DC from the ControlLogix backplane, the actual field-side signals are powered through the chassis. Ensure your 1756 power supply has sufficient capacity for the combined current draw of all installed modules.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should I calibrate the 1756-OF8?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRockwell Automation recommends a typical calibration interval of 12 months to maintain the 0.05% accuracy specification, especially in environments with significant temperature fluctuations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between Series A and Series B?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSeries A is the original design. While newer series may offer minor component updates or firmware enhancements, the core technical specs like the 2 ms settling time and 15-bit resolution remain compatible for drop-in replacements.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":43374550483034,"sku":"1756-0F8","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/2._45f23496-bcd1-40f6-8891-a65fc9ffe4fe.jpg?v=1778748549","url":"https:\/\/www.spareoil.com\/products\/1756-of8-rockwell-automation-15-bit-analog-output-unit","provider":"SpareOil Automation","version":"1.0","type":"link"}