{"product_id":"allen-bradley-1756-of8i-controllogix-isolated-analog-output-module","title":"Allen-Bradley 1756-OF8I ControlLogix Isolated Analog Output Module","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-OF8I\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as a high-precision, channel-to-channel isolated analog output interface for the ControlLogix platform. It provides eight independent outputs capable of driving both voltage and current field devices, such as control valves, speed drives, and industrial actuators. We supply this unit in\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New, original condition\u003c\/strong\u003e, ensuring your mission-critical process loops benefit from the highest signal integrity and zero factory-wear.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\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\u003eNumber of Outputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8 Individually Isolated Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Current Ranges\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 20 mA; 4 to 20 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Voltage Ranges\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e±10V; 0 to 10V; 0 to 5V\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 to 16-Bit\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eConversion Method\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eR-Ladder DAC (Monotonicity with no missing codes)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eData Format\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIEEE 32-bit Floating Point\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\u003e50V Continuous (Channel-to-Channel \/ Field-to-Backplane)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOvervoltage Protection\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e±30V DC (Voltage\/Current)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCurrent Draw\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e400 mA @ 24V DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCompatible RTBs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1756-TBCH, 1756-TBS6H (36-pin)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eEngineering Advantages\u003c\/h2\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEliminate Ground Loop Interference:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1756-OF8I features true channel-to-channel isolation up to 50V. This architecture prevents electrical noise and ground potential differences from affecting adjacent outputs, which often causes signal drift in non-isolated modules.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSuperior Linearity with R-Ladder DAC:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module utilizes an R-Ladder Digital-to-Analog Converter. This conversion method ensures strict monotonicity with no missing codes, providing smooth, predictable control transitions for sensitive chemical dosing or high-accuracy pressure regulation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIntegrated Fault Diagnostics:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe hardware includes dedicated open-circuit detection for current loops and short-circuit detection for voltage outputs. These diagnostics alert the controller immediately if a field wire breaks or a device fails, reducing the time required for loop troubleshooting.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRobust Hardware Protection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eOnboard protection circuits withstand overvoltage conditions up to ±30V DC. This safeguard prevents internal module failure if a technician accidentally cross-wires the output terminals to a 24V power rail.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFlexible Data Handling:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module supports IEEE 32-bit floating point data. This eliminates the need for complex scaling blocks in the ladder logic, as the controller sends engineering units directly to the module for conversion.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHow does \"Channel-to-Channel Isolation\" benefit my installation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUnlike standard modules that share a common return, the 1756-OF8I isolates every channel. This allows you to connect devices powered by different external sources or located in different areas of the plant without risking cross-talk or hardware damage from common-mode voltages.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhich Removable Terminal Block (RTB) should I use?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis module requires a 36-pin RTB. You can choose the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-TBCH\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(Cage Clamp) or the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-TBS6H\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(Spring Clamp) depending on the vibration levels of your environment and your wiring preference.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan this module drive both a VFD (Voltage) and a Valve (Current) simultaneously?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. You can configure each of the 8 channels independently. One channel can output a 4-20mA signal while another outputs ±10V, providing maximum flexibility for diverse I\/O racks.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a factory-sealed unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. We guarantee this 1756-OF8I is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e. It arrives in its original Allen-Bradley factory packaging with intact security seals, ensuring you receive the latest hardware revision for your ControlLogix system.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53133962543288,"sku":"1756-OF8I","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1756-OF8I_ab0b6574-2bb4-430e-a9bf-f14873ceb096.jpg?v=1774606564","url":"https:\/\/www.globalpetroparts.com\/products\/allen-bradley-1756-of8i-controllogix-isolated-analog-output-module","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}