{"product_id":"1756-of8-allen-bradley-controllogix-8-channel-analog-output-module","title":"Module de sortie analogique 8 canaux ControlLogix Allen-Bradley 1756-OF8","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eProduct Overview and Precision Control\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-OF8 (1756OF8)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-density, versatile\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAnalog Output Module\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ebelonging to the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eControlLogix\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efamily. It provides\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e8 non-isolated channels\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecapable of delivering high-precision voltage or current signals to field devices. Designed for demanding applications such as variable frequency drive (VFD) speed control, valve positioning, and actuator modulation, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-OF8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoffers sub-millisecond updates and high-resolution digital-to-analog conversion. This module is a cornerstone for closed-loop process control, allowing for seamless integration of analog field equipment into the Logix Integrated Architecture.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eHardware Architecture and Signal Flexibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-OF8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoccupies a single slot in any 1756 ControlLogix chassis and interfaces with the processor via the high-speed backplane.\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSelectable Output Modes:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEach of the 8 channels can be individually configured for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eVoltage (+\/- 10V)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eor\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCurrent (0 to 20 mA or 4 to 20 mA)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Resolution:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFeatures a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e15-bit resolution\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eacross all ranges (approx. 320 uV per count for voltage and 0.65 uA per count for current), providing the granularity needed for sensitive flow or pressure control.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFast Update Rates:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eOffers a RPI (Requested Packet Interval) as low as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e2 ms\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor all 8 channels, ensuring that control commands are executed with minimal latency.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIntegrated Diagnostics:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIncludes hardware features for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eOpen Wire Detection\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(in current mode) and\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eShort Circuit Protection\u003c\/strong\u003e, providing real-time feedback to the controller regarding field-side health.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\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\u003eModel\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e1756-OF8\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eAllen-Bradley \/ Rockwell Automation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\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 Non-isolated\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eVoltage Range\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e+\/- 10 VDC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCurrent Range\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\u003eResolution\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e15-bit (plus sign)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBackplane Current (5V)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e150 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBackplane Current (24V)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e120 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Settling Time\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u0026lt; 2 ms (Typical)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 60 Celsius\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eShipping Weight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e1.0 kg\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eIntegrated Technical FAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 1756-OF8 provide channel-to-channel isolation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-OF8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003enon-isolated\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emodule, meaning all 8 channels share a common return. If your application requires independent grounding for each signal (to prevent ground loops between different drives), you should utilize the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-OF8I\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(Isolated) module instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat happens to the outputs if the PLC enters a Fault state or is switched to Program mode?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module features configurable\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e\"Program Mode\" and \"Fault Mode\" behaviors\u003c\/strong\u003e. Within the Studio 5000 software, you can choose to have each output hold its last value, switch to a specific safe state (e.g., 4 mA), or go to the minimum\/maximum of its range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I calibrate the 1756-OF8 in the field?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The module supports\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efield calibration\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethrough the software. Using a high-precision voltmeter or ammeter, you can adjust the offset and gain parameters for each channel to account for environmental factors or long cable runs.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eEngineering \u0026amp; Installation Protocols\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWiring Arm Compatibility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis module requires a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-TBNH\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(20-pin) or\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-TBSH\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(Spring clamp) Removable Terminal Block (RTB). Always ensure the RTB is fully seated and the locking tab is engaged before applying field power.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCurrent Loop Resistance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWhen operating in current mode (4-20 mA), ensure the total loop impedance (wire resistance plus the load) does not exceed\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e550 Ohms\u003c\/strong\u003e. Exceeding this limit will prevent the module from reaching the full 20 mA output.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eShielding Strategy:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFor high-resolution analog control, use\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eshielded twisted-pair (STP)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecables. Terminate the shield at the ground bar of the ControlLogix chassis. Avoid grounding the shield at the field device end to prevent ground loops that introduce signal noise.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eEngineering Advantages\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-OF8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eexcels in\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eControl System Density\u003c\/strong\u003e. By providing 8 channels in a single slot, it reduces the total chassis footprint and hardware costs for systems with high analog counts. Its ability to perform\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eDigital-to-Analog conversion\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003elocally on the module allows the main processor to focus on high-level logic, while the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-OF8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ehandles the precise electrical ramp-up and ramp-down of signals. This makes it an ideal choice for the chemical, food and beverage, and power generation industries, where reliability and precise modulation of process variables are non-negotiable.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52695191650667,"sku":"Allen Bradley 1756-OF8","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/allen-bradley-1756-of8-controllogix-8-pt-a-o-i-or-v-module-etawkyw3sxm_f87e85f3-4474-41e8-a6dd-ecaa3415a39a.jpg?v=1766114654","url":"https:\/\/www.plcprotech.com\/fr\/products\/1756-of8-allen-bradley-controllogix-8-channel-analog-output-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}