{"product_id":"1756-of8-allen-bradley-controllogix-analog-output-module-new","title":"1756-OF8 Allen-Bradley ControlLogix Analog Output Module New","description":"\u003ch3\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0056b3;\"\u003e1756-OF8\u003c\/strong\u003e operates as an 8-channel analog current and voltage output module designed for the \u003cstrong style=\"color: #0056b3;\"\u003eAllen-Bradley\u003c\/strong\u003e \u003cstrong style=\"color: #0056b3;\"\u003eControlLogix\u003c\/strong\u003e architecture. Built by \u003cstrong style=\"color: #0056b3;\"\u003eRockwell Automation\u003c\/strong\u003e, this high-resolution module delivers precise signal modulation for variable speed drives, control valves, and field instrumentation in demanding industrial automation setups.\u003c\/p\u003e\n\u003cp\u003eEvery channel on the \u003cstrong style=\"color: #0056b3;\"\u003e1756-OF8\u003c\/strong\u003e module provides software-configurable signal ranges spanning +\/-10V DC or 0-20 mA. Operating across a 15-bit resolution spectrum, it processes dynamic control loops with scan speeds down to 8 ms in integer mode and 12 ms in floating-point mode.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eEngineering Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe table below organizes critical electrical, timing, and mechanical performance metrics using MECE classification principles for direct technical comparison.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e \u003cstrong style=\"color: #0056b3;\"\u003eAllen-Bradley\u003c\/strong\u003e \/ \u003cstrong style=\"color: #0056b3;\"\u003eRockwell Automation\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatalog Number:\u003c\/strong\u003e \u003cstrong style=\"color: #0056b3;\"\u003e1756-OF8\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Series:\u003c\/strong\u003e \u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-1756-controllogix\"\u003e\u003cstrong style=\"color: #0056b3;\"\u003eControlLogix\u003c\/strong\u003e\u003c\/a\u003e System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Type:\u003c\/strong\u003e Analog Output Module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Channels:\u003c\/strong\u003e 8 individual points (Current or Voltage configurable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Voltage Range:\u003c\/strong\u003e +\/-10V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Current Range:\u003c\/strong\u003e 0 to 20 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital Signal Resolution:\u003c\/strong\u003e 15-bit across 10.4V (320 µV\/bit) and 21 mA (650 nA\/bit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Scan Time:\u003c\/strong\u003e 8 ms (Integer mode) \/ 12 ms (32-bit Floating Point mode)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Module Error:\u003c\/strong\u003e 0.15% full scale (Voltage) \/ 0.30% full scale (Current)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDAC Conversion Method:\u003c\/strong\u003e R-Ladder DAC with monotonicity and no missing codes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Current Draw:\u003c\/strong\u003e 140 mA at 5V DC \/ 210 mA at 24V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Power Dissipation:\u003c\/strong\u003e 4.9 Watts at 60 °C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCircuit Protection:\u003c\/strong\u003e Current limited to 21 mA or less; short circuit and 24V DC overvoltage protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolation Voltage:\u003c\/strong\u003e 250V continuous reinforced isolation (tested at 1350V AC for 2 seconds channel-to-backplane)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Drift Rate:\u003c\/strong\u003e Offset drift 50 ppm\/°C; Gain drift 25 ppm\/°C (voltage) \/ 50 ppm\/°C (current)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Wiring Block:\u003c\/strong\u003e 1756-TBNH (18-pin spring) or 1756-TBSH (20-pin cage clamp)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire Conductor Size:\u003c\/strong\u003e 0.33 to 2.1 mm² (22 to 14 AWG) copper rated at 105 °C minimum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Environmental Limits:\u003c\/strong\u003e Temperature 0 to 60 °C (32 to 140 °F); Shock 30G; Vibration 2G at 10-500 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Hazardous Ratings:\u003c\/strong\u003e Class I Div 2 Groups A,B,C,D (T4A North America, T4 ATEX\/IEC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Product Identifiers:\u003c\/strong\u003e UPC 10612598171894 and UNSPSC 32151705\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eWiring \u0026amp; Mechanical Installation Procedures\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eExecuting proper mechanical and electrical installation prevents ground loops and signal interference on industrial field wiring.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDe-energize the \u003cstrong style=\"color: #0056b3;\"\u003eControlLogix\u003c\/strong\u003e chassis backplane power supply prior to module insertion or extraction.\u003c\/li\u003e\n\u003cli\u003eAlign the \u003cstrong style=\"color: #0056b3;\"\u003e1756-OF8\u003c\/strong\u003e printed circuit board with top and bottom chassis guides in any available slot.\u003c\/li\u003e\n\u003cli\u003eSlide the module inward until side locking tabs engage cleanly with the backplane connector.\u003c\/li\u003e\n\u003cli\u003eSelect shielded twisted-pair cabling when wiring 0-20 mA current loops to minimize EMI coupling.\u003c\/li\u003e\n\u003cli\u003eTerminate wiring using either the 1756-TBNH or 1756-TBSH removable terminal block assembly.\u003c\/li\u003e\n\u003cli\u003eTorque terminal block screws to manufacturer specification and snap the protective front door closed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eHardware Diagnostics \u0026amp; Protection Systems\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0056b3;\"\u003e1756-OF8\u003c\/strong\u003e incorporates built-in hardware protection to safeguard internal output drivers and connected equipment during field faults.\u003c\/p\u003e\n\u003cp\u003eIntegrated electronic current limiters restrict maximum current output to 21 mA or less during short-circuit conditions. Open-circuit detection monitors field loops when configured in current output mode, while overvoltage clamping handles back-fed surges up to 24V DC without damaging internal electronics.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTarget Equipment \u0026amp; Field Applications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eControl engineers specify the \u003cstrong style=\"color: #0056b3;\"\u003e1756-OF8\u003c\/strong\u003e inside automated processing environments where exact command signals drive final control elements.\u003c\/p\u003e\n\u003cp\u003eIt directly interfaces with variable frequency drives (VFDs) for speed reference modulation, modulating control valves in fluid management, proportional servo amplifiers, and chart recorders. Typical industries include petrochemical refining, paper conversion, power generation, and continuous metals processing.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eGlobal PLC Spare HUB's Insight \u0026amp; Field Experience\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eOur control systems division evaluates hundreds of industrial I\/O modules operating under severe plant conditions. The \u003cstrong style=\"color: #0056b3;\"\u003e1756-OF8\u003c\/strong\u003e exhibits exceptional backplane isolation, shielding sensitive logic processors from high-voltage transients induced on field wiring cables.\u003c\/p\u003e\n\u003cp\u003eIn a continuous chemical batching process, an engineering team experienced intermittent zero-point drift on analog valve positioning. Troubleshooting revealed high common-mode noise generated by adjacent high-horsepower VFD motor leads. Swapping to the 1756-TBSH shielded terminal block and landing cable shields exclusively at the cabinet single-point ground eliminated noise induction. We strongly advise utilizing shielded twisted-pair conductors with single-point grounding when driving voltage references over 50 feet.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSystem Selection \u0026amp; Integration Guidance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eVerifying module requirements prior to ordering ensures seamless software setup inside Studio 5000 or RSLogix 5000 programming tools.\u003c\/p\u003e\n\u003cp\u003eChoose the \u003cstrong style=\"color: #0056b3;\"\u003e1756-OF8\u003c\/strong\u003e when 8 standard non-isolated analog output channels satisfy system requirements. If your process requires channel-to-channel isolation to prevent loop interference without external isolators, evaluate the 1756-OF8I isolated variant instead. Always calculate total backplane current draw against power supply capacity when adding expansion I\/O to existing chassis layouts.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eShipping Terms \u0026amp; 12-Month Warranty Coverage\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eUnits are sealed inside static-shielding antistatic packaging and packed inside heavy-wall shipping containers with custom foam dampening.\u003c\/p\u003e\n\u003cp\u003eEvery unit includes a comprehensive 12-month hardware replacement warranty covering functional performance and internal component reliability. Emergency orders process rapidly with international dispatch within 24 to 48 hours via premium express carriers like FedEx, UPS, or DHL.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the conversion resolution of output channels on the 1756-OF8 module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module features 15-bit resolution across both ranges, delivering 320 µV per bit in voltage mode (+\/-10V) and 650 nA per bit in current mode (0-20 mA).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich removable terminal block options work with this analog module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis unit requires either a 1756-TBNH 18-pin standard housing block or a 1756-TBSH 20-pin spring clamp terminal block for field wiring connections.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the module respond to an open-circuit fault in current mode?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen operating in current loop mode, internal electronics detect high resistance or broken wiring, triggering software fault bits inside the controller data table.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan voltage and current output modes operate simultaneously on different channels?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, each channel is independently configured within software, allowing a mix of voltage-driven drives and current-driven control valves on a single unit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the standard order lead time and delivery schedule?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eShipments depart within 24 to 48 hours following order confirmation using express courier services including FedEx, UPS, and DHL.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013982937270,"sku":"1756-OF8","price":141.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1756-OF8.jpg?v=1784702183","url":"https:\/\/www.plcsparehub.com\/products\/1756-of8-allen-bradley-controllogix-analog-output-module-new","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}