{"product_id":"1756-of8h-8-channel-analog-output-module-allen-bradley-controllogix","title":"1756-OF8H 8-Channel Analog Output Module Allen-Bradley ControlLogix","description":"\u003ch3\u003eEngineering Overview \u0026amp; Architecture\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e**1756-OF8H**\u003c\/span\u003e is an advanced analog output module designed for the \u003cspan style=\"color: #0056b3;\"\u003e**ControlLogix**\u003c\/span\u003e controller platform by \u003cspan style=\"color: #0056b3;\"\u003e**Allen-Bradley**\u003c\/span\u003e (Rockwell Automation). Equipped with eight differential output channels and an integrated Highway Addressable Remote Transducer (HART) modem, the \u003cspan style=\"color: #0056b3;\"\u003e**1756-OF8H**\u003c\/span\u003e bridges high-level controller logic with intelligent field instruments to deliver precise current and voltage signals.\u003c\/p\u003e\n\u003ch3\u003eCore Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eModule Specification Detail\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer \u0026amp; Brand\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation \/ Allen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Series \u0026amp; Type\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e**\u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-1756-controllogix\"\u003eControlLogix\u003c\/a\u003e**\u003c\/span\u003e HART Analog Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Catalog Number\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e**1756-OF8H**\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channel Density\u003c\/td\u003e\n\u003ctd\u003e8 Differential channels supporting voltage or current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Output Ranges\u003c\/td\u003e\n\u003ctd\u003eCurrent: 0-20 mA or 4-20 mA; Voltage: +\/-10 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Resolution\u003c\/td\u003e\n\u003ctd\u003e15 to 16 bits across selectable ranges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Power Draw\u003c\/td\u003e\n\u003ctd\u003e230 mA @ 5.1 VDC and 230 mA @ 24 VDC (6.54W total)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage Rating\u003c\/td\u003e\n\u003ctd\u003e50V continuous (basic insulation tested at 1500V AC for 60s)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eOperational Modes \u0026amp; System Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eData Formatting:\u003c\/strong\u003e Supports integer mode (left-justified, 2's complement) alongside IEEE 32-bit floating-point data structures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Integration:\u003c\/strong\u003e Mounts directly into any standard 1756 ControlLogix chassis slot as a local or remote I\/O node.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Block Options:\u003c\/strong\u003e Accommodates Removable Terminal Blocks (RTB) such as 1756-TBNH, 1756-TBSH, or 1756-TBCH with mechanical keying.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Compatibility:\u003c\/strong\u003e Supports wire gauges from 22 to 14 AWG for single-wire configurations and 22 to 16 AWG for double-wire setups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Guidelines \u0026amp; Commissioning Convenience\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDe-energize the ControlLogix chassis backplane before sliding the module into your designated single chassis slot.\u003c\/li\u003e\n\u003cli\u003eAttach your chosen RTB (1756-TBNH\/TBSH) securely, ensuring proper torque on terminal screws to prevent loose field loops.\u003c\/li\u003e\n\u003cli\u003eVerify that HART communication loops are correctly terminated with proper loop resistance requirements before powering up.\u003c\/li\u003e\n\u003cli\u003eConfigure channel scaling, fault response behaviors, and open-circuit detection parameters within your programming environment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDiagnostic Capabilities \u0026amp; Industrial Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen Circuit Detection:\u003c\/strong\u003e Features built-in open-circuit detection for current output configurations when signal levels drop below 0.1 mA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Dissipation:\u003c\/strong\u003e Maintains operational stability with a power dissipation of 4.92W and thermal dissipation rating of 16.78 BTU\/hr.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e Complies with T4 North America, ATEX, and IEC hazardous environment temperature ratings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTarget Applications:\u003c\/strong\u003e Deployed in petrochemical refineries, pharmaceutical reactor control skids, and continuous pulp and paper processing lines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGlobal PLC Spare HUB's Insight\u003c\/h3\u003e\n\u003cp\u003eAutomation engineers commissioning the \u003cspan style=\"color: #0056b3;\"\u003e**1756-OF8H**\u003c\/span\u003e module frequently encounter communication drops if HART field device loop resistance falls outside the 250 to 500-ohm threshold. During a recent chemical plant overhaul, our engineering team resolved intermittent HART polling errors by inserting dedicated loop isolators, ensuring stable bi-directional digital communication over existing analog wiring.\u003c\/p\u003e\n\u003ch3\u003eLogistics, Packaging \u0026amp; Warranty Terms\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Inclusion:\u003c\/strong\u003e 1x \u003cspan style=\"color: #0056b3;\"\u003e**1756-OF8H**\u003c\/span\u003e ControlLogix HART Analog Output Module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFulfillment Schedule:\u003c\/strong\u003e Fast 24 to 48-hour order processing and dispatch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Logistics:\u003c\/strong\u003e Secure worldwide shipping handled via FedEx, UPS, and DHL.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Assurance:\u003c\/strong\u003e Fully backed by an industry-standard 12-month operational warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ) \u0026amp; Buying Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the settling time difference when operating with versus without the HART modem active?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Current settling time runs below 23 milliseconds without HART enabled, extending to under 37 milliseconds when the HART communication modem is actively polling field instruments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can individual output channels be isolated from one another on this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: No, module isolation is strictly maintained between the output channels and the backplane logic side; individual channels do not feature channel-to-channel isolation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does the module handle signal conversion internally?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: It uses an internal Digital-to-Analog Converter (DAC) based on an R-Ladder architecture, ensuring monotonic output conversion with zero missing codes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What environmental temperature and humidity limits apply during operation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The module operates reliably in temperatures ranging from 0 degrees Celsius to 60 degrees Celsius with a non-condensing relative humidity of 5% to 95%.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Buying Guide: When should I select the 1756-TBNH terminal block over the 1756-TBSH?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Choose the 1756-TBNH if your installation requires flexibility for double-wire connections (up to 14 AWG single-wire or 16 AWG double-wire), whereas the 1756-TBSH is restricted strictly to single-wire connections.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013910716598,"sku":"1756-OF8H","price":165.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1756-OF8H-3.jpg?v=1788938859","url":"https:\/\/www.plcsparehub.com\/products\/1756-of8h-8-channel-analog-output-module-allen-bradley-controllogix","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}