{"product_id":"1756-oa8-allen-bradley-controllogix-ac-output-module-order-now","title":"1756-OA8 Allen-Bradley ControlLogix AC Output Module | Order Now","description":"\u003ch3\u003e\u003cstrong\u003eAllen-Bradley \u003cstrong\u003e1756-OA8\u003c\/strong\u003e ControlLogix Digital AC Output Module Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Allen-Bradley \u003cstrong\u003e1756-OA8\u003c\/strong\u003e serves as a robust 8-point digital AC output module engineered to switch high-voltage loads ranging from 74 to 265 VAC within industrial ControlLogix architectures. Divided into two isolated groups of four channels, this module allows separate voltage tiers (such as 120VAC and 240VAC) to operate simultaneously on a single hardware card. Global PLC Spare HUB's Insight highlights this module for its flexible channel isolation, reliable programmable output delay filtering, and seamless rack integration in demanding heavy industrial control cabinets.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eModel \u003cstrong\u003e1756-OA8\u003c\/strong\u003e Configuration \u0026amp; Technical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer \u0026amp; Brand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation \/ Allen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Series \u0026amp; Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-1756-controllogix\"\u003eControlLogix\u003c\/a\u003e Discrete Digital AC Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExact Catalog Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e1756-OA8\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e74 to 265 VAC (47 to 63 Hz frequency band)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChannel Structure \u0026amp; Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8 points total, configured in 2 isolated groups of 4 channels each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Current Ratings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 Amps max per point; 5 Amps max per module at 30°C (linear derating to 4A at 60°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBackplane Power \u0026amp; Draw\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200 mA at 5.1 VDC; 2 mA at 24 VDC; 5.1 Watts max power dissipation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Terminal Blocks\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1756-TBCH, 1756-TBNH, 1756-TBSH Removable Terminal Blocks (RTB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eDiagnostic Capabilities \u0026amp; Switching Performance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProgrammable output delay filtering supporting 9.3 milliseconds at 60 Hz and 11 milliseconds at 50 Hz.\u003c\/li\u003e\n\u003cli\u003eLast-state hold capabilities configured for both On-state and Off-state modes during fault or program transitions.\u003c\/li\u003e\n\u003cli\u003eSurge current protection handling up to 20 Amps for 43 milliseconds, repeatable every 2 seconds at 60°C.\u003c\/li\u003e\n\u003cli\u003eScheduled output synchronization within 16.7 microseconds for time-critical AC switching applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eCompatible Equipment \u0026amp; Industrial Application Sectors\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAllen-Bradley 1756 ControlLogix chassis racks including 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17.\u003c\/li\u003e\n\u003cli\u003eInductive and resistive loads such as heavy-duty control relays, motor contactors, solenoids, and alarm sirens.\u003c\/li\u003e\n\u003cli\u003eManufacturing assembly lines and automated material handling conveyor systems.\u003c\/li\u003e\n\u003cli\u003ePower generation balance-of-plant distribution and municipal wastewater treatment switching panels.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003ePackaging, Warranty \u0026amp; Logistics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIndustrial-grade electrostatic and shock-resistant packaging designed to protect electronic terminal pins.\u003c\/li\u003e\n\u003cli\u003eComprehensive 12-month standard warranty covering structural and component manufacturing defects.\u003c\/li\u003e\n\u003cli\u003eRapid 24-48 hour order processing and dispatch window.\u003c\/li\u003e\n\u003cli\u003eGlobal delivery services fulfilled via premium logistics carriers including FedEx, UPS, and DHL.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the primary engineering benefit of the split-group architecture on the \u003cstrong\u003e1756-OA8\u003c\/strong\u003e module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt features two independent groups of four channels with uncommitted commons, allowing one group to switch 120 VAC while the other switches 240 VAC simultaneously.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is external fusing strongly recommended when installing this AC output module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module does not include internal channel-level fuses, so external fusing matched to the specific load current rating must be added to protect field wiring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does utilizing a Removable Terminal Block (RTB) simplify maintenance downtime?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe RTB allows all field wiring to remain permanently terminated to blocks like the 1756-TBCH, enabling instant module replacement without unbolting individual wires.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat factors should engineers consider regarding module current derating at high temperatures?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTotal module current must be linearly derated from 5 Amps at 30°C down to 4 Amps at 60°C to prevent excessive internal thermal accumulation in tightly packed chassis enclosures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow should I select between different compatible terminal block options for this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eVerify whether your cabinet wiring standard requires cage-clamp or screw-clamp connections provided by variants like the 1756-TBNH or 1756-TBSH.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013809725622,"sku":"1756-OA8","price":155.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1756-OA8.jpg?v=1787734303","url":"https:\/\/www.plcsparehub.com\/products\/1756-oa8-allen-bradley-controllogix-ac-output-module-order-now","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}