{"product_id":"1794-ia8-flex-i-o-8-point-ac-digital-input-module-allen-bradley","title":"1794-IA8 Flex I\/O 8-Point AC Digital Input Module | Allen Bradley","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen Bradley 1794-IA8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as a high-density discrete input interface for the Flex I\/O platform. It translates 120V AC signals from field devices—such as limit switches, push buttons, and proximity sensors—into logic-level data for the controller. This unit arrives\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand factory-sealed, ensuring immediate compatibility with your existing distributed I\/O architecture.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe 1794-IA8 module utilizes a compact design to handle standard 120V AC industrial signaling.\u003c\/p\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\u003eManufacturer\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAllen Bradley (Rockwell Automation)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8 Non-Isolated Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOn-State Voltage Range\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e65V AC (min) to 132V AC (max)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNominal Input Current\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e12 mA @ 120V AC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOff-State Voltage (max)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e43V AC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eFlexbus Current\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e30mA @ 5V DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePower Dissipation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4.5W @ 132V AC (max)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Frequency\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e47–63 Hz\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.25 lbs (0.11 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModular Space Efficiency:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1794-IA8 plugs directly into a terminal base, eliminating the need for internal rack wiring. This modularity reduces cabinet footprint and simplifies the transition from local to distributed I\/O.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAggressive Signal Filtering:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module incorporates hardware filtering to reject electrical noise common in AC power lines. It accurately distinguishes between true \"On\" states and transient voltage spikes, preventing false triggers in noisy industrial environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSimplified Troubleshooting:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIndividual status indicators on the front panel provide real-time visual confirmation of input activity. This allows maintenance teams to verify field-side wiring health without opening a laptop or accessing the PLC code.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHot-Swap Capability:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWithin a powered Flex I\/O system, the 1794-IA8 supports Removal and Insertion Under Power (RIUP). This feature enables technicians to replace modules without halting the entire process line, significantly reducing unplanned downtime.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan I mix AC and DC modules on the same Flex I\/O terminal base?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe terminal base determines the wiring configuration, but the Flexbus allows different module types. However, you must ensure the terminal base (e.g., 1794-TB3) supports the voltage levels and wiring requirements of the 1794-IA8 AC input module specifically.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 1794-IA8 provide isolation between individual channels?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The 1794-IA8 features 8 non-isolated inputs. This means the inputs share a common return path. If your application requires independent returns for each circuit to prevent ground loops or cross-talk, consider the isolated versions within the 1794 series.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the significance of the 43V AC off-state maximum?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis threshold ensures that leakage current from long cable runs or solid-state sensors does not cause the PLC to perceive a \"false on\" signal. The module ignores any voltage below 43V AC, providing a robust buffer against induced voltage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat terminal bases are compatible with this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1794-IA8 typically seats into 1794-TB2, 1794-TB3, or 1794-TB3S terminal bases. Always verify that your base selection matches your field wiring termination style (screw or spring clamp).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52787843825973,"sku":"1794-IA8","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/1794-IA8.png?v=1777256855","url":"https:\/\/www.5gplc.com\/products\/1794-ia8-flex-i-o-8-point-ac-digital-input-module-allen-bradley","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}