{"product_id":"1746-no8i-allen-bradley-slc-500-analog-current-output-module","title":"1746-NO8I | Allen-Bradley | SLC 500 Analog Current Output Module","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-NO8I\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as a high-density analog output interface for the SLC 500 controller platform. This module provides eight high-precision current output channels, allowing the PLC to drive multiple field devices such as actuators, valves, and motor speed controllers simultaneously. We supply this unit in\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New, original factory condition\u003c\/strong\u003e, ensuring your legacy SLC systems maintain maximum uptime with hardware that meets the latest manufacturer revisions.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\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\u003eNumber of Outputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8 Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Current Range\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4-20 mA; 0-20 mA; 0-21 mA; 0-21.5 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\u003e16 bits\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eStep Response\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 ms (0 to 95% of full scale)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eUpdate Time\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eClass 1: 5 ms; Class 3: 10 ms\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\u003e120 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\u003e250 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eThermal Dissipation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e6.6 Watts\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWire Size\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo 14 to 24 AWG per terminal\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 60 °C (32 to 140 °F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eEngineering Advantages\u003c\/h2\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Density Control:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1746-NO8I consolidates eight analog channels into a single SLC slot. This reduces the number of required chassis slots compared to lower-density modules, freeing up space for additional I\/O or specialized communication cards.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUltra-Fast Signal Response:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1 ms step response ensures nearly instantaneous control over field actuators. This speed proves critical in closed-loop PID applications where system stability depends on rapid corrections to process variables.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFlexible Data Formatting:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module supports multiple data formats including Scaled Engineering Units, PID scaling, and user-defined scales. This flexibility eliminates complex math blocks within the ladder logic, simplifying code development and troubleshooting.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBroad Output Range Support:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIt handles diverse current ranges up to 21.5 mA. This extended range allows for \"over-range\" signaling, which engineers frequently use to detect valve sticking or saturation points in process instrumentation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRobust Terminal Termination:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module accepts two 14 to 24 AWG wires per terminal. This allows for easy \"daisy-chaining\" of common signals directly at the module face, reducing the need for external distribution terminal blocks inside the cabinet.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this unit replace the older 1746-NO4I module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. While the 1746-NO8I provides double the density, it uses the same SLC 500 backplane interface. You must update your I\/O configuration in RSLogix 500 to account for the increased channel count and different data word requirements.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the significance of \"Class 1\" and \"Class 3\" update times?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe update time depends on the processor and chassis configuration. Class 1 operation provides a faster 5 ms update rate, ideal for high-speed motion or pressure control, while Class 3 provides a 10 ms rate suitable for standard temperature or level control.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the module require an external power supply?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1746-NO8I draws its operating power (120 mA @ 5V and 250 mA @ 24V) directly from the SLC 500 chassis backplane. Ensure your power supply (e.g., 1746-P1, P2, or P4) has sufficient headroom to support these requirements.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this product a refurbished or used unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAbsolutely not. We guarantee this 1746-NO8I is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e. It ships in the original Allen-Bradley factory packaging with intact security seals and full technical documentation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53130404462776,"sku":"1746-NO8I","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1746-NO8I.jpg?v=1774605957","url":"https:\/\/www.globalpetroparts.com\/products\/1746-no8i-allen-bradley-slc-500-analog-current-output-module","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}