{"product_id":"allen-bradley-1746-no8i-slc-500-analog-output-module","title":"Allen-Bradley 1746-NO8I SLC 500 Analog Output Module","description":"\u003ch1\u003eAllen-Bradley 1746-NO8I SLC 500 Analog Output Module\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-NO8I\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1746-NO8I Analog Output Module\u003c\/strong\u003e, operates as a dedicated hardware component for 0-20 mA signal generation within SLC 500 backplane-based control architectures. Configured for multi-channel analog current synthesis, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-NO8I\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides direct electrical output control across 8 channels with 16-bit conversion resolution through SLC 500 rack integration.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe 1746-NO8I designation follows SLC 500 module structuring:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e1746: SLC 500 I\/O platform identifier\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNO8: 8-channel analog output configuration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eI: Current output variant (0-20 mA class)\u003cbr\u003eNo further functional segmentation or option coding is defined.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"last:pe-10\"\u003eParameter\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1746-NO8I\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.55 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e5 V backplane 120 mA \/ 24 V 170 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e8 current outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Range\u003c\/td\u003e\n\u003ctd\u003e0-20 mA (configurable variants up to 21.5 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e16-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUpdate Time\u003c\/td\u003e\n\u003ctd\u003e~2 ms per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e50 V continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e~6.5 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eBackplane Bus Timing and Analog Output Refresh Behavior\u003c\/h3\u003e\n\u003cp\u003eWithin the SLC 500 architecture, the 1746-NO8I executes analog signal updates via cyclic backplane scan execution. Each channel output is refreshed at approximately 2 ms intervals, with deterministic synchronization to SLC processor scan cycles. Backplane current loading (5 V and 24 V domains) defines module density limits within the rack, while DAC conversion maintains 16-bit resolution mapping for current loop generation.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1746-NO8I support hot insertion into an energized SLC rack?\u003cbr\u003eA: No. The module is not designed for live insertion. Power must be removed from the rack before installation or removal to avoid backplane damage.\u003c\/p\u003e\n\u003cp\u003eQ: Are all 8 analog outputs electrically isolated per channel?\u003cbr\u003eA: No. The outputs share a common reference structure with limited system-level isolation (50 V continuous), not per-channel isolation.\u003c\/p\u003e\n\u003cp\u003eQ: What happens when backplane current limits are exceeded?\u003cbr\u003eA: Exceeding 5 V or 24 V backplane current limits can cause module initialization failure or unstable DAC output behavior during scan cycles.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInsert the module into the SLC 500 rack until fully seated in the backplane connector to ensure stable signal and power distribution. Maintain correct wire gauge selection (22–14 AWG) for analog current loop integrity. Keep analog wiring separated from high-voltage switching conductors to reduce induced noise into 0-20 mA loops. Shield grounding shall be implemented at a single reference point to avoid loop current distortion. Ensure rack power is removed before insertion or extraction to prevent backplane transients.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43497745875034,"sku":"1746-NO8I","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1746-NO8I2.jpg?v=1781508350","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1746-no8i-slc-500-analog-output-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}