{"product_id":"allen-bradley-1746-nio4i-slc-500-analog-combination-module","title":"Allen-Bradley 1746-NIO4I SLC 500 Analog Combination Module","description":"\u003ch1\u003eAllen-Bradley 1746-NIO4I SLC 500 Analog Combination Module\u003c\/h1\u003e\n\u003cp\u003eConfigured for mixed analog signal acquisition and analog output execution in SLC 500 I\/O architectures, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-NIO4I\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1746-NIO4I\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAnalog Combination Module) provides direct physical\/electrical interface between field current\/voltage signals and PLC backplane processing channels.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe 1746-NIO4I designation does not contain structured functional suffix segmentation. The model is identified as a single cataloged SLC 500 analog combination module without optional ordering suffix branches.\u003c\/p\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-NIO4I\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\u003e0.45 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eSingle-slot SLC 500 rack module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e55 mA @ 5 VDC \/ 90 mA @ 24 VDC backplane draw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e2 analog inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e2 analog current outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal Range\u003c\/td\u003e\n\u003ctd\u003e-20 mA to +20 mA, -10 VDC to +10 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Range\u003c\/td\u003e\n\u003ctd\u003e0-20 mA, -10 VDC to +10 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e16 bit input \/ 14 bit output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUpdate Time\u003c\/td\u003e\n\u003ctd\u003e512 microseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep Response\u003c\/td\u003e\n\u003ctd\u003e60 ms in \/ 2.5 ms out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e500 VAC tested\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth\u003c\/td\u003e\n\u003ctd\u003e10 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Style\u003c\/td\u003e\n\u003ctd\u003eRack mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Interface\u003c\/td\u003e\n\u003ctd\u003eSLC 500 backplane bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eBackplane Signal Processing Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe module interfaces with the SLC 500 backplane using cyclic I\/O scanning and end-of-scan update execution. Input conversion is performed via sigma-delta sampling with programmable filtering applied prior to backplane transfer. Backplane loading is defined by fixed current draw characteristics and deterministic scan timing, with no field-side hot-swap support.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1746-NIO4I be hot-swapped under energized rack conditions?\u003cbr\u003eA: The module does not support field-side hot-swap operation. Removal or insertion requires rack power isolation to avoid backplane disturbance.\u003c\/p\u003e\n\u003cp\u003eQ: How is backplane current distributed during module operation?\u003cbr\u003eA: Current consumption is split between 5 VDC logic rail (55 mA) and 24 VDC backplane rail (90 mA), fixed during scan operation.\u003c\/p\u003e\n\u003cp\u003eQ: Does firmware affect I\/O update timing or conversion cycle?\u003cbr\u003eA: Conversion timing (512 microseconds update time) is hardware-defined and not modified by firmware revision level.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eInsert module into an SLC 500 compatible rack slot with backplane alignment confirmed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEnsure rack power is disabled before installation or removal to prevent backplane signal disturbance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUse shielded twisted pair wiring for analog inputs and route away from high-voltage conductors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTerminate cable shields at a single-point ground reference at the chassis end only.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaintain separation between input and output wiring paths to reduce coupling on differential channels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVerify terminal block seating prior to energizing system backplane.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43505305223258,"sku":"1746-NIO41","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1746-NIO412.jpg?v=1781606221","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1746-nio4i-slc-500-analog-combination-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}