{"product_id":"allen-bradley-1746-fio4i-slc-500-fast-analog-i-o-module","title":"Allen-Bradley 1746-FIO4I SLC 500 Fast Analog I\/O Module","description":"\u003ch1\u003eAllen-Bradley 1746-FIO4I SLC 500 Fast Analog I\/O Module\u003c\/h1\u003e\n\u003cp\u003eConfigured for high-speed analog signal acquisition and current loop output execution in SLC 500 backplane systems, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-FIO4I\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1746-FIO4I fast analog I\/O module\u003c\/strong\u003e) provides direct physical\/electrical execution for dual differential analog input sampling and dual 0-20 mA current output generation across SLC 500 fixed and modular chassis platforms.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe 1746-FIO4I is a single-slot fast analog combination module within the SLC 500 I\/O family. No functional segmentation exists beyond the base catalog identifier. Input\/output channel architecture is fixed at 2 inputs and 2 outputs with defined conversion and resolution parameters.\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-FIO4I\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\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.79 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eSingle slot chassis module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e5 VDC: 55 mA; 24 VDC: 150 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eFast Analog Combination I\/O Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs\u003c\/td\u003e\n\u003ctd\u003e2 differential (0-10 VDC \/ 0-20 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003e2 (0-20 mA current loop)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Resolution\u003c\/td\u003e\n\u003ctd\u003e12 bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Resolution\u003c\/td\u003e\n\u003ctd\u003e14 bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Method\u003c\/td\u003e\n\u003ctd\u003eSuccessive approximation (ADC)\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\u003eConversion Time\u003c\/td\u003e\n\u003ctd\u003e7.5 microseconds per sample window\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth\u003c\/td\u003e\n\u003ctd\u003e7 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep Response\u003c\/td\u003e\n\u003ctd\u003e100 ms input; 2.5 ms output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Interface\u003c\/td\u003e\n\u003ctd\u003eSLC 500 parallel backplane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlot Requirement\u003c\/td\u003e\n\u003ctd\u003e1 slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSLC 500 Backplane Timing and Conversion Pipeline Control\u003c\/h3\u003e\n\u003cp\u003eThe module executes analog-to-digital conversion using successive approximation sampling synchronized with SLC 500 backplane scan cycles. Input channels operate in differential mode with 12-bit quantization, while output channels use a 14-bit R-2R ladder DAC structure for current loop generation.\u003c\/p\u003e\n\u003cp\u003eThe 512 microsecond update cycle defines deterministic refresh behavior independent of CPU scan variability. Backplane current draw is split across 5 V logic rail and 24 V analog interface rail, requiring chassis-level power budget allocation when mixed I\/O density is present. Signal sampling latency is constrained by 7.5 microsecond conversion windows with track-and-hold stabilization of 1.5 microseconds prior to digitization.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Can input channels operate simultaneously on voltage and current signals?\u003cbr\u003eA: Yes. Each differential input channel supports configurable 0-10 VDC or 0-20 mA signal acquisition, but not mixed-mode per single channel instance.\u003c\/p\u003e\n\u003cp\u003eQ: Does the module support hot-swapping during backplane operation?\u003cbr\u003eA: No. Removal or insertion under energized backplane conditions may corrupt scan synchronization and ADC timing alignment.\u003c\/p\u003e\n\u003cp\u003eQ: What defines the output update behavior on 0-20 mA channels?\u003cbr\u003eA: Output refresh is governed by the 512 microsecond module update cycle with 14-bit DAC resolution mapping via R-2R ladder conversion.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eSystem power must be removed before installation to prevent backplane connector damage and analog reference drift. The module must be inserted into a single SLC 500 chassis slot with full edge connector seating. Ensure correct polarity alignment of the backplane bus fingers prior to latch engagement.\u003c\/p\u003e\n\u003cp\u003eAnalog input wiring should use shielded twisted pair conductors with shield termination at a single cabinet ground point. Current loop outputs (0-20 mA) must maintain loop continuity with appropriate load resistance to ensure stable DAC regulation. Signal cables should be routed away from high-frequency switching conductors to minimize inductive coupling into differential input stages.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43498782130266,"sku":"1746-FIO4I","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1746-FIO4I2.jpg?v=1781519096","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1746-fio4i-slc-500-fast-analog-i-o-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}