{"product_id":"allen-bradley-1746sc-ini4vi-isolated-analog-input-module","title":"Allen-Bradley 1746SC-INI4VI Isolated Analog Input Module","description":"\u003ch1\u003eAllen-Bradley 1746SC-INI4VI Isolated Analog Input Module\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746SC-INI4VI\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1746SC-INI4VI\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eisolated analog input module, serves as the primary signal acquisition interface utilized to execute multi-channel analog voltage and current measurement across SLC 500 platforms. It provides four electrically isolated input channels supporting sigma-delta based analog-to-digital conversion within the SLC 500 I\/O architecture.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eNo structured suffix segmentation is defined for the 1746SC-INI4VI part number. The identifier corresponds directly to the module type and channel configuration within the SLC 500 compatible analog input family.\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\u003e1746SC-INI4VI\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\u003e0.50 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eBackplane power consumption 2.75 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e4 isolated analog input channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Method\u003c\/td\u003e\n\u003ctd\u003eSigma-Delta A\/D conversion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Ranges\u003c\/td\u003e\n\u003ctd\u003e0-10 VDC, +\/-10 VDC, 0-5 VDC, 1-5 VDC, 0-20 mA, 4-20 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\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e570 mA @ 5 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e3.25 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNormal Mode Rejection\u003c\/td\u003e\n\u003ctd\u003e98 dB @ 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration\u003c\/td\u003e\n\u003ctd\u003eAuto calibration every 10 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Filtering\u003c\/td\u003e\n\u003ctd\u003eProgrammable notch filters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eAllen-Bradley SLC 500 Backplane Acquisition Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe module interfaces with the SLC 500 backplane using cyclic data exchange. Channel isolation is implemented at the input stage, separating field wiring from backplane logic domain. Sigma-delta conversion introduces oversampling behavior for low-frequency signal stabilization. Backplane loading is determined by continuous 570 mA consumption profile, affecting slot-level power budgeting across multi-module chassis configurations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1746SC-INI4VI support hot insertion in an energized SLC 500 chassis?\u003cbr\u003eA: The module is designed for chassis slot integration, but insertion under energized backplane conditions requires adherence to SLC 500 system power-down procedure to avoid bus disturbance.\u003c\/p\u003e\n\u003cp\u003eQ: How is channel isolation implemented across the four inputs?\u003cbr\u003eA: Each channel is electrically isolated from the backplane and adjacent channels through internal isolation barriers, reducing cross-channel coupling on mixed signal ranges.\u003c\/p\u003e\n\u003cp\u003eQ: What is the impact of backplane current consumption on multi-slot configurations?\u003cbr\u003eA: The module draws 570 mA from the 5 V backplane rail, which must be included in total chassis power budgeting to prevent backplane voltage sag under full slot loading.\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 designated 1746 I\/O slot with chassis power removed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVerify backplane connector alignment prior to full seating force application.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaintain separation of analog field wiring from high-noise conductors to reduce coupling into sigma-delta conversion front end.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUse shielded twisted pair for voltage and current input channels where applicable.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEnsure shield termination at single-point ground to prevent ground loop formation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43537530847322,"sku":"1746SC-INI4VI","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1746SC-INI4VI2.jpg?v=1782201786","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1746sc-ini4vi-isolated-analog-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}