{"product_id":"allen-bradley-1746-ni16i-a-analog-input-module","title":"Allen-Bradley 1746-NI16I\/A Analog Input Module","description":"\u003ch1\u003eAllen-Bradley 1746-NI16I\/A Analog Input Module\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-NI16I\/A\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1746-NI16I\/A\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eanalog input module, serves as the primary 1746-NI16I\/A current input module utilized to execute 0–20 mA and 4–20 mA signal acquisition across SLC 500 backplane scan-based I\/O architectures. The module digitizes 16-channel current loop signals using sigma-delta conversion with programmable filtering into 16-bit resolution process data.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eNo suffix segmentation is defined for 1746-NI16I\/A. The designation represents a fixed 16-channel current input configuration within the SLC 500 NI16 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\u003e1746-NI16I\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003eAllen-Bradley\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.75 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-25 deg C to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to 85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e5 V DC 125 mA; 24 V DC 75 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e16 current inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Range\u003c\/td\u003e\n\u003ctd\u003e0–20 mA, 4–20 mA, ±20 mA, 0–1 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\u003eConversion Method\u003c\/td\u003e\n\u003ctd\u003eSigma-Delta\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Filtering\u003c\/td\u003e\n\u003ctd\u003e6–250 Hz programmable digital low-pass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep Response\u003c\/td\u003e\n\u003ctd\u003e9–630 ms (filter dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e500 V AC (1 s)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e2.43 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicators\u003c\/td\u003e\n\u003ctd\u003e5 green LED status indicators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Cable\u003c\/td\u003e\n\u003ctd\u003eBelden 8761 or equivalent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSLC 500 Backplane Current Signal Acquisition Architecture\u003c\/h3\u003e\n\u003cp\u003eThe 1746-NI16I\/A performs multiplexed current loop sampling across 16 input channels using sigma-delta conversion stages with programmable digital filtering. Each channel is time-sliced into the internal acquisition pipeline, where filtering parameters define the effective bandwidth between 6 Hz and 250 Hz, directly influencing step response behavior.\u003c\/p\u003e\n\u003cp\u003eConverted values are transferred into SLC 500 input image tables via deterministic backplane scan cycles. The module maintains separation between acquisition and processing domains, allowing stable representation of low-level current signals under variable electrical noise conditions. Channel grouping is internally segmented into 4-channel blocks with shared status indicators for diagnostic visibility.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1746-NI16I\/A be hot-swapped in a powered SLC 500 rack?\u003cbr\u003eA: No. Module insertion and removal require chassis power shutdown due to backplane electrical coupling design.\u003c\/p\u003e\n\u003cp\u003eQ: How does filtering affect module response time?\u003cbr\u003eA: Step response varies between 9 ms and 630 ms depending on selected digital low-pass filter bandwidth (6–250 Hz), directly affecting signal update latency.\u003c\/p\u003e\n\u003cp\u003eQ: What is the backplane power load of this module?\u003cbr\u003eA: The module consumes 125 mA at 5 V DC and 75 mA at 24 V DC, which must be included in SLC 500 rack power calculations.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the module in a compatible SLC 500 chassis slot with verified backplane capacity. Use shielded twisted-pair cable such as Belden 8761 for all current loop inputs. Maintain separation between analog signal wiring and high-voltage conductors to minimize electromagnetic coupling. Terminate cable shields at a single-point ground on the panel side only. Ensure terminal block seating integrity before energizing the system. Verify loop compliance within specified current ranges (0–20 mA, 4–20 mA, ±20 mA) to prevent saturation of the sigma-delta conversion stage.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43505280090202,"sku":"1746-NI16I\/A","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1746-NI16IA2.jpg?v=1781605060","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1746-ni16i-a-analog-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}