{"product_id":"allen-bradley-1756-if16-a-controllogix-analog-input-module","title":"Allen-Bradley 1756-IF16\/A ControlLogix Analog Input Module","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1756-IF16\/A ControlLogix Analog Input Module\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eConfigured for multi-range analog signal acquisition in ControlLogix backplane architectures, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-IF16\/A\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1756-IF16\/A\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAnalog Input Module) provides direct electrical conversion of voltage and current field signals into controller-accessible digital values across 16 configurable input channels within Rockwell ControlLogix systems. Input sampling is synchronized through chassis slot-based deterministic backplane scheduling.\u003c\/p\u003e\n\u003cp\u003eThe module processes mixed analog input types including voltage, current, and transmitter interfaces, supporting selectable channel grouping for differential or single-ended acquisition modes.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe 1756-IF16\/A is a single defined ControlLogix catalog configuration. No additional suffix segmentation or functional option matrix is defined in the provided dataset. No structural decomposition is applied.\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\u003e1756-IF16\/A\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\u003e2.33 W total backplane power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eAnalog Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e16 channels (single-ended \/ differential configurable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Configuration\u003c\/td\u003e\n\u003ctd\u003e16 single-ended, 8 differential, or 4 differential (high speed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Types\u003c\/td\u003e\n\u003ctd\u003eVoltage, current, 2-wire transmitter inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Ranges\u003c\/td\u003e\n\u003ctd\u003e±10 V, 0–10 V, 0–5 V, 1–5 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Range\u003c\/td\u003e\n\u003ctd\u003e0–20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e15 bits + sign\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.1% full scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance (Voltage)\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;10 MΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance (Current)\u003c\/td\u003e\n\u003ctd\u003e249 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5.1 VDC)\u003c\/td\u003e\n\u003ctd\u003e120 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (24 VDC)\u003c\/td\u003e\n\u003ctd\u003e65 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003eVoltage: 7.84 BTU\/hr; Current: 13.3 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Power Dissipation\u003c\/td\u003e\n\u003ctd\u003eVoltage: 2.3 W; Current: 3.9 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eChannel-to-backplane isolation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Options\u003c\/td\u003e\n\u003ctd\u003e36-pin RTB or 1492 IFM interface module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eControlLogix Backplane Communication and I\/O Scaling Behavior\u003c\/h3\u003e\n\u003cp\u003eThe module communicates through ControlLogix backplane cyclic scheduling, where analog conversion results are transferred via slot-based deterministic arbitration. Each channel group is sampled according to configured update rate, with high-speed mode limiting simultaneous active channels to reduce scan latency.\u003c\/p\u003e\n\u003cp\u003eI\/O scaling is implemented through channel multiplexing logic within the module firmware, allowing trade-off between channel count and update frequency. Backplane data transfer is synchronized with controller task execution cycles rather than external field timing.\u003c\/p\u003e\n\u003cp\u003eFirmware compatibility is validated during chassis initialization, where module identity and configuration are registered through backplane enumeration. Isolation architecture provides channel-to-backplane separation to reduce common-mode interference during analog conversion.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: How does high-speed mode affect channel usage?\u003cbr\u003eA: In high-speed configuration, only 4 differential channels can operate simultaneously due to internal sampling and multiplexing limitations.\u003c\/p\u003e\n\u003cp\u003eQ: What is the backplane power consumption under normal operation?\u003cbr\u003eA: The module draws approximately 120 mA at 5.1 VDC and 65 mA at 24 VDC, with a total backplane power of 2.33 W.\u003c\/p\u003e\n\u003cp\u003eQ: Does channel-to-backplane isolation affect measurement accuracy?\u003cbr\u003eA: Channel-to-backplane isolation reduces common-mode coupling into the ControlLogix backplane, maintaining analog conversion accuracy within specified tolerances.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the module into a compatible ControlLogix chassis with verified backplane power capacity. Ensure correct seating of 36-pin RTB or IFM terminal assemblies to maintain stable analog signal paths across all 16 channels.\u003c\/p\u003e\n\u003cp\u003eMaintain separation between analog signal wiring and high-frequency switching conductors to reduce electromagnetic coupling into voltage measurement circuits. Use single-point grounding for shield termination to avoid ground loop currents.\u003c\/p\u003e\n\u003cp\u003eVerify channel configuration, signal type selection, and update rate settings in ControlLogix programming environment prior to commissioning. Avoid mixing current loop and high-impedance voltage wiring on shared reference conductors.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43601380212826,"sku":"1756-IF16\/A","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-IF16A2.jpg?v=1783308251","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-if16-a-controllogix-analog-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}