{"product_id":"allen-bradley-1756-if8-a-analog-input-module","title":"Allen-Bradley 1756-IF8\/A Analog Input Module","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1756-IF8\/A Analog Input Module\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eConfigured for acquisition of voltage and current signals within ControlLogix I\/O chassis systems, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-IF8\/A\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-IF8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eanalog input module, provides direct electrical conversion of 8-channel analog inputs including differential, single-ended, and 2-wire transmitter signals for backplane-based data processing.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eNo structured suffix segmentation is defined beyond base catalog identifier 1756-IF8\/A.\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-IF8\/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\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\u003e0.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e2.0 in x 6.0 in x 5.0 in\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\u003e~120 mA at 5.1 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e8 analog channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Types\u003c\/td\u003e\n\u003ctd\u003eVoltage: ±10 V, 0–10 V, 0–5 V, 1–5 V; Current: 0–20 mA, 4–20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e15 bits plus 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\u003c\/td\u003e\n\u003ctd\u003eVoltage \u0026gt;1 MΩ, Current 250 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUpdate Rate\u003c\/td\u003e\n\u003ctd\u003eConfigurable (high-speed mode limited to 4 channels)\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 \/ 1492 IFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eControlLogix Backplane Acquisition and Channel Scaling Behavior\u003c\/h3\u003e\n\u003cp\u003eThe module interfaces with the ControlLogix backplane through deterministic scheduled data exchange cycles. Analog-to-digital conversion is executed per channel with configurable scan segmentation, where high-speed mode restricts active channel count to maintain conversion throughput. Channel scaling is performed internally using fixed resolution ADC mapping (15-bit signed representation), with backplane current draw defining slot-level power budgeting constraints in the chassis.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Can all 8 channels operate simultaneously in high-speed mode?\u003cbr\u003eA: No. In high-speed mode, only 4 channels are active due to conversion timing constraints.\u003c\/p\u003e\n\u003cp\u003eQ: Does the module support hot-swap removal during operation?\u003cbr\u003eA: Removal is supported only under chassis-approved conditions; backplane power must be managed to avoid bus interruption during insertion or extraction.\u003c\/p\u003e\n\u003cp\u003eQ: Can voltage and current inputs be mixed on different channels?\u003cbr\u003eA: Yes. Each channel is individually configurable for voltage or current input types.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eThe module shall be installed in a ControlLogix chassis with system power removed prior to insertion of the RTB or IFM interface. Shielded analog wiring is required for both voltage and current loops, with shield termination performed at a single grounding point within the control cabinet. Channel configuration must be completed before energizing the backplane to ensure correct scaling and input mode initialization. Wiring separation between analog signals and high-frequency switching conductors must be maintained to reduce induced noise coupling.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43602245058650,"sku":"1756-IF8\/A","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756SC-IF8H.jpg?v=1778556031","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-if8-a-analog-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}