{"product_id":"allen-bradley-1756-if16ih-controllogix-hart-analog-input-module","title":"Allen-Bradley 1756-IF16IH ControlLogix HART Analog Input Module","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1756-IF16IH ControlLogix HART Analog Input Module\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-IF16IH\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-IF16IH\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eHART analog input module, operates as a dedicated hardware component for acquisition of 0-20 mA and 4-20 mA process signals with per-channel HART modulation within ControlLogix backplane architectures. The module executes 16-channel isolated analog conversion with independent HART modem coupling on each input path.\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-IF16IH\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\u003e0.63 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0-60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e5.30 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e16 isolated analog channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Types\u003c\/td\u003e\n\u003ctd\u003e0-20 mA, 4-20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e16–21 bits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance\u003c\/td\u003e\n\u003ctd\u003e250 ohms (+\/- 5 ohms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e225 mA at 5.1 VDC; 200 mA at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInrush Current\u003c\/td\u003e\n\u003ctd\u003e400 mA at 5.1 VDC; 450 mA at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e250 V continuous (galvanic isolation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOvervoltage Protection\u003c\/td\u003e\n\u003ctd\u003e28.8 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlot Width\u003c\/td\u003e\n\u003ctd\u003e1 slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure\u003c\/td\u003e\n\u003ctd\u003eOpen style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eControlLogix Backplane Execution and HART Channel Architecture\u003c\/h3\u003e\n\u003cp\u003eThe module implements per-channel HART modem integration, where each analog input channel maintains independent digital overlay communication over the same 4-20 mA loop. The ControlLogix backplane schedules analog sampling and HART transaction cycles as separate execution domains, allowing simultaneous signal conversion and field device diagnostics.\u003c\/p\u003e\n\u003cp\u003eGalvanic isolation is implemented across channel-to-channel, channel-to-backplane, and channel-to-frame ground domains at a continuous 250 V AC rms level. This structure prevents loop interference between HART communication carriers and analog measurement circuits under shared chassis conditions.\u003c\/p\u003e\n\u003cp\u003eInput impedance is fixed at 250 ohms (+\/- 5 ohms), defining loop current-to-voltage conversion behavior for transmitter interface compatibility.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Can each input channel execute HART communication independently?\u003cbr\u003eA: Yes. Each of the 16 channels includes a dedicated HART modem, allowing parallel field device communication without shared multiplexing.\u003c\/p\u003e\n\u003cp\u003eQ: What is the effect of backplane current draw during full channel operation?\u003cbr\u003eA: Backplane loading remains at 225 mA at 5.1 VDC under nominal operation; inrush current peaks occur only during module energization.\u003c\/p\u003e\n\u003cp\u003eQ: Does the module support channel-to-channel electrical isolation?\u003cbr\u003eA: Yes. Channel-to-channel, channel-to-backplane, and channel-to-frame isolation are implemented with 250 V AC rms continuous rating.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInsert the module into a compatible ControlLogix chassis slot with system power removed. Ensure proper seating of the terminal assembly prior to energization.\u003c\/p\u003e\n\u003cp\u003eMaintain separation between HART\/analog loop wiring and backplane power conductors to reduce capacitive coupling into high-resolution conversion stages. Shield termination should be implemented at a single-point ground reference within the control cabinet to avoid loop-induced offset errors in 4-20 mA circuits.\u003c\/p\u003e\n\u003cp\u003eTerminal impedance (250 ohm network path) must remain stable across all channels to preserve HART carrier modulation integrity.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43601572659290,"sku":"1756-IF16IH","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-IF16IH2.jpg?v=1783309475","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-if16ih-controllogix-hart-analog-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}