{"product_id":"allen-bradley-1756-im16i-a-controllogix-ac-digital-input-module","title":"Allen-Bradley 1756-IM16I\/A ControlLogix AC Digital Input Module","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1756-IM16I\/A ControlLogix AC Digital 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-IM16I\/A\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-IM16I\/A\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eisolated digital input module, serves as a ControlLogix backplane I\/O interface device for processing 159–265 VAC discrete AC state signals across 16 independently isolated input channels within ControlLogix chassis systems. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-IM16I\/A (1756-IM16I\/A AC digital input module)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eperforms direct AC signal threshold detection and converts field-level voltage states into backplane-accessible digital input data.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e1756\u003c\/strong\u003e: ControlLogix chassis-based I\/O platform\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIM16\u003c\/strong\u003e: 16-channel AC digital input structure\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eI\u003c\/strong\u003e: Individually isolated input architecture\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\/A\u003c\/strong\u003e: Hardware revision identifier\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNo further functional segmentation is defined in the provided configuration data.\u003c\/p\u003e\n\u003chr\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-IM16I\/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\u003e0.63 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eIsolated digital input module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e16 individually isolated AC inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e240 VAC nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e159–265 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Delay Time\u003c\/td\u003e\n\u003ctd\u003eProgrammable 9 ms or 18 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Operating Current\u003c\/td\u003e\n\u003ctd\u003e5 mA at 159 VAC, 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Operating Current\u003c\/td\u003e\n\u003ctd\u003e13 mA at 265 VAC, 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Off-State Current\u003c\/td\u003e\n\u003ctd\u003e2.5 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Interface\u003c\/td\u003e\n\u003ctd\u003eControlLogix 1756 chassis bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003e36-pin RTB or 1492 IFM interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eUL, CE, CSA, hazardous location approvals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eControlLogix Backplane Bus Deterministic I\/O Behavior\u003c\/h3\u003e\n\u003cp\u003eThe 1756-IM16I\/A operates within the ControlLogix backplane communication structure, where input state transitions are synchronized to scheduled I\/O scan cycles managed by the controller task execution system. The module maps AC threshold detection events into digital status bits prior to backplane transfer, ensuring consistent state representation across the chassis I\/O data table.\u003c\/p\u003e\n\u003cp\u003eBackplane throughput behavior is governed by chassis slot configuration and controller task rate. The module does not perform field protocol conversion; all AC signal interpretation is completed at the input stage prior to deterministic data publishing.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Can the input delay time be adjusted per channel?\u003cbr\u003eA: The module supports programmable input filtering with selectable 9 ms or 18 ms delay settings. Configuration is applied at module level and affects all channels uniformly.\u003c\/p\u003e\n\u003cp\u003eQ: What happens if input current falls below 5 mA threshold?\u003cbr\u003eA: Signals below the minimum operating current threshold may not be reliably registered as ON-state transitions, resulting in undefined input recognition behavior.\u003c\/p\u003e\n\u003cp\u003eQ: Is channel-to-channel electrical interaction possible?\u003cbr\u003eA: No. Each channel is individually isolated, preventing electrical coupling or shared reference interaction between adjacent input circuits.\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\u003eInstall module into a compatible 1756 ControlLogix chassis slot with system power removed or per approved insertion procedure\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFully seat 36-pin RTB or IFM connector prior to energizing field wiring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaintain separation between AC input conductors and low-level signal or communication wiring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEnsure field AC supply remains within 159–265 VAC operating window before commissioning\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eApply proper shielding termination practices for long cable runs to reduce induced noise\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVerify channel configuration and input filtering parameters prior to system startup\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43602448253018,"sku":"1756-IM16I\/A","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-IM16IA2.jpg?v=1783319171","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-im16i-a-controllogix-ac-digital-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}