{"product_id":"allen-bradley-1756-ib32k-controllogix-digital-dc-input-module","title":"Allen-Bradley 1756-IB32K ControlLogix Digital DC Input Module","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1756-IB32K ControlLogix Digital DC Input Module\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eConfigured for 12–24 VDC sinking discrete signal acquisition in ControlLogix backplane architectures, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-IB32K\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1756-IB32K\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDigital DC Input Module) serves as the primary 32-point digital input module utilized to execute high-density field signal acquisition across ControlLogix PLC platforms. Input states are converted into backplane-transferred discrete status words with module health and communication status monitoring.\u003c\/p\u003e\n\u003cp\u003eThe module samples 32 DC input channels with 420 microseconds base delay plus selectable filtering, synchronizing input updates with chassis slot-based deterministic scan cycles.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe 1756-IB32K is a single catalog-defined ControlLogix configuration. No additional suffix segmentation or functional option coding structure 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-IB32K\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\u003e1.00 lbs \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e6.2 W max at 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDigital DC Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e32 channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e12–24 VDC sink\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10–31.2 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Delay Time\u003c\/td\u003e\n\u003ctd\u003e420 microseconds + selectable filter time\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Operating Current\u003c\/td\u003e\n\u003ctd\u003e2 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Operating Current\u003c\/td\u003e\n\u003ctd\u003e5.5 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-state Input Current\u003c\/td\u003e\n\u003ctd\u003e1.5 mA max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5 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\u003e2 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Blocks\u003c\/td\u003e\n\u003ctd\u003e1756-TBCH, 1756-TBS6H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eGrouped isolation (ControlLogix architecture)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eConformal coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e887172383625\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eControlLogix Backplane Communication and I\/O Density Scaling\u003c\/h3\u003e\n\u003cp\u003eThe module communicates through ControlLogix backplane cyclic scheduling, where 32-channel input data is transferred via slot-based deterministic arbitration. Input acquisition is synchronized with controller task execution, and module status diagnostics are embedded into backplane data frames.\u003c\/p\u003e\n\u003cp\u003eI\/O density scaling is implemented at chassis level, enabling high channel aggregation within a single slot allocation. Firmware compatibility and module recognition are determined during backplane enumeration at system startup.\u003c\/p\u003e\n\u003cp\u003eConformal coating is applied to the PCB assembly to stabilize electrical behavior under contaminant exposure, without altering backplane communication timing or input scan structure.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1756-IB32K support hot-swap replacement in a powered chassis?\u003cbr\u003eA: Hot-swap operation depends on ControlLogix chassis configuration. During removal, input state continuity is not guaranteed due to interruption of backplane scan synchronization.\u003c\/p\u003e\n\u003cp\u003eQ: What is the backplane current consumption under full operation?\u003cbr\u003eA: The module draws 120 mA at 5 VDC and 2 mA at 24 VDC from the ControlLogix backplane during active scanning.\u003c\/p\u003e\n\u003cp\u003eQ: How does input delay affect signal acquisition?\u003cbr\u003eA: The module uses a 420 microseconds base delay plus selectable filter time, which defines minimum detectable transition timing before backplane update.\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 stable backplane power before energizing field circuits. Ensure full seating of 1756-TBCH or 1756-TBS6H terminal blocks to maintain all 32 input channel connections.\u003c\/p\u003e\n\u003cp\u003eMaintain separation between DC input wiring and high-frequency switching conductors to reduce induced coupling on sinking input circuits. Shield termination shall be implemented at a single-point grounding reference inside the control cabinet.\u003c\/p\u003e\n\u003cp\u003eVerify input mapping, voltage configuration, and module diagnostics within ControlLogix programming environment prior to commissioning. Avoid mixing external reference potentials across adjacent input groups to preserve signal integrity.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43601335353434,"sku":"1756-IB32K","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-IB32K2.jpg?v=1783307888","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-ib32k-controllogix-digital-dc-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}