{"product_id":"allen-bradley-1756-ib16-16-point-24vdc-input-module","title":"Allen-Bradley 1756-IB16 16-Point 24VDC Input Module","description":"\u003ch3 style=\"font-weight: bold;\"\u003eHardware Architecture \u0026amp; Digital Input Overview\u003c\/h3\u003e\n\u003cp\u003eThe Allen-Bradley \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1756-IB16\u003c\/strong\u003e\u003c\/span\u003e is a robust 16-point discrete DC input module engineered for the ControlLogix platform. Operating across a nominal voltage of 12\/24V DC with an allowable range of 10 to 31.2 VDC, this sinking input module manages 16 channels divided into 2 isolated groups. Designed for direct installation into any local or remote ControlLogix chassis slot, it integrates smoothly with removable terminal block housings such as the 1756-TBNH and 1756-TBSH to streamline field wiring and maintenance.\u003c\/p\u003e\n\u003cp\u003eGlobal PLC Spare HUB's Insight: During a critical plant automation expansion for a water treatment facility in Ohio, our systems integration group deployed the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1756-IB16\u003c\/strong\u003e\u003c\/span\u003e to interface high-speed digital feedback signals from localized pump skids. Utilizing the module's Change of State (COS) property allowed our control logic to bypass standard processor sweep scans for high-priority flow-interruption interlocks, drastically reducing response latency in safety-critical loops.\u003c\/p\u003e\n\u003ch3 style=\"font-weight: bold;\"\u003eTechnical Specifications \u0026amp; Electrical Parameters Matrix\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse: collapse; width: 100%; border-color: #ddd;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003cth style=\"text-align: left;\"\u003eEngineering Parameter\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003eTechnical Specification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer \u0026amp; Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley \/ Rockwell Automation (\u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-1756-controllogix\"\u003eControlLogix\u003c\/a\u003e)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCatalog Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1756-IB16\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Channels \u0026amp; Grouping\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 Sinking Inputs configured in 2 independent groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 to 31.2 VDC (Nominal 12\/24 VDC Sink)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBackplane Current Draw\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120 mA at 5.1 VDC; 2 mA at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThermal \u0026amp; Power Dissipation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMaximum 5.1 Watts power dissipation; 21.1 BTU\/hr thermal output at 60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Terminal Blocks\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1756-TBNH (NEMA screw), 1756-TBSH (Spring clamp), 1756-TBCH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIsolation Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e250 Volts continuous basic insulation rating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"font-weight: bold;\"\u003eDiagnostic Capabilities \u0026amp; Signal Processing\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChange of State (COS) Execution:\u003c\/strong\u003e Instantly notifies the controller upon digital state transitions, bypassing standard scan cycles for immediate logic execution on critical inputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfigurable Input Filters:\u003c\/strong\u003e User-settable filter times (0, 1, or 2 ms for OFF-to-ON; up to 18 ms for ON-to-OFF) eliminate electrical contact bounce noise.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectronic Keying Support:\u003c\/strong\u003e Prevents physical module mismatch errors during maintenance replacements by enforcing strict slot profile matching in Studio 5000.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Threshold Monitoring:\u003c\/strong\u003e Tracks active input current states from 2.0 mA minimum operating threshold up to 10 mA maximum at 31.2V DC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"font-weight: bold;\"\u003eTarget Equipment \u0026amp; Industrial Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Hardware:\u003c\/strong\u003e ControlLogix 1756 chassis backplanes, standard\/redundant power supplies, and PlantPaX DCS architectures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiscrete Manufacturing:\u003c\/strong\u003e High-speed assembly lines monitoring proximity switches, photoelectric sensors, and limit switches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess Automation:\u003c\/strong\u003e Chemical dosing skids and valve position feedback arrays requiring dependable 24VDC discrete monitoring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInfrastructure Systems:\u003c\/strong\u003e Municipal pump stations and remote terminal units (RTUs) operating in harsh industrial environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"font-weight: bold;\"\u003eLogistics, Warranty \u0026amp; Fulfillment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Terms:\u003c\/strong\u003e Covered by a comprehensive 12-month manufacturer warranty from the verified invoice date.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Delivery Network:\u003c\/strong\u003e Expedited, secure international transport dispatched via trusted air freight carriers including FedEx, UPS, and DHL.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcessing Lead Time:\u003c\/strong\u003e Standard stock orders undergo strict quality verification and ship within 24 to 48 hours.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"font-weight: bold;\"\u003eProfessional Frequently Asked Questions \u0026amp; Buying Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What specific functional difference exists between the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1756-IB16\u003c\/strong\u003e\u003c\/span\u003e and sourcing input modules?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1756-IB16\u003c\/strong\u003e\u003c\/span\u003e is a DC sinking input module, meaning it accepts current flowing from field sensors into the module common, requiring compatible sourcing-type output field devices.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Purchasing Guidance: How do I select the correct Removable Terminal Block (RTB) for installation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Match your wiring preference to the housing; choose the 1756-TBNH for traditional NEMA screw connections or the 1756-TBSH \/ 1756-TBCH for fast spring-clamp wire terminations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this 24VDC input module handle occasional AC voltage signals from legacy field devices?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: No, direct connection of AC voltages will damage the module; however, you can interface AC signals by installing appropriate interposing relay circuits ahead of the input terminals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What troubleshooting steps apply if an input channel fails to register a state change in software?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Verify that the incoming DC voltage across the terminal measures between 10V and 31.2V, check for secure wire termination in the RTB, and confirm that input filter settings are not masking fast pulses.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does adding multiple \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003e1756-IB16\u003c\/strong\u003e\u003c\/span\u003e modules require upgrading the chassis power supply?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Each module draws 120 mA from the 5.1V backplane rail; always calculate total system backplane loading against your installed 1756 power supply capacity prior to expansion.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013808775350,"sku":"1756-IB16","price":169.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1756-IB16.jpg?v=1787734311","url":"https:\/\/www.plcsparehub.com\/products\/allen-bradley-1756-ib16-16-point-24vdc-input-module","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}