{"product_id":"allen-bradley-1794-ib16-flex-i-o-digital-sinking-input-module","title":"Allen-Bradley 1794-IB16 FLEX I\/O Digital Sinking Input Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1794-IB16\u003c\/strong\u003e is a high-density discrete input hardware component designed for the \u003cstrong\u003eFLEX I\/O\u003c\/strong\u003e distributed network terminal system. This module functions as a 24V DC binary status processor, translating raw electrical voltage conditions from physical sensors into logical data bits utilized by a master logic controller. Operating within a sinking current configuration, the internal circuits route electricity from sourcing field-side elements to a centralized return node, managing reliable state classification across automated plant networks.\u003c\/p\u003e\n\u003cp\u003eEquipped with sixteen non-isolated input channels, the device scales installation densities inside small control cabinet spaces while driving down overall hardware footprints. The \u003cstrong\u003e1794-IB16\u003c\/strong\u003e handles signal data routing over wide networks by linking back to main processors via appropriate \u003cstrong\u003eFLEX I\/O\u003c\/strong\u003e network adapters over \u003cstrong\u003eEtherNet\/IP\u003c\/strong\u003e, \u003cstrong\u003eControlNet\u003c\/strong\u003e, or \u003cstrong\u003eDeviceNet\u003c\/strong\u003e system buses. The module mounts directly into pre-wired terminal base assemblies, allowing for immediate bus linking and quick deployment in packaging systems, high-speed sorting facilities, pump station automation, and assembly machinery loops.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSixteen discrete sinking input channels enabling dense field sensor aggregation.\u003c\/li\u003e\n\u003cli\u003eNominal 24V DC operational envelope matching industrial proximity switches and limit devices.\u003c\/li\u003e\n\u003cli\u003eSupport for Removal and Insertion Under Power (RIUP) enabling hot-swapping during live bus states.\u003c\/li\u003e\n\u003cli\u003eIndividual front-panel light-emitting diode indicators displaying real-time logic states per point.\u003c\/li\u003e\n\u003cli\u003eConfigurable digital filter timing constraints to filter external inductive contact bounce.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProximity sensor matrix tracking and pneumatic cylinder positioning loops.\u003c\/li\u003e\n\u003cli\u003eFactory operator panel pushbutton stations and selector switch array inputs.\u003c\/li\u003e\n\u003cli\u003eConveyor track jam detection, alignment switches, and counting sensors.\u003c\/li\u003e\n\u003cli\u003eSafety enclosure door interlocks and physical mechanical limit switch logging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation \/ Allen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFLEX I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1794-IB16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDigital Sinking Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e16 Channels, Non-Isolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Input Voltage\u003c\/td\u003e\n\u003ctd\u003e24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn-State Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10V DC to 31.2V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn-State Current Range\u003c\/td\u003e\n\u003ctd\u003e2.0 mA minimum to 12.0 mA maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal On-State Current\u003c\/td\u003e\n\u003ctd\u003e8.0 mA at 24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-State Voltage Maximum\u003c\/td\u003e\n\u003ctd\u003e5.0V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-State Current Maximum\u003c\/td\u003e\n\u003ctd\u003e1.5 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Input Impedance\u003c\/td\u003e\n\u003ctd\u003e4.6 kilohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexBus Current Draw\u003c\/td\u003e\n\u003ctd\u003e30 mA at 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous Isolation Voltage\u003c\/td\u003e\n\u003ctd\u003e50V (Basic Insulation Type)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Filter Time (On to Off)\u003c\/td\u003e\n\u003ctd\u003eProgrammable (0.25 ms nominal to 8.0 ms maximum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 55 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e5% to 95% non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.09 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e46 mm x 94 mm x 53 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eConnections\/Interfaces\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eTerminal Connection Block Node\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eFunction \/ Signal Path Allocation\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal 0 to Terminal 15\u003c\/td\u003e\n\u003ctd\u003eDiscrete Sinking Input Channels 0 through 15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e+V (External Supply Node)\u003c\/td\u003e\n\u003ctd\u003e24V DC Sourcing Sensor Operational Power Distribution Path\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCOM (External Supply Return)\u003c\/td\u003e\n\u003ctd\u003eCommon Direct Current System Ground Reference Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003ch3\u003eDIN Rail Installation\u003c\/h3\u003e\n\u003cp\u003eEngage the upper retention hooks of the rear module housing onto the top track flange of standard 35 mm DIN rail lines. Push down and pivot the bottom portion of the enclosure inward until the embedded steel latch assembly locks around the lower tracking rail lip.\u003c\/p\u003e\n\u003ch3\u003eTerminal Base Seating\u003c\/h3\u003e\n\u003cp\u003eAlign the integrated physical guide tracks located on the bottom face of the operational module with the receiving key slots on the pre-installed terminal base unit. Slide the hardware firmly into the interface socket matrix until the dual side latches click outwards to lock it in place.\u003c\/p\u003e\n\u003ch3\u003eSinking Configuration Wiring\u003c\/h3\u003e\n\u003cp\u003eWire external sourcing components directly to input points 0 through 15. Run the primary positive 24V DC distribution leg through the matching power tier of the terminal base block to keep standard potential profiles common across all connected sensor nodes.\u003c\/p\u003e\n\u003ch3\u003eCabinet Cable Shielding\u003c\/h3\u003e\n\u003cp\u003eKeep low-voltage sensory signal lines separated from alternating current motor leads, active control power relays, and inductive drive fields within shared electrical conduit tracking to eliminate airborne electromagnetic signal distortion.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the sinking circuit configuration imply for field sensors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe sinking input configuration requires that all connected devices operate as current sourcing components, feeding voltage into the input points.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre individual input channels on this unit isolated from each other?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, the sixteen distinct input points are non-isolated and reference a shared common signal return line inside the electronic module.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan an automation engineer safely swap this device while power is applied?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the hardware includes removal and insertion under power capabilities, which allows for live replacement without disabling the wider bus adapter array.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich terminal base variations accommodate this specific input block?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module is paired with multi-tier terminal base blocks such as the 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3K, or 1794-TBN models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow can an operator stabilize high-frequency chatter from mechanical switch loops?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe digital input filter response constants can be modified inside the engineering programming software to clear up messy input signals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat parameters register as a reliable off-state condition?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA channel reads as an off-state when the voltage drops below 5.0V DC or the incoming loop current values fall under 1.5 mA.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this device require independent external power to process inputs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, a nominal 24V DC external electrical loop must be wired straight into the terminal base infrastructure to power the field-side sensing electronics.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat function do the yellow indicators on the top faceplate perform?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEach LED illuminates when its matching input point senses an active on-state voltage parameter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this specific model accept alternating current voltage inputs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, this module processes low-voltage direct current parameters exclusively across a 10V DC to 31.2V DC range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does this hardware pass discrete data blocks to a central PLC?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe unit transmits channel data bits across the local FlexBus backplane to a network adapter, which maps the data into network registers.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52695173857643,"sku":"1794-IB16","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/allen-bradley-1794-ib16-flex-16-point-digital-input-module-jq1gl25qkei_2b95908b-c757-4bf8-b8aa-96441d1530b3.jpg?v=1766114150","url":"https:\/\/www.plcprotech.com\/bg\/products\/allen-bradley-1794-ib16-flex-i-o-digital-sinking-input-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}