{"product_id":"allen-bradley-1794-ie12-flex-i-o-analog-input-module","title":"Allen-Bradley 1794-IE12 FLEX I\/O Analog Input Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1794-IE12\u003c\/strong\u003e is a high-density analog input module engineered to function within the \u003cstrong\u003eFLEX I\/O\u003c\/strong\u003e distributed hardware platform. This modular component provides twelve single-ended, non-isolated input channels designed to convert analog current or voltage signals from industrial transmitters into digital data for processing. By deploying this module adjacent to machinery on a local DIN rail, industrial facilities can significantly reduce field wiring runs by transmitting data back to a central processor via an appropriate network adapter over \u003cstrong\u003eEtherNet\/IP\u003c\/strong\u003e, \u003cstrong\u003eControlNet\u003c\/strong\u003e, or \u003cstrong\u003eDeviceNet\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eOperating over selectable ranges including \u003cstrong\u003e4 to 20 mA\u003c\/strong\u003e and \u003cstrong\u003e0 to 10V DC\u003c\/strong\u003e, the unit incorporates successive-approximation analog-to-digital converters to ensure precise measurement tracking. The \u003cstrong\u003e1794-IE12\u003c\/strong\u003e plugs directly into a compatible terminal base unit, which manages the field-side wiring and provides the internal backplane connection. This layout is standard in continuous processing applications, water treatment automation, HVAC infrastructure control, and complex power generation monitoring where multi-channel instrumentation density is critical.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTwelve single-ended analog input channels housed within a single small-footprint assembly.\u003c\/li\u003e\n\u003cli\u003eUser-configurable input profiles for either current loop or voltage source instrumentation.\u003c\/li\u003e\n\u003cli\u003eRemoval and Insertion Under Power (RIUP) allowing hardware maintenance without shutting down the system bus.\u003c\/li\u003e\n\u003cli\u003eLED indicators providing visible confirmation of module operational status and internal bus health.\u003c\/li\u003e\n\u003cli\u003eHigh-density termination matrix optimizing control cabinet enclosure layout spacing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-tank liquid level and volumetric measurement monitoring.\u003c\/li\u003e\n\u003cli\u003eIndustrial furnace and boiler thermal tracking networks.\u003c\/li\u003e\n\u003cli\u003eMainline distribution header hydraulic pressure logging.\u003c\/li\u003e\n\u003cli\u003eContinuous emissions monitoring systems (CEMS) in utility plants.\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-IE12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eHigh-Density Analog Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e12 Channels, Single-Ended, Non-Isolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal Ranges\u003c\/td\u003e\n\u003ctd\u003e4 to 20 mA, 0 to 20 mA, +\/-10V DC, 0 to 10V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e12-bit unipolar, 11-bit plus sign bipolar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance (Voltage)\u003c\/td\u003e\n\u003ctd\u003e100 kilohms minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance (Current)\u003c\/td\u003e\n\u003ctd\u003e238 ohms nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexBus Current Draw\u003c\/td\u003e\n\u003ctd\u003e80 mA at 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal DC Power Voltage\u003c\/td\u003e\n\u003ctd\u003e24V DC nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal DC Power Range\u003c\/td\u003e\n\u003ctd\u003e10V DC to 31.2V DC\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\u003eApproximate Weight\u003c\/td\u003e\n\u003ctd\u003e0.09 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApproximate Dimensions\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\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput 0 to Input 11\u003c\/td\u003e\n\u003ctd\u003eSingle-Ended Positive Signal Input Nodes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Return\u003c\/td\u003e\n\u003ctd\u003eShared Analog Common Return Terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e+V (External Power)\u003c\/td\u003e\n\u003ctd\u003e24V DC External Operational Source Input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCOM (External Power)\u003c\/td\u003e\n\u003ctd\u003eDC Power Return Reference Point\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\u003eHook the top portion of the module structural housing into the upper ridge of standard 35 mm DIN mounting tracking. Pivot the lower portion of the enclosure downward firmly until the integrated locking clips engage onto the lower metal rail lip.\u003c\/p\u003e\n\u003ch3\u003eTerminal Base Seating\u003c\/h3\u003e\n\u003cp\u003eAlign the guide keys located along the bottom edge of the hardware module with the receiving channels on the pre-wired terminal base unit. Slide the unit directly downward into the base structural framework until the retention latches snap shut.\u003c\/p\u003e\n\u003ch3\u003eShielding and Grounding\u003c\/h3\u003e\n\u003cp\u003eRun shielded twisted-pair cables for all analog input lines. Ground the cable shield drain wires exclusively at the dedicated ground bus bars on the terminal base unit to avoid creating earth ground loops across the field environment.\u003c\/p\u003e\n\u003ch3\u003eCable Routing\u003c\/h3\u003e\n\u003cp\u003eIsolate all analog instrumentation signal conduits from high-power AC mains cabling, variable frequency drive motor leads, and heavy inductive switching circuits to mitigate electromotive field coupling and signal noise.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat types of signals can this module accept from field instruments?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt can be software-configured to accept either direct current ranges or standard analog voltage potential fields.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this module provide electrical isolation between individual input channels?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, the twelve channels are single-ended and reference a shared internal common signal return path.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan an engineer swap this unit while the rest of the FLEX I\/O rail is active?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the module supports removal and insertion under power, allowing field service without interrupting communication to adjacent modules.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat happens if a field signal wire breaks or drops below 4 mA?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe processing register sets an under-range bit corresponding to that specific input channel to alert the logic controller of a fault.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs an external power supply required to drive this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, it requires an external 24V DC power feed wired directly through the terminal base to power the analog conversion circuitry.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich terminal base structures are recommended for this component?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe unit operates with multi-terminal block bases including the 1794-TB3G or 1794-TB3GS configurations which handle the high-density signal count.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the digital conversion resolution of the incoming analog parameters?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module utilizes a 12-bit analog-to-digital converter architecture to represent field values within the system registers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this device measure negative voltage ranges from sensors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, it can be configured to process bipolar voltage inputs across a negative ten to positive ten volt range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is the specific signal range for a channel programmed?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe engineering ranges are defined by writing specific configuration words to the module output registers via the PLC software environment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the module require field calibration before plant startup?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module is calibrated during factory production, but zero and span configurations can be monitored and tweaked electronically through the host system.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52695180476779,"sku":"1794-IE12","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/allen-bradley-1794-ie12-analog-input-module-1gcwjr503rw_fa369080-b631-4f62-878e-d398bd793af8.jpg?v=1766114267","url":"https:\/\/www.plcprotech.com\/products\/allen-bradley-1794-ie12-flex-i-o-analog-input-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}