{"product_id":"allen-bradley-1794-ie12-flex-i-o-high-density-analog-input-module","title":"Allen-Bradley 1794-IE12 Flex I\/O High-Density Analog Input Module","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1794-IE12 is a high-density analog input module from the Flex I\/O family, engineered for accurate signal acquisition in demanding industrial environments. This module provides twelve (12) single-ended input channels configurable for 0 to 20 mA, 4 to 20 mA, ±10 VDC, and 0 to 10 VDC signal types, making it a versatile choice for interfacing transmitters, indicators, recorders, and controllers.\u003c\/p\u003e\u003cp\u003eWith a successive approximation conversion method and a 16-bit, left-justified resolution (320 µV\/count for voltage, 0.641 µA\/count for current), the 1794-IE12 delivers precise measurement for process control. Its 8.0 ms conversion rate across all channels ensures rapid data updates for time-sensitive applications. The module achieves an absolute accuracy of 0.1% full scale at 25 °C, with a drift of 0.004% full scale per °C, providing reliable performance across a wide temperature range.\u003c\/p\u003e\u003cp\u003eDesigned for use with the 1794-TB3G or 1794-TB3GS terminal bases, the 1794-IE12 integrates seamlessly into existing Flex I\/O installations. It requires a nominal 24V DC external supply (acceptable range: 10.0…31.2V DC) and consumes 80 mA from the FlexBus. The module's open-type enclosure and DIN rail mounting simplify installation, while a green\/red power\/status LED offers at-a-glance diagnostics.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eFlex I\/O High-Density Analog Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs\u003c\/td\u003e\n\u003ctd\u003e12 single-ended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Types\u003c\/td\u003e\n\u003ctd\u003e0 to 20 mA, 4 to 20 mA, ±10 VDC, 0 to 10 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Type\u003c\/td\u003e\n\u003ctd\u003eSuccessive Approximation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e16-bit, 2’s complement, left justified; Voltage: 320 µV\/cnt; Current: 0.641 µA\/cnt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Rate\u003c\/td\u003e\n\u003ctd\u003e8.0 ms all channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAbsolute Accuracy\u003c\/td\u003e\n\u003ctd\u003e0.1% full scale @ 25 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Base\u003c\/td\u003e\n\u003ctd\u003e1794-TB3G, 1794-TB3GS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicators\u003c\/td\u003e\n\u003ctd\u003e1 green\/red power\/status indicator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal DC Supply, Nominal\u003c\/td\u003e\n\u003ctd\u003e24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal DC Supply Range\u003c\/td\u003e\n\u003ctd\u003e10.0…31.2V DC (includes 5% AC ripple)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexBus Current\u003c\/td\u003e\n\u003ctd\u003e80 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e50V Continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e1.2W @ 31.2V DC max.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e4.1 BTU\/hr. @ 31.2V DC max.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eDIN Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 55 °C (32 to 131 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e–40…85 °C (–40…185 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibration\u003c\/td\u003e\n\u003ctd\u003e5g @ 10 to 500 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Shock\u003c\/td\u003e\n\u003ctd\u003e30 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Density:\u003c\/strong\u003e Twelve channels in a single module maximize I\/O capacity while saving panel space.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Signal Support:\u003c\/strong\u003e Accepts both current (4-20 mA, 0-20 mA) and voltage (±10 VDC, 0-10 VDC) inputs, reducing the need for multiple module types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Conversion:\u003c\/strong\u003e 8.0 ms conversion rate for all channels ensures real-time data capture for control loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision:\u003c\/strong\u003e 16-bit resolution and 0.1% full-scale accuracy deliver reliable measurements critical for quality and safety.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust Design:\u003c\/strong\u003e Vibration resistance (5g @ 10-500 Hz) and shock tolerance (30g) make it suitable for harsh industrial environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Integration:\u003c\/strong\u003e Works with standard Flex I\/O terminal bases and communication adapters, simplifying installation and maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eIndustry Applications\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1794-IE12 excels in applications requiring high channel density and precise analog measurement. Typical uses include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess Control:\u003c\/strong\u003e Monitoring temperature, pressure, and flow transmitters in chemical, oil \u0026amp; gas, and pharmaceutical plants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory Automation:\u003c\/strong\u003e Gathering analog signals from sensors on production lines for quality monitoring and machine control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUtilities \u0026amp; Infrastructure:\u003c\/strong\u003e Tracking voltage and current levels in power distribution and water treatment facilities.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor example, in a chemical processing plant, the 1794-IE12 can interface with 12 different 4-20 mA transmitters, feeding real-time data to a PLC for closed-loop control, ensuring consistent product quality and operational safety.\u003c\/p\u003e\u003ch2\u003eInstallation \u0026amp; Setup Guidance\u003c\/h2\u003e\u003cp\u003eInstallation of the 1794-IE12 is straightforward, but proper handling is essential for reliable operation. Follow these steps:\u003c\/p\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount the Terminal Base:\u003c\/strong\u003e Install the 1794-TB3G or 1794-TB3GS terminal base on a DIN rail in the control cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSet Keyswitch Position:\u003c\/strong\u003e Ensure the module’s keyswitch is set to position 3 to match the terminal base, preventing incorrect insertion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnect Wiring:\u003c\/strong\u003e Terminate field wiring to the terminal base according to the wiring diagram, ensuring proper polarity for current and voltage inputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure Module:\u003c\/strong\u003e Slide the 1794-IE12 into the terminal base until it clicks into place.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApply Power:\u003c\/strong\u003e Connect the external 24V DC supply within the acceptable range (10.0…31.2V DC) to the terminal base.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify Communication:\u003c\/strong\u003e Use the Flex I\/O communication adapter to confirm module recognition and configure input types via software.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003eAlways verify the keyswitch position and power connections before energizing the system. The module’s open-type enclosure requires installation in a suitable IP-rated cabinet to protect against dust and moisture.\u003c\/p\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003eThe 1794-IE12 is designed for long-term reliability, but routine checks help maximize uptime. Inspect the module and terminal base periodically for:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoose Connections:\u003c\/strong\u003e Tighten terminal screws and ensure the module is firmly seated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContamination:\u003c\/strong\u003e Keep the enclosure clean to prevent dust buildup that could affect heat dissipation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental Conditions:\u003c\/strong\u003e Monitor ambient temperature to stay within the 0 to 55 °C operating range; ensure proper ventilation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWith no moving parts, the module requires minimal maintenance—reducing total cost of ownership and minimizing downtime. Its robust construction and wide operating temperature range make it a dependable choice for continuous duty.\u003c\/p\u003e\u003ch2\u003eCompatibility \u0026amp; Integration\u003c\/h2\u003e\u003cp\u003eThe 1794-IE12 is part of the Rockwell Automation Flex I\/O family and works with a range of communication adapters, including ControlNet, DeviceNet, and EtherNet\/IP (when paired with the appropriate adapter). It is compatible with the 1794-TB3G and 1794-TB3GS terminal bases, and can be used with any Allen-Bradley PLC or control system that supports Flex I\/O. This flexibility simplifies integration into both new and existing installations.\u003c\/p\u003e\u003ch2\u003eBuying Guide\u003c\/h2\u003e\u003cp\u003eBefore purchasing the Allen-Bradley 1794-IE12, verify the following:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Base Compatibility:\u003c\/strong\u003e Ensure you have the correct 1794-TB3G or 1794-TB3GS terminal base for your application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e Confirm you have a stable 24V DC supply within the acceptable range (10.0…31.2V DC).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Signal Types:\u003c\/strong\u003e Check that your field devices match the supported input types (0-20 mA, 4-20 mA, ±10 VDC, 0-10 VDC).\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003ePLC Source PRO offers the Allen-Bradley 1794-IE12 with genuine parts and fast shipping. Our knowledgeable team can help you confirm compatibility and provide technical support. Choose PLC Source PRO for reliable automation spares that keep your operations running smoothly.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default","offer_id":44454061113443,"sku":"1794-IE12","price":270.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/1794-ACN15_202_ca19bd22-9799-4877-b24d-2b4cede93f10.jpg?v=1786119059","url":"https:\/\/www.plcsourcepro.com\/products\/allen-bradley-1794-ie12-flex-i-o-high-density-analog-input-module","provider":"PLC Source PRO","version":"1.0","type":"link"}