{"product_id":"allen-bradley-1794-ij2-frequency-input-module","title":"Allen-Bradley 1794-IJ2 FLEX I\/O Frequency Input Module","description":"\u003cp\u003eThe Allen-Bradley 1794-IJ2 is a high-performance, dual-channel frequency input module engineered for the FLEX I\/O 1794 platform. This module is designed to process high-speed pulse signals, providing real-time data on acceleration, velocity, and direction. By performing local signal processing, the 1794-IJ2 reduces the computational load on the central controller, ensuring low-latency performance in demanding industrial applications.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Channel Processing:\u003c\/strong\u003e Features two independent channels, each equipped with a primary frequency input and a gate control input.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad Frequency Range:\u003c\/strong\u003e Capable of processing sine and square wave signals from 1 to 32 kHz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfigurable Sample Windows:\u003c\/strong\u003e Supports user-defined sampling windows between 2 and 1000 ms, allowing for highly precise resolution adjustments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Alarm Logic:\u003c\/strong\u003e Onboard hardware allows for direct mapping to frequency or acceleration alarms with a response time of 0.5 ms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiagnostic Capabilities:\u003c\/strong\u003e Includes front-panel LED indicators for status monitoring and wire-off fault detection to ensure system integrity.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis module is ideal for applications requiring precise monitoring of rotating machinery and flow systems, including:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTurbine flowmeter tracking\u003c\/li\u003e\n\u003cli\u003eHigh-speed fan tachometer feedback\u003c\/li\u003e\n\u003cli\u003eWeb tension control systems\u003c\/li\u003e\n\u003cli\u003eRotating machinery diagnostic loops\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1794-IJ2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs\u003c\/td\u003e\n\u003ctd\u003e2 Frequency \/ 2 Gate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003e2 Sourced, Isolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Bandwidth\u003c\/td\u003e\n\u003ctd\u003e1 to 32 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current\u003c\/td\u003e\n\u003ctd\u003e1.0 A per channel (continuous)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e0.5 ms (Turn-on) \/ 1.0 ms (Turn-off)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e19.0 to 31.2 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Bases\u003c\/td\u003e\n\u003ctd\u003e1794-TB3G, 1794-TB3GS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the module is installed on a compatible 1794-TB3G or 1794-TB3GS terminal base.\u003c\/li\u003e\n\u003cli\u003eThe module is designed for 35 mm DIN rail or direct panel mounting; ensure proper clearance for ventilation.\u003c\/li\u003e\n\u003cli\u003eAlways disconnect external power before inserting or removing the module from the terminal base to prevent electrical damage.\u003c\/li\u003e\n\u003cli\u003eUse shielded cabling for input signals to minimize EMI interference in high-speed pulse applications.\u003c\/li\u003e\n\u003cli\u003eEnsure the module is housed within an appropriate industrial enclosure, as it is an open-style device.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: What is the primary function of the 1794-IJ2?\u003c\/strong\u003e\u003cbr\u003eA: It is a frequency input module that processes pulse trains locally to calculate speed, direction, and acceleration, offloading these tasks from the main PLC.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Does this module require an external power supply?\u003c\/strong\u003e\u003cbr\u003eA: Yes, it requires an external 24 VDC power supply (19.0 to 31.2 VDC range) for operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can this module detect broken wires?\u003c\/strong\u003e\u003cbr\u003eA: Yes, the 1794-IJ2 includes a wire-off fault detection feature that alerts the system if an open-circuit condition occurs on the sensor lines.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":51099168178428,"sku":"1794-IJ2","price":92.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_cb688295-8b85-402b-88be-1843317d5e5a.jpg?v=1788032305","url":"https:\/\/www.electronicplc.com\/es\/products\/allen-bradley-1794-ij2-frequency-input-module","provider":"Electronic PLC","version":"1.0","type":"link"}