{"product_id":"allen-bradley-1794-ie8-b-flex-i-o-analog-input-module","title":"Allen-Bradley 1794-IE8\/B FLEX I\/O Analog Input Module","description":"\u003ch2\u003eAllen-Bradley 1794-IE8\/B FLEX I\/O Analog Input Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for isolated analog signal acquisition in the FLEX I\/O System network, the \u003cstrong\u003eAllen-Bradley 1794-IE8\/B\u003c\/strong\u003e (\u003cstrong\u003e1794-IE8\u003c\/strong\u003e Analog Input Module) provides direct physical\/electrical execution for converting field voltage and current inputs into PLC-accessible digital data values.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1794-IE8\/B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley \/ Rockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e3.0 W maximum @ 31.2 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Series\u003c\/td\u003e\n\u003ctd\u003eFLEX I\/O System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eAnalog Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e8 single-ended isolated analog inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal Range\u003c\/td\u003e\n\u003ctd\u003e0 to 10 V DC, +\/-10 V DC, 0 to 5 V DC, +\/-5 V DC, 0 to 20 mA DC, 4 to 20 mA DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e12-bit plus sign, 16-bit effective format\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Format\u003c\/td\u003e\n\u003ctd\u003e16-bit 2's complement integer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Type\u003c\/td\u003e\n\u003ctd\u003eSuccessive Approximation Register (SAR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Rate\u003c\/td\u003e\n\u003ctd\u003e256 us for all channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance\u003c\/td\u003e\n\u003ctd\u003eVoltage input: \u0026gt; 10 Mohm; Current input: 250 ohm nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal DC Power\u003c\/td\u003e\n\u003ctd\u003e24 V DC nominal, 10.5 to 31.2 V DC range including 5% AC ripple\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal DC Current\u003c\/td\u003e\n\u003ctd\u003e60 mA @ 24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAbsolute Accuracy\u003c\/td\u003e\n\u003ctd\u003e0.20% of full scale @ 25 deg C for voltage and current inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e50 V continuous, tested at 850 V DC for 1 s between user wiring and system logic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eEtherNet\/IP and FLEX I\/O Data Handling\u003c\/h3\u003e\n\u003cp\u003eThe 1794-IE8\/B operates as an analog acquisition node within the FLEX I\/O architecture. The module receives voltage or current signals from field devices and transfers converted digital values through a FLEX I\/O communication adapter connected to PLC\/PAC control systems. The module supports deterministic I\/O data exchange through compatible adapters including EtherNet\/IP, ControlNet, and PROFIBUS DP interfaces.\u003c\/p\u003e\n\u003cp\u003eThe Series B hardware revision defines a specific module generation with corresponding firmware compatibility requirements. System configuration should verify adapter communication parameters and controller I\/O profile compatibility before installation.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What type of field signals can the 1794-IE8\/B process?\u003cbr\u003eA: The module accepts single-ended analog voltage and current inputs including 0 to 10 V DC, +\/-10 V DC, 0 to 5 V DC, +\/-5 V DC, 0 to 20 mA DC, and 4 to 20 mA DC signals.\u003c\/p\u003e\n\u003cp\u003eQ: Does the 1794-IE8\/B provide channel isolation between analog inputs?\u003cbr\u003eA: The module provides isolation between user wiring and system logic. Channel-to-channel isolation specifications are not provided in the supplied technical data.\u003c\/p\u003e\n\u003cp\u003eQ: What are the power requirements of the module?\u003cbr\u003eA: The module requires external 24 V DC nominal power and draws 60 mA at 24 V DC. Maximum power dissipation is specified as 3.0 W at 31.2 V DC.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1794-IE8\/B on a compatible FLEX I\/O terminal base and verify mechanical engagement before applying field wiring. Use shielded instrumentation cable for analog signal connections where required by the installation environment. Connect cable shields according to the plant grounding standard to reduce electrical noise coupling.\u003c\/p\u003e\n\u003cp\u003eSeparate analog input wiring from high-current power conductors, motor cables, and switching outputs to minimize induced interference. Confirm that field transmitters and sensors share compatible signal reference points with the module input circuitry before commissioning.\u003c\/p\u003e\n\u003cp\u003eVerify the external 24 V DC supply polarity, voltage range, and current capacity before energizing the module. Confirm controller configuration, adapter communication settings, and I\/O mapping before placing the channel values into process control operation.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43768323309658,"sku":"1794-IE8\/B","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1794-IE81.jpg?v=1785484421","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1794-ie8-b-flex-i-o-analog-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}