{"product_id":"siemens-6es7431-7qh00-0ab0-universal-analog-input","title":"Siemens 6ES7431-7QH00-0AB0 | Universal Analog Input","description":"\u003ch2\u003eSiemens 6ES7431-7QH00-0AB0 - Universal 16-Channel High-Density Analog Input Module\u003c\/h2\u003e\n\u003cp\u003eMeet the ultimate measurement solution: the Siemens \u003cb\u003e6ES7431-7QH00-0AB0\u003c\/b\u003e. This flagship analog input module for SIMATIC S7-400 PLCs combines high channel count with exceptional versatility. It offers \u003cb\u003e16 fully isolated inputs\u003c\/b\u003e with \u003cb\u003e16-bit resolution\u003c\/b\u003e, capable of directly connecting to virtually any analog sensor: voltage, current, resistance, \u003cb\u003ePt100\/1000 RTDs\u003c\/b\u003e, and all major \u003cb\u003ethermocouple types\u003c\/b\u003e, complete with advanced diagnostics and alarm functions.\u003c\/p\u003e\n\u003ch3\u003eWhy Choose This Module?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eMaximum Versatility:\u003c\/b\u003e One module handles all common sensor types—RTDs, T\/Cs, voltage, current, resistance—reducing part numbers and spare parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh Channel Density:\u003c\/b\u003e 16 isolated inputs in a standard width, saving crucial rack space in your S7-400 control cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSensor Power Supply:\u003c\/b\u003e Integrated 24V DC loop power for 2-wire transmitters (4-20mA), simplifying wiring and external power needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutstanding Accuracy:\u003c\/b\u003e High 16-bit resolution and excellent basic accuracy (e.g., ±0.15% for voltage) ensure trustworthy data for critical processes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eComplete Technical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eBrand \u0026amp; Series:\u003c\/b\u003e Siemens SIMATIC S7-400\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFull Model Number:\u003c\/b\u003e 6ES7431-7QH00-0AB0 (Analog Input SM 431)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eModule Type:\u003c\/b\u003e 16-Channel Universal Analog Input, Isolated\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInput Channels:\u003c\/b\u003e 16 (Voltage\/Current), 8 (Resistance\/RTD)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHigh Resolution:\u003c\/b\u003e 16 bits\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSupported Signals:\u003c\/b\u003e Voltage, Current (2-wire \u0026amp; 4-wire), Resistance, RTD (Pt, Ni), Thermocouple (Types B, E, J, K, L, N, R, S, T, U)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eVoltage Ranges:\u003c\/b\u003e ±10V, ±5V, ±2.5V, ±1V, ±500mV, ±250mV, ±80mV, ±50mV, ±25mV, 1-5V\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCurrent Ranges:\u003c\/b\u003e 4-20mA, 0-20mA, ±20mA, ±10mA, ±5mA\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRTD Types:\u003c\/b\u003e Pt100, Pt200, Pt500, Pt1000, Ni100, Ni1000\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eBasic Accuracy (at 25°C):\u003c\/b\u003e ±0.15% (Voltage\/Current), ±0.3% (RTD)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eConversion Time:\u003c\/b\u003e Configurable: 6 ms, 20.1 ms, 23.5 ms\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eNoise Rejection:\u003c\/b\u003e Selectable for 50 Hz, 60 Hz, or 400 Hz interference\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e2-Wire Transmitter Supply:\u003c\/b\u003e 24V DC (Up to 400 mA total for all channels)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower from Backplane:\u003c\/b\u003e 5V DC, max 700 mA\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eModule Power Loss:\u003c\/b\u003e Typically 4.5 W\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInput Impedance:\u003c\/b\u003e 1 MΩ (Voltage\/Thermocouple), 50 Ω (Current)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMax Cable Length:\u003c\/b\u003e 200 m (50 m for thermocouples on low mV ranges)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eIsolation:\u003c\/b\u003e Channel-to-channel and channel-to-backplane isolation (Tested at 2120V DC)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDimensions (W x H x D):\u003c\/b\u003e 25 mm x 290 mm x 210 mm\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWeight:\u003c\/b\u003e Approximately 500 g\u003c\/p\u003e\n\u003ch3\u003eInstallation \u0026amp; Sensor Connection\u003c\/h3\u003e\n\u003cp\u003eThis module installs in any S7-400 rack slot. Its key feature is supporting \u003cb\u003e2-wire 4-20mA transmitters directly\u003c\/b\u003e by providing loop power from the integrated 24V supply—no separate power supply needed per transmitter. For best accuracy with RTDs and resistance, use the 3-wire or 4-wire connection mode to cancel lead resistance errors. Configure each channel independently in the Siemens STEP 7 hardware configurator.\u003c\/p\u003e\n\u003ch3\u003ePackage \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eWhat's in the Box:\u003c\/b\u003e One factory-new Siemens 6ES7431-7QH00-0AB0 universal analog input module.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQuality Assurance:\u003c\/b\u003e This product is covered by a comprehensive \u003cb\u003e12-month warranty\u003c\/b\u003e.\u003c\/p\u003e\n\u003ch3\u003eFast Global Shipping\u003c\/h3\u003e\n\u003cp\u003eOrder with confidence for quick delivery via \u003cb\u003eFedEx, UPS, or DHL\u003c\/b\u003e.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eWhat is the main advantage of this module over others?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eIts unparalleled sensor support in a high-density 16-channel design. It eliminates the need for multiple specialized modules, simplifying design, procurement, and maintenance for complex systems with mixed sensors.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHow do I power my 4-20mA sensors with this module?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eFor 2-wire transmitters, simply connect them. The module provides the loop power (24V) internally. For 4-wire (active) transmitters with their own power supply, use the 4-wire measurement mode.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCan I measure Pt100 with 2-wire, 3-wire, and 4-wire connections?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eYes, it supports all three connection methods. For accurate temperature measurement, always use \u003cb\u003e3-wire or 4-wire connection\u003c\/b\u003e to compensate for cable resistance, especially with long cable runs.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWhat is the fastest sampling rate for all 16 channels?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eAt the fastest conversion time of 6ms per channel, the module can theoretically scan all 16 channels in about 96ms. Use this setting for fast-changing processes.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWhat diagnostics does it offer?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eIt provides comprehensive diagnostics including wire break detection (for current loops and RTDs), over\/under-range alarms, and configurable high\/low limit value monitoring with interrupt capability to alert the CPU immediately.\u003c\/p\u003e\n\u003cp\u003e© 2026 Ubest Automation Limited. All rights reserved.\u003cbr\u003eOriginal Source: \u003ca href=\"https:\/\/www.ubestplc.com\/\"\u003ehttps:\/\/www.ubestplc.com\/\u003c\/a\u003e\u003cbr\u003eContact: \u003ca href=\"mailto:sales@ubestplc.com\"\u003esales@ubestplc.com\u003c\/a\u003e Phone: \u003ca href=\"https:\/\/wa.me\/8618030005825\"\u003e+86 180 3000 5825\u003c\/a\u003e\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":51494356386074,"sku":"6ES7431-7QH00-0AB0","price":184.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/6240\/4634\/files\/6ES7431-7QH00-0AB0.jpg?v=1789876412","url":"https:\/\/www.ubestplc.com\/products\/siemens-6es7431-7qh00-0ab0-universal-analog-input","provider":"Ubest Automation Limited","version":"1.0","type":"link"}