{"product_id":"schneider-electric-triconex-3721-3721-analog-input-module","title":"Schneider Electric Triconex 3721 | 3721 Analog Input Module","description":"\u003ch3\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTriconex 3721 (Part No. 3721)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-reliability Analog Input Module engineered for integration with the Tricon™ Triple Modular Redundancy (TMR) system by Schneider Electric. Designed for mission-critical safety applications, this module provides accurate analog signal acquisition while ensuring fault tolerance and continuous operation. Its architecture guarantees that a single hardware or wiring fault does not compromise process safety or trigger unintended shutdowns.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eCore Features\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eTriple Modular Redundancy (TMR) Architecture\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eThree independent processing legs (A, B, C) with 2-out-of-3 voting logic\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eElectrical isolation between legs to prevent fault propagation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eContinuous monitoring for \"stuck-at\" faults and signal drift\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Precision Analog Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e32 differential analog input channels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInput voltage ranges: 0–5 VDC or ±5 VDC with ±6% tolerance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInput current support: 4–20 mA via compatible termination panels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eResolution: Selectable 12-bit or 14-bit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSampling\/Update rate: 10 ms per channel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAccuracy: Better than 0.15% of Full Scale Reading (FSR) from 0°C to 60°C\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCommon-mode rejection: -85 dB (DC–100 Hz)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInput overrange protection: 150 VDC \/ 115 VAC continuous\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIndustrial-Grade Design\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eWeight: 1.36 kg; Shipping weight: 4 kg\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHigh immunity to EMI and vibration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCertified for SIL 3 applications according to IEC 61508\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHot-swappable module for online maintenance without process interruption\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003eFeature\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\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e32 Differential, DC-Coupled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Type\u003c\/td\u003e\n\u003ctd\u003eVoltage\/Current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e0–5 VDC or ±5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e12-bit or 14-bit programmable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Update Rate\u003c\/td\u003e\n\u003ctd\u003e10 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.15% FSR (0–60°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommon Mode Rejection\u003c\/td\u003e\n\u003ctd\u003e-85 dB (DC–100 Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Protection\u003c\/td\u003e\n\u003ctd\u003e150 VDC \/ 115 VAC continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eLow heat dissipation for chassis operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003e≥1500 VDC field-to-logic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.36 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eEmergency Shutdown (ESD) Systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFire \u0026amp; Gas (F\u0026amp;G) Monitoring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBurner Management Systems (BMS)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTurbomachinery Control (TMC)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the module be replaced while the system is running?\u003c\/strong\u003e\u003cbr\u003eA: Yes, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTriconex 3721\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esupports hot-swapping without interrupting safety functions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the module support both voltage and current inputs?\u003c\/strong\u003e\u003cbr\u003eA: Yes, it supports 0–5 VDC or ±5 VDC and 4–20 mA input signals (with appropriate external termination panels).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the module suitable for SIL 3 systems?\u003c\/strong\u003e\u003cbr\u003eA: Yes, it is designed and certified for SIL 3 safety-critical applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How is signal accuracy ensured across harsh environments?\u003c\/strong\u003e\u003cbr\u003eA: The module features continuous diagnostics, high common-mode rejection, and triple-leg voting to maintain signal integrity.\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Triconex","offers":[{"title":"Default Title","offer_id":44121703317603,"sku":"3721","price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/2775\/3315\/files\/TRICONEX3721.jpg?v=1776390993","url":"https:\/\/precisemodule.com\/products\/schneider-electric-triconex-3721-3721-analog-input-module","provider":"Precise Module Ltd.","version":"1.0","type":"link"}