{"product_id":"triconex-3351-analog-input-module-32-point-tmr-3351","title":"Module d'entrée analogique 32 points TMR (3351) Triconex 3351","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3351 (3351)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-performance, 32-point Analog Input Module designed for the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTriconex\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTriple Modular Redundant (TMR) safety system. Operating within a standard\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e4–20 mA\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erange, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTriconex 3351\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides high-density monitoring for critical process variables in demanding environments such as oil and gas refineries, petrochemical plants, and power generation facilities. By utilizing three isolated input paths and sophisticated voting logic, this module ensures that a single hardware failure never compromises the Safety Instrumented System (SIS). The integration of the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3351\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emodule is vital for operators seeking to maximize plant availability and minimize costly unscheduled shutdowns caused by sensor signal discrepancies or module faults.\u003c\/p\u003e\n\u003ch3\u003eAdvanced TMR Hardware Architecture\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3351\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emodule leverages the patented\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTriconex\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTMR architecture to deliver unparalleled reliability. Each of the 32 input points is commoned and processed through three independent legs.\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTriple Redundancy:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEvery analog signal is branched to three separate input legs (Leg A, B, and C). Each leg performs independent signal conditioning and analog-to-digital conversion.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInternal Voting Logic:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe converted digital values are compared and voted upon by the Main Processors. This process transparently filters out transient noise and hardware intermittent faults.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDiagnostic Precision:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module executes continuous self-diagnostics to detect \"stuck-on\" conditions or calibration drifts. If one leg deviates beyond a programmed threshold, the system flags a fault while continuing to operate safely in a dual-redundant mode.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInput Filtering:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWith a 16 Hz (3dB) input bandwidth, the module is optimized to reject high-frequency process noise while maintaining the responsiveness required for safety-critical loops.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification Details\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e3351\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTriconex\u003c\/strong\u003e (Schneider Electric)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAnalog Input (TMR)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNominal Input Current\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4–20 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNumber of Points\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e32, Commoned\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperational Range\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2–22 mA DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Bandwidth\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e16 Hz (3dB)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSource Impedance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e180 ohms\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 60 deg C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.5 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eShipping Weight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3.0 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eRelative Humidity\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5 to 95 percent (Non-condensing)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTechnical FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the 3351 handle \"Out of Range\" signals?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3351\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erecognizes signals between 2 mA and 22 mA. Any signal falling below 2 mA is typically treated as a \"Bad Sensor\" or open circuit, while signals above 22 mA indicate a short circuit or transducer failure, triggering an immediate system alarm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the 3351 be replaced while the system is online?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTriconex 3351\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esupports Hot-Swap functionality. When inserted into a spare slot or replacing a faulted unit, the module automatically undergoes a self-test and synchronizes its data with the active Main Processors without interrupting the process.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the significance of the \"Commoned\" architecture in this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 32 points are commoned to simplify wiring in high-density applications. It is essential to ensure that the field loop power supply is compatible with this common-return configuration to prevent ground loops.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Engineering \u0026amp; Installation Guide\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eShielding and Grounding:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFor\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e4–20 mA\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eloops, use high-quality twisted-pair shielded cabling. Connect the shield at the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTriconex\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003etermination panel ground bar only. Do not ground the shield at the field transmitter end to avoid circulating ground currents that can introduce errors into the 16 Hz bandwidth.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eImpedance Matching:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3351\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ehas an internal source impedance of\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e180 ohms\u003c\/strong\u003e. Ensure that your field transmitters have sufficient driving voltage (typically 24 VDC) to overcome the combined loop resistance of the module and the field wiring.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHeat Dissipation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIn cabinets with multiple high-density\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3351\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emodules, ensure a minimum of 5 cm of clear air space between the chassis and cabinet doors. Maintain an ambient environment below 60 deg C to prevent accelerated aging of the electrolytic capacitors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIndustrial Endurance Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEnvironmental Resilience:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3351\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis engineered to operate in harsh industrial atmospheres. The internal circuitry is treated to resist the effects of chemical corrosion and high humidity, typical of near-shore or tropical processing sites.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eVibration Tolerance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBuilt to meet stringent seismic and industrial vibration standards, the module's mechanical housing ensures that the connection to the backplane remains gas-tight even in the presence of heavy rotating machinery.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLegacy Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3351\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emaintains full compatibility with various versions of the Tricon chassis, allowing for seamless safety system expansions or the replacement of aging infrastructure without requiring a complete system overhaul.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"\"\u003e\u003c\/h3\u003e","brand":"Triconex","offers":[{"title":"Default Title","offer_id":53102422229355,"sku":"3351","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/3351-eetxdegkyo2.png?v=1776137099","url":"https:\/\/www.plcprotech.com\/fr\/products\/triconex-3351-analog-input-module-32-point-tmr-3351","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}