{"product_id":"triconex-3805h-analog-output-module-8-point-tmr-3805h","title":"Module de sortie analogique 8 points TMR (3805H) Triconex 3805H","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e3805H (3805H)\u003c\/strong\u003e is a high-availability Triple Modular Redundant (TMR) Analog Output Module engineered for the \u003cstrong\u003eTriconex\u003c\/strong\u003e safety-instrumented system. This 8-point module provides precise \u003cstrong\u003e4-20 mA\u003c\/strong\u003e control signals for critical final control elements such as governor valves, dampers, and variable speed drives. Primarily deployed in the hydrocarbon processing, power generation, and specialized mining industries, the \u003cstrong\u003eTriconex 3805H\u003c\/strong\u003e utilizes a 2-out-of-3 (2oo3) hardware voting architecture to ensure that no single point of failure can lead to an unsafe process state or an unwanted shutdown. By delivering high-accuracy loop control even during internal hardware discrepancies, the \u003cstrong\u003e3805H\u003c\/strong\u003e is a fundamental component in reducing Mean Time To Repair (MTTR) and maximizing overall plant production efficiency.\u003c\/p\u003e\n\u003ch3\u003eAdvanced TMR Control Architecture\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e3805H\u003c\/strong\u003e operates through a sophisticated hardware-implemented fault tolerance (HIFT) strategy that sets it apart from standard industrial controllers.\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTriple Redundant Output Path:\u003c\/strong\u003e Each of the 8 output channels is driven by three independent sub-circuits (Leg A, B, and C). The three signals are voted upon at the hardware level within the module before being sent to the field terminal.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e12-bit Resolution Accuracy:\u003c\/strong\u003e The module features a high-performance DAC system providing \u003cstrong\u003e12 bits\u003c\/strong\u003e of resolution, ensuring smooth and granular control of proportional valves and actuators.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eContinuous Loop Monitoring:\u003c\/strong\u003e The \u003cstrong\u003e3805H\u003c\/strong\u003e performs \"loop-back\" checks, where each leg monitors the actual current flowing in the output loop. If one leg detects a deviation from the commanded value, the system flags a fault while the remaining two legs maintain precise control.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDC Coupled Current Loop:\u003c\/strong\u003e The DC coupled design ensures high signal integrity and rapid response times, essential for high-speed surge control or turbine governor applications.\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\u003e3805H\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\u003eOrigin\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUSA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAnalog Output (TMR)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Range\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4-20 mA (Up to 21.2 mA overrange)\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\u003e8 Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e12 bits\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Accuracy\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u0026lt; 0.25 percent of FSR\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 60 deg C (32 to 140 deg F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModule Weight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.2 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\u003ePower Consumption\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u0026lt; 20 W\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 3805H maintain control if one internal leg fails?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module uses a patented voting mechanism. If one of the three internal legs fails, the hardware voter automatically ignores the faulted leg and continues to drive the \u003cstrong\u003e4-20 mA\u003c\/strong\u003e signal based on the remaining two healthy legs. This happens instantaneously without process interruption.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the significance of the 6 percent overrange capability?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e3805H\u003c\/strong\u003e can drive signals up to 21.2 mA. This allows for specialized valve positioning and diagnostics where the controller needs to push the actuator slightly beyond the standard \u003cstrong\u003e20 mA\u003c\/strong\u003e limit for full-stroke verification or clearing sticktion.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 3805H compatible with HART communication?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStandard \u003cstrong\u003e3805H\u003c\/strong\u003e modules focus on high-speed TMR safety control. If HART pass-through is required for asset management, ensure you are utilizing the correct External Termination Panel (ETP) and that the system firmware supports HART multiplexing.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eEngineering \u0026amp; Installation Guide\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLoop Resistance Management:\u003c\/strong\u003e Ensure the total loop resistance (including field wiring and the actuator impedance) does not exceed the module's driving capability. A typical limit for the \u003cstrong\u003e3805H\u003c\/strong\u003e is 600 ohms at 20 mA. Exceeding this can cause the module to report a \"Field Loop Fault\" despite healthy internal hardware.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eShielding and Grounding:\u003c\/strong\u003e Use high-quality shielded twisted-pair cables. Ground the shield at the \u003cstrong\u003eTriconex\u003c\/strong\u003e chassis end only. This prevents ground loops from interfering with the \u003cstrong\u003e12-bit\u003c\/strong\u003e resolution and maintains the specified accuracy of \u003cstrong\u003e\u0026lt; 0.25 percent\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThermal Consideration:\u003c\/strong\u003e In high-density cabinets, maintain vertical airflow. While the \u003cstrong\u003e3805H\u003c\/strong\u003e is rated for \u003cstrong\u003e0 to 60 deg C\u003c\/strong\u003e, prolonged operation at the upper thermal limit can reduce the lifespan of the output capacitors. Ensure cabinet fan trays are monitored.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOperational Durability \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eExtreme Environment Performance:\u003c\/strong\u003e The \u003cstrong\u003e3805H\u003c\/strong\u003e is built to withstand the rigorous vibration and thermal cycling common in turbine halls and offshore platforms. The internal PCB is treated to resist corrosion in high-humidity atmospheres.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBackward Compatibility:\u003c\/strong\u003e This module is designed to integrate seamlessly with various versions of the Tricon chassis (v9 and v10), allowing for phased upgrades of aging safety systems without the need for a total infrastructure overhaul.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRedundant Power Feed:\u003c\/strong\u003e The module draws power from dual-redundant power rails on the backplane, ensuring that a single power supply failure within the chassis will not result in a loss of analog output control.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Triconex","offers":[{"title":"Default Title","offer_id":53102421737835,"sku":"3805H","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/3805H-yqfpn2z0pq5.png?v=1776137115","url":"https:\/\/www.plcprotech.com\/fr\/products\/triconex-3805h-analog-output-module-8-point-tmr-3805h","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}