TRICONEX A03481S2，也常标注为AO3481S2，是Tricon安全系统4通道TMR三冗余模拟量输出模块，标准4-20mA源型电流输出，共回流接线方式，适配Tricon CX/EX/RX机架。

TRICONEX A03481S2, also named AO3481S2, is a 4-channel TMR analog output module for Tricon SIS with 4-20mA sourcing current and common return wiring, compatible with Tricon CX/EX/RX racks.

模块采用三取二中值选择表决算法，自带强制切换诊断与回路回读校验，SIL3安全等级，支持热插拔，用于驱动调节阀、I/P转换器、透平调速执行器，是SIS连续调节回路核心备件。

It adopts median selection voting logic with forced-switch diagnostics and loop readback verification, SIL3 certified and hot-swappable, to drive control valves, I/P converters and turbine governors for SIS modulating safety loops.

Main Specifications 技术参数

• 1. Product Series / 产品系列：TRICONEX Tricon SIS Safety System

• 2. Part Numbers / 型号编码：A03481S2, AO3481S2, 3481S2

• 3. Function Type / 类型：4-Point TMR 4-20mA Analog Output Module 三冗余AO卡

• 4. Key Features / 特性：TMR median voting, 4-20mA sourcing, loop readback, SIL3, hot-swap, TriBus

• 5. Compatibility / 配套：Tricon CX/EX/RX机架、外部端子板、TriStation 1131组态软件

Core Functions 核心功能

• 1. 输出4-20mA标准调节电流信号，精准控制调节阀开度、执行机构行程。
  Output standard 4-20mA current signals to precisely adjust control valve position and actuator stroke.

• 2. 三路独立运算、中值表决输出，单通道故障不会造成输出跳变、误动作。
  Three independent slices with median voting, single channel fault will not cause output jump or spurious action.

• 3. 回路回读与强制自检，实时检测断线、短路、输出漂移，上传诊断信息。
  Loop readback and forced diagnostics detect wire break, short circuit and drift, and report fault status.

• 4. 背板总线供电，单槽位安装，支持不停机热插拔维护，降低工艺停车风险。
  Backplane powered, single slot design, hot-swappable for maintenance without plant shutdown.

• 5. 通过TriBus接收主CPU给定值，配合SOE记录调节动作时序，便于事故追溯。
  Receive setpoint from main CPU via TriBus and support SOE logging for event sequence analysis.

Application Scenarios 应用场景

• 1. 炼油、天然气厂SIS系统燃料气调节阀、压力控制调节阀安全调节回路。
  Safety modulating loops for fuel gas valves and pressure control valves in refineries and gas plants.

• 2. 电厂透平、锅炉SIS调速系统，驱动I/P转换器与汽轮机执行机构。
  Turbine and boiler SIS speed control loops to drive I/P converters and turbine actuators in power plants.

• 3. 化工装置反应器温度、压力安全调节回路，故障状态下安全置位阀门。
  Reactor temperature and pressure safety control loops with safe valve positioning on fault conditions.

• 4. 海外存量Tricon安全系统AO卡故障替换、调节回路备件备货项目。
  Spare replacement and stocking for failed AO modules on legacy Tricon SIS installed overseas.

• 5. 煤化工、空分装置SIS技改，新增连续模拟量调节控制点位。
  SIS retrofit projects for coal chemical and air separation plants to add analog modulating control points.

FAQ 常见问答

Similar Models 相似型号

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3700A

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