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TRICONEX（現(xiàn)為施耐德電氣旗下安全品牌）的 AI3351 模擬輸入模塊電路板 是專為高可靠性、功能安全設(shè)計(jì)的核心組件，廣泛應(yīng)用于 三重化冗余（TMR）安全控制系統(tǒng) 中。

核心特性

三重化冗余架構(gòu)（TMR）

采用三個(gè)獨(dú)立通道同步采樣，通過 中值表決 或 三取二邏輯 確保單點(diǎn)故障不影響系統(tǒng)輸出，符合 IEC 61508 SIL 3 安全標(biāo)準(zhǔn)。

每個(gè)通道獨(dú)立處理信號(hào)，提供容錯(cuò)能力，避免誤動(dòng)作或拒動(dòng)。

高精度模擬信號(hào)處理

支持 4-20mA 電流信號(hào)或 0-10V 電壓信號(hào)輸入，適配工業(yè)傳感器（如溫度、壓力、液位傳感器）。

分辨率：16 位以上，精度：±0.02% 滿量程（典型值），確保測量可靠性。

快速響應(yīng)時(shí)間

信號(hào)轉(zhuǎn)換時(shí)間 ≤ 10ms，支持實(shí)時(shí)控制需求（如緊急停車系統(tǒng) ESD）。

集成診斷功能

實(shí)時(shí)監(jiān)測系統(tǒng)狀態(tài)（如輸入超范圍、斷線、電源故障），提供詳細(xì)故障日志。

支持 在線校驗(yàn)（如模擬輸入測試），減少停機(jī)維護(hù)時(shí)間。

環(huán)境適應(yīng)性

工作溫度范圍 -40°C 至 70°C，防護(hù)等級(jí) IP67（部分型號(hào)），適用于嚴(yán)苛工業(yè)環(huán)境。

典型應(yīng)用場景

石油化工：緊急停車系統(tǒng)（ESD）、火氣系統(tǒng)（FGS）。

電力能源：燃?xì)廨啓C(jī)保護(hù)、核電站安全監(jiān)控。

軌道交通：信號(hào)聯(lián)鎖、站臺(tái)安全門控制。

制藥與食品加工：滅菌設(shè)備安全保護(hù)、批次過程控制。

技術(shù)規(guī)格

輸入類型：4-20mA（隔離）、0-10V（非隔離）。

輸入阻抗：電流輸入 > 100kΩ，電壓輸入 > 1MΩ。

隔離電壓：通道間 1500V AC，對(duì)地 500V AC。

通信接口：支持 Triconex 總線（與控制器通信）。

供電：冗余 24V DC（部分型號(hào)支持 12V DC）。

系統(tǒng)兼容性

控制器平臺(tái)：與 Triconex 3008/3808 系列 TMR 控制器無縫集成。

配置工具：通過 Triconex Tristation 1131 軟件進(jìn)行組態(tài)、調(diào)試及仿真。

擴(kuò)展能力：支持級(jí)聯(lián)多個(gè) I/O 模塊，構(gòu)建分布式安全網(wǎng)絡(luò)。

用戶關(guān)注點(diǎn)

安全認(rèn)證：符合 IEC 61508 SIL 3、TüV AK6、ATEX 等標(biāo)準(zhǔn)，滿足合規(guī)要求。

維護(hù)便捷性：支持熱插拔，模塊化設(shè)計(jì)簡化故障更換。

生命周期管理：施耐德提供長期備件支持及技術(shù)升級(jí)路徑。

競爭優(yōu)勢

高可用性：TMR 架構(gòu)確保系統(tǒng)可用性 > 99.999%。

靈活性：支持定制化輸入范圍（如特殊傳感器信號(hào)）。

開放性：兼容主流工業(yè)協(xié)議（如 Modbus、HART），支持集成第三方設(shè)備。

The AI3351 analog input module circuit board of Triconex (now a safety brand under Schneider Electric) is a core component designed for high reliability and functional safety, widely used in triple redundancy (TMR) safety control systems.

core features

Triple Redundancy Architecture (TMR)

Three independent channels are used for synchronous sampling, and median voting or two out of three logic is used to ensure that a single point fault does not affect the system output, in compliance with the IEC 61508 SIL 3 safety standard.

Each channel independently processes signals, providing fault tolerance to avoid misoperation or refusal to operate.

High precision analog signal processing

Supports 4-20mA current signal or 0-10V voltage signal input, suitable for industrial sensors such as temperature, pressure, and liquid level sensors.

Resolution: 16 bits or more, accuracy: ± 0.02% of full scale (typical value), ensuring measurement reliability.

fast response time

Signal conversion time ≤ 10ms, supporting real-time control requirements (such as emergency shutdown system ESD).

Integrated diagnostic function

Real time monitoring of system status (such as input out of range, disconnection, power failure), providing detailed fault logs.

Support online verification (such as analog input testing) to reduce downtime for maintenance.

Environmental adaptability

The working temperature range is -40 ° C to 70 ° C, with a protection level of IP67 (some models), suitable for harsh industrial environments.

Typical application scenarios

Petrochemical industry: Emergency Shutdown System (ESD), Fire and Gas System (FGS).

Electric energy: gas turbine protection, nuclear power plant safety monitoring.

Rail transit: signal interlocking, platform safety door control.

Pharmaceutical and food processing: sterilization equipment safety protection, batch process control.

technical specifications

Input type: 4-20mA (isolated), 0-10V (non isolated).

Input impedance: current input>100k Ω, voltage input>1M Ω.

Isolation voltage: 1500V AC between channels and 500V AC to ground.

Communication interface: Supports Triconex bus (for communication with controllers).

Power supply: Redundant 24V DC (some models support 12V DC).

system compatibility

Controller platform: seamlessly integrated with Triconex 3008/3808 series TMR controllers.

Configuration tool: Use Triconex Tristation 1131 software for configuration, debugging, and simulation.

Scalability: Supports cascading multiple I/O modules to build a distributed secure network.

User Focus Points

Safety certification: Compliant with IEC 61508 SIL 3, T ü V AK6, ATEX and other standards, meeting compliance requirements.

Maintenance convenience: Supports hot swapping, modular design simplifies fault replacement.

Lifecycle management: Schneider provides long-term spare parts support and technology upgrade paths.

competitive edge

High availability: TMR architecture ensures system availability>99.999%.

Flexibility: Supports customized input range (such as special sensor signals).

Openness: Compatible with mainstream industrial protocols such as Modbus and HART, and supports integration with third-party devices.