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ABB AC800M 系列中的 PM891AK02 冗余控制器單元 是專為工業(yè)自動(dòng)化設(shè)計(jì)的核心控制設(shè)備，屬于瑞典 ABB 公司推出的 分布式控制系統(tǒng)（DCS） 解決方案的一部分。

核心特性

冗余設(shè)計(jì)

采用雙機(jī)熱備（Redundant Configuration），主備控制器實(shí)時(shí)同步數(shù)據(jù)，確保單點(diǎn)故障時(shí)系統(tǒng)無(wú)擾動(dòng)切換（切換時(shí)間通常 < 50ms），滿足高可用性需求。

支持冗余電源、冗余通信模塊，全面提升系統(tǒng)可靠性。

高性能計(jì)算能力

基于高性能處理器，支持復(fù)雜控制算法（如先進(jìn)控制、批量控制、邏輯運(yùn)算等）。

適用于大規(guī)模 I/O 點(diǎn)數(shù)及高速數(shù)據(jù)采集場(chǎng)景。

模塊化擴(kuò)展

支持通過(guò)背板總線擴(kuò)展 I/O 模塊、通信模塊（如以太網(wǎng)、Profibus、Modbus 等），靈活適配不同工藝需求。

集成性與兼容性

深度集成 ABB 的 System 800xA 控制平臺(tái)，支持統(tǒng)一工程環(huán)境（如控制策略組態(tài)、HMI 設(shè)計(jì)）。

兼容 IEC 61131-3 標(biāo)準(zhǔn)，支持多種編程語(yǔ)言（梯形圖、功能塊圖、結(jié)構(gòu)化文本等）。

行業(yè)認(rèn)證

通過(guò) SIL 2/3 安全認(rèn)證，適用于關(guān)鍵工藝段的冗余控制。

符合嚴(yán)苛的工業(yè)環(huán)境標(biāo)準(zhǔn)（如溫度、電磁干擾防護(hù)）。

典型應(yīng)用場(chǎng)景

電力行業(yè)：燃?xì)廨啓C(jī)、蒸汽輪機(jī)控制，電網(wǎng)穩(wěn)定控制。

石油化工：連續(xù)生產(chǎn)過(guò)程控制，安全聯(lián)鎖系統(tǒng)（SIS）。

水處理與環(huán)保：污水處理廠、廢氣排放監(jiān)控系統(tǒng)。

制藥與食品飲料：批次生產(chǎn)過(guò)程控制，符合 FDA 21 CFR Part 11 規(guī)范。

技術(shù)規(guī)格（示例）

處理器：多核 CPU，支持多任務(wù)實(shí)時(shí)操作系統(tǒng)。

內(nèi)存：大容量 RAM + Flash 存儲(chǔ)，支持控制程序與數(shù)據(jù)長(zhǎng)期保存。

通信接口：冗余以太網(wǎng)、Profibus DP、Modbus TCP/IP 等。

I/O 容量：可擴(kuò)展至數(shù)千點(diǎn)，支持模擬量、數(shù)字量、脈沖量輸入/輸出。

工作環(huán)境：溫度范圍 -20°C 至 60°C，抗振動(dòng)/沖擊設(shè)計(jì)。

冗余機(jī)制

同步機(jī)制：主備控制器通過(guò)高速總線（如光纖）實(shí)時(shí)同步數(shù)據(jù)，確保狀態(tài)一致。

故障檢測(cè)：硬件自檢、看門狗定時(shí)器、通信鏈路監(jiān)控。

無(wú)擾切換：故障時(shí)備用控制器立即接管，控制輸出保持連續(xù)，避免工藝波動(dòng)。

The PM891AK02 redundant controller unit in the ABB AC800M series is a core control equipment designed specifically for industrial automation, and is part of the distributed control system (DCS) solution launched by ABB in Sweden.

core features

Redundant design

Adopting a dual machine hot standby configuration, the primary and backup controllers synchronize data in real-time to ensure uninterrupted system switching in the event of a single point of failure (switching time is usually less than 50ms), meeting high availability requirements.

Supporting redundant power supplies and communication modules to comprehensively enhance system reliability.

High performance computing capability

Based on high-performance processors, it supports complex control algorithms such as advanced control, batch control, logical operations, etc.

Suitable for large-scale I/O points and high-speed data acquisition scenarios.

Modular expansion

Support the expansion of I/O modules and communication modules (such as Ethernet, Profibus, Modbus, etc.) through backplane bus, flexibly adapting to different process requirements.

Integration and compatibility

Deeply integrated with ABB's System 800xA control platform, supporting unified engineering environments such as control strategy configuration and HMI design.

Compatible with IEC 61131-3 standard, supporting multiple programming languages such as ladder diagrams, functional block diagrams, structured text, etc.

Industry certification

Through SIL 2/3 safety certification, it is suitable for redundant control in critical process sections.

Compliant with stringent industrial environmental standards such as temperature and electromagnetic interference protection.

Typical application scenarios

Power industry: gas turbine, steam turbine control, grid stability control.

Petrochemical industry: continuous production process control, safety interlock system (SIS).

Water treatment and environmental protection: sewage treatment plants, exhaust gas emission monitoring systems.

Pharmaceutical and Food Beverage: Batch production process control, in compliance with FDA 21 CFR Part 11 specifications.

Technical specifications (example)

Processor: Multi core CPU, supporting multitasking real-time operating systems.

Memory: Large capacity RAM+Flash storage, supporting long-term storage of control programs and data.

Communication interfaces: redundant Ethernet, Profibus DP, Modbus TCP/IP, etc.

I/O capacity: expandable to thousands of points, supporting analog, digital, and pulse input/output.

Working environment: Temperature range -20 ° C to 60 ° C, anti vibration/impact design.

Redundancy Mechanism

Synchronization mechanism: The primary and backup controllers synchronize data in real-time through high-speed buses (such as optical fibers) to ensure consistent status.

Fault detection: hardware self-test, watchdog timer, communication link monitoring.

Disturbance free switching: In case of a fault, the backup controller immediately takes over, and the control output remains continuous to avoid process fluctuations.