>>>>>型号:PM891 单片单元 可靠性和简单的故障诊断程序
【功能描述】
PM891处理器是一个单片单元，配备电源、CPU板和单元终端。该装置包含微处理器和RAM存储器、实时时钟、LED指示灯、INIT按钮和安全数字接口。PM891不包含任何内置电池PM891有两个用于连接到控制网络的RJ45以太网端口（CN1、CN2）和一个RJ45串行端口（COM4）。COM4端口是隔离的，用于配置工具。PM891支持CPU冗余以实现更高的可用性（CPU、CEX总线、通信接口和S800 I/O）。
通信扩展总线（CEX-Bus）安装在本机上。CEX-Bus用于扩展带有通信接口单元的板载通信端口。可以在CEX-Bus上使用冗余通信接口。CEX-Bus互连单元BC810用于通过将CEX-Bus划分为单独的段来提高其可用性。该单元的光学模块总线可用于连接七个S800 I/O单元集群（每个集群最多包含12个单元）。每个PM891都提供唯一的以太网地址，为设备提供硬件标识。
特点和优势
可靠性和简单的故障诊断程序
模块化，允许逐步扩展
IP20防护等级，无需外壳
控制器具有完整的EMC认证
高性能和大容量应用程序内存
使用一对BC810的分段式CEX总线
内置冗余以太网通信端口
>>>>>型号:PM891 单片单元 可靠性和简单的故障诊断程序
【英文介绍】
ABB PM866K01 3BSE050198R1 controller unit
Features and advantages
ISA Security Certification - Learn more
Reliable and simple troubleshooting program
Modular, allowing for gradual expansion
IP20 protection, no case required
The controller can be configured with the 800xA control builder
The controller is fully certified by EMC
The cex bus uses a pair of BC810 and BC820
Hardware based on the best communication connectivity standards (Ethernet, PROFIBUS DP, etc.)
Built-in redundant Ethernet communication port
The Control Unit is responsible for the flow management of the program. Just like the logistics distribution department in a factory, the control unit is the command and control center of the entire CPU, It is composed of three parts: Instruction Register IR(Instruction Register), instruction Decoder ID(Instruction Decoder) and Operation Controller OC(Operation Controller), which is extremely important to coordinate the orderly work of the whole computer. The control unit can be part of the CPU or installed outside the CPU
>>>>>型号:PM891 单片单元 可靠性和简单的故障诊断程序
