PM891  COM4端口是隔离的，用于配置工具

Description

PM891  COM4端口是隔离的，用于配置工具

ABB AC800M系列 PM891 处理器

PM891处理器是一个单片单元，配有电源、CPU板和单元终端。PM891该单元包含微处理器和RAM存储器、实时时钟、LED指示灯、INIT按钮和安全数字接口。PM891不包含任何内部电池。PM891有两个用于连接控制网络的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冗余以获得更高的可用性（CPU、CEX总线、通信接口和S800 I/O）。

通信扩展总线（CEX总线）安装在装置上。CEX总线用于扩展带有通信接口单元的车载通信端口。可以在CEX总线上使用冗余通信接口。CEX总线互连单元BC810用于通过将其划分为单独的段来增加CEX总线上的可用性。该单元的光学模块可用于连接S800 I/O单元的七个集群（每个集群最多包括12个单元）。每个PM891都有一个唯一的以太网地址，为单元提供硬件标识。

PM891  COM4端口是隔离的，用于配置工具

ABB AC800M series PM891 processor

The PM891 processor is a single chip unit with a power supply, CPU board, and unit terminal. The PM891 unit contains a microprocessor and RAM memory, real-time clock, LED indicator, INIT button, and secure digital interface. The PM891 does not contain any internal batteries. The PM891 has two RJ45 Ethernet ports (CN1, CN2) and one RJ45 serial port (COM4) for connecting to the control network. The COM4 port is isolated and used for configuration tools. The PM891 supports CPU redundancy for higher availability (CPU, CEX bus, communication interface, and S800 I/O).

The Communication extension bus (CEX bus) is installed on the device. The CEX bus is used to extend vehicle communication ports with communication interface units. Redundant communication interfaces can be used on the CEX bus. The CEX bus interconnect unit BC810 is used to increase availability on the CEX bus by dividing it into separate segments. The unit’s optical module can be used to connect seven clusters of the S800 I/O unit (each cluster consists of up to 12 units). Each PM891 has a unique Ethernet address that provides a hardware identity for the unit.