ABB PM891 处理器模块是一个单片单元，配备电源、CPU 板和单元端接。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PU、CEX 总线、通信接口和 S800 I/O。通信扩展总线 CEX-Bus 安装在设备上。CEX 总线用于扩展具有通信接口单元的板载通信端口。ABB PM891 处理器模块可以在 CEX 总线上使用冗余通信接口。
PM891
CEX 总线互连单元 BC810 用于通过将 CEX 总线划分为单独的段来提高 CEX 总线的可用性。该单元的光模块总线可用于连接七个S800 I/O单元集群每个单元最多包含12个单元。每个 PM891 都提供一个唯一的以太网地址，为设备提供硬件标识。ABB PM891 处理器模块特性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 级防护等级，无需外壳控制器具有完整的EMC认证高性能和大应用程序内存使用一对BC810分段的CEX总线内置冗余以太网通信端口。
PM891
The ABB PM891 processor module is a single-chip unit equipped with a power supply, CPU board, and unit termination. The device includes a microprocessor and RAM memory, real-time clock, LED indicator light, INIT button, and secure digital interface. PM891 does not contain any built-in batteries. 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. PM891 supports CPU redundancy for higher availability PU, CEX bus, communication interface, and S800 I/O. The communication expansion bus CEX-Bus is installed on the device. The CEX bus is used to expand onboard communication ports with communication interface units. The ABB PM891 processor module can use redundant communication interfaces on the CEX bus.
PM891
The CEX bus interconnect unit BC810 is used to improve the availability of the CEX bus by dividing it into separate segments. The optical module bus of this unit can be used to connect seven S800 I/O unit clusters, with each unit containing up to 12 units. Each PM891 provides a unique Ethernet address to provide hardware identification for the device. ABB PM891 processor module features and advantages, reliability, and simple fault diagnosis program modularization, allowing for gradual expansion of IP20 level protection level, without the need for a shell controller with complete EMC certification, high performance, and large application memory using a pair of BC810 segmented CEX buses with built-in redundant Ethernet communication ports.
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