PROSOFT 4301-MBP-DFCM 欧美备件 SIS系统 DCS模块

PROSOFT 4301-MBP-DFCM 欧美备件 SIS系统 DCS模块

PROFIBUS是过程现场总线的缩写，是自动化技术中领先的现场总线通信标准，支持使用单条总线电缆在网络内进行数字数据交换。目前，PROFIBUS有两种变体，最常用的是PROFIBUS DP(分散外设),用于通过集中控制器操作传感器和执行器。

PROFIBUS通常使用EIA-485传输技术作为其物理层。EIA-485基于带有一对阻抗为150欧姆的双绞线的屏蔽铜电缆，支持多达126个站连接到一个PROFIBUS DP网络，支持线性总线拓扑。

现场总线数据链路(FDL)协议定义了PROFIBUS数据链路层。通过令牌传递，FDL定义了网络访问，并区分了主站和从站。它还控制单个主机的时隙。

PROFIBUS, short for Process Fieldbus, is the leading fieldbus communication standard in automation technology that supports digital data exchange within a network using a single bus cable. Currently, there are two variants of PROFIBUS, the most commonly used being PROFIBUS DP(Decentralized peripherals) for operating sensors and actuators via a centralized controller.

PROFIBUS typically uses EIA-485 transport technology as its physical layer. EIA-485 is based on a shielded copper cable with a pair of 150 ohm impedance twisted pair and supports the connection of up to 126 stations to a PROFIBUS DP network, supporting a linear bus topology.

The Fieldbus Data Link (FDL) protocol defines the PROFIBUS data link layer. Through token passing, FDL defines network access and distinguishes between master and slave stations. It also controls the time slot of a single host.