HN800+VBX01B ABB 总线拓展控制器是 ABB 提供的一种用于工业控制系统的设备。根据搜索结果，以下是一些关于 VBX01B ABB 总线拓展控制器的关键信息：

型号：VBX01BA，这是 ABB 控制系统附件的型号之一。

品牌：ABB，一个知名的工业自动化和控制系统制造商。

产品尺寸：产品净深/长度为 180 毫米，产品净高为 80 毫米，产品净宽为 160 毫米。

产品描述：HN800/CW800 总线扩展器，垂直柱，连接到 HN800 设备柱的底部并带有保形涂层。

功能：总线扩展器是定制的 RS485 总线代理，与市面上常见的 RS485 集线器不同，它采用 4 物理串口 CPU，通过软件实现不同串口之间的数据交换。

应用场景：在实际工程中，经常会遇到多个设备同时读写一个 485 端口的情况，例如多个电脑需要同时抄同一电表，或者本地 PLC 和远程电脑需要同时采集 CTU 数据。VBX01BA 总线扩展器能够自动按访问顺序排队，将结果反馈给请求端口，解决多个设备访问同一 485 口产生的端口冲突问题。

The HN800+VBX01B ABB Bus Expansion Controller is a device supplied by ABB for industrial control systems. Based on the search results, here are some key information about the VBX01B ABB Bus expansion controller:

Model: VBX01BA, this is one of the models of ABB control system accessories.

Brand: ABB, a well-known manufacturer of industrial automation and control systems.

Product size: the net depth/length of the product is 180 mm, the net height of the product is 80 mm, the net width of the product is 160 mm.

Description: HN800/CW800 bus expander, vertical column, attached to the bottom of the HN800 device column and with conformal coating.

Function: Bus extender is a customized RS485 bus agent, and the market common RS485 hub is different, it uses 4 physical serial port CPU, through the software to achieve data exchange between different serial ports.

Application scenario: In practical engineering, it is often encountered that multiple devices read and write a 485 port at the same time, such as multiple computers need to read the same electricity meter at the same time, or local PLC and remote computer need to collect CTU data at the same time. VBX01BA bus extender can automatically queue in order of access and feedback the result to the request port to solve the problem of port conflict caused by multiple devices accessing the same 485 port.