135489-03 I/O 模块 能够控制变量的数目

135489-03 I/O模块，即输入输出模块，是分布式I/O系统中的必备组件。它可分为离散、模拟和特殊模块等多种类型，并且可以安装在带有多个插槽的导轨或机架上。每个模块插入其中一个插槽，而插槽的数目可以是4、8、12等不等。在一般情况下，电源模块会插在第一插槽内，编号为0，PLC插在第二插槽内，各种类型的输入输出模块插在其余插槽内。I/O模块导轨的背面会安装带有连接器的印制电路板，这样可以将插入I/O模块的各插槽连接起来，使插入的模块排成一条直线。此外，根据安装位置和功能的不同，I/O模块导轨还可以分为本地I/O导轨和远程I/O导轨。本地I/O导轨只包含I/O模块和处理器，而远程I/O导轨则包含I/O模块、电源、远程I/O通信卡，并且安装在远离本地I/O导轨的位置。

135489-03

远程I/O导轨的数目取决于不同处理器能够控制变量的数目。另外，I/O模块还需要与合适的耦合器（例如BL200系列）组合，才能将现场设备或过程连接起来，实现对现场数据采集、监视和控制。在这个过程中，需要使用电源模块提供24VDC系统电压和24VDC现场电压，而现场总线耦合器本身则包含一个电源模块。由于使用了两组独立的电源，因此现场电压和系统电压彼此电气隔离。总的来说，135489-03 I/O模块是工业控制系统中的重要组成部分，负责实现与外部设备的通信和数据交换。不同类型的I/O模块具有不同的功能和特点，需要根据具体的应用场景和需求进行选择和使用。

135489-03

135489-03 I/O module, also known as input/output module, is an essential component in distributed I/O systems. It can be divided into various types such as discrete, analog, and special modules, and can be installed on rails or racks with multiple slots. Each module is inserted into one of the slots, and the number of slots can vary from 4, 8, 12, etc. In general, the power module is inserted into the first slot, numbered 0, the PLC is inserted into the second slot, and various types of input and output modules are inserted into the remaining slots. A printed circuit board with connectors will be installed on the back of the I/O module rail, which can connect the slots where I/O modules are inserted and align the inserted modules in a straight line. In addition, according to the different installation locations and functions, the I/O module rails can also be divided into local I/O rails and remote I/O rails. The local I/O rail only contains the I/O module and processor, while the remote I/O rail includes the I/O module, power supply, remote I/O communication card, and is installed far away from the local I/O rail.

135489-03

The number of remote I/O rails depends on the number of variables that different processors can control. In addition, I/O modules also need to be combined with suitable couplers (such as the BL200 series) to connect field devices or processes, achieving data collection, monitoring, and control on site. In this process, a power module is required to provide 24VDC system voltage and 24VDC field voltage, and the fieldbus coupler itself includes a power module. Due to the use of two independent power sources, the on-site voltage and system voltage are electrically isolated from each other. Overall, the 135489-03 I/O module is an important component of industrial control systems, responsible for achieving communication and data exchange with external devices. Different types of I/O modules have different functions and characteristics, and need to be selected and used according to specific application scenarios and requirements.