FI820F 3BDH000031R1 以太网交换机 用于构建可靠和高效的数据通信网络

FI820F 3BDH000031R1 以太网交换机 用于构建可靠和高效的数据通信网络

描述
如主箱体控制点数不符需要或功能不足，可再接扩展箱体。如接一个扩展箱体后，点数还不够，还可再接若干个扩展箱体。

模块式的PLC：它由具有不同功能的模块组成。其主要模块有，CPU模块、输入模块、输出模块、电源模块、通讯模块、机架…等等。大、中型机都是模块式的。

在结构上讲，由模块组合成系统有三种方法：

无底板，靠模块间接口直接相联，然后再固定到相应导轨上。OMRON公司的CQM1、CJ1机就是这种结构，比较紧凑。西门子的S7_300也如此，只是它还要接线插头，如要单独固定时，还得另定购固定支架。

有底板，所有模块都固定在底板上。比较牢固，但底板的槽数是固定的，如3、5、8、10槽等等。槽数与实际的模块数不一定相等，配置时难免有空槽。这既浪费，又多占空间，以至于有时还得用占空单元，把多余的槽覆盖好。

FI820F 3BDH000031R1 以太网交换机 用于构建可靠和高效的数据通信网络

Description
If the control points of the main box are not required or the function is insufficient, the expansion box can be connected. If the number of points is not enough after an expansion box, it can also be connected to several expansion boxes.

Modular PLC: It is composed of modules with different functions. Its main modules are CPU module, input module, output module, power module, communication module, rack... Let's wait. Both large and medium machines are modular.

Structurally speaking, there are three ways to combine modules into a system:

Without bottom plate, it is directly connected by the indirect port of the module, and then fixed to the corresponding guide rail. OMRON's CQM1, CJ1 machine is this structure, relatively compact. Siemens S7_300 is the same, but it also needs a connector, if you want to fix it separately, you have to order a fixed bracket.

There is a base plate on which all modules are fixed. Relatively firm, but the number of slots on the bottom plate is fixed, such as 3, 5, 8, 10 slots and so on. The number of slots may not be the same as the actual number of modules. Therefore, empty slots are unavoidable during configuration. This is both wasteful and takes up more space, so that sometimes it is necessary to cover the extra slots with empty units.

FI820F 3BDH000031R1 以太网交换机 用于构建可靠和高效的数据通信网络