01

01

空开

Open space

一个总的空气开关，这是整个柜体的电源控制，是每个柜子都必须要有的东西。

A total air switch, which is the power control of the whole cabinet, is what each cabinet must have.

02

02

PLC

PLC

这个要根据工程需要选择。如果工程小，可以直接用一个一体化的PLC；如果工程比较大，可能就需要模块、卡件式的，同时还可能需要冗余（也就是两套交替使用）。

This project should be selected according to the needs of the project. If the project is small, you can directly use an integrated PLC; if the project is relatively large, you may need the module, card type, and may also need redundancy (that is, two sets of alternate use).

03

03

24VDC的电源

The power supply of 24VDC

一个24VDC的开关电源，大多数的PLC都是自带24VDC的电源，需要根据实际情况来定是否要这个开关电源。

A 24VDC switching power supply, most of the PLC are 24VDC power supply, it is necessary to determine whether the switch power supply according to the actual situation.

04

04

继电器

Relay

一般PLC是可以直接将指令发到控制回路里的，但也可能先由继电器中转。如果你PLC的输出口带电是24VDC的，但是你的控制回路里画的图需要PLC供的节点却是220VAC的，那么你就必须在PLC输出口加上一个继电器，即指令发出时继电器动作，让控制回路的节点接到继电器的常开或常闭点上。这也是根据情况选择是否使用继电器。

The general PLC can send instructions directly to the control loop, but it may also be transferred by relay. If the output of your PLC 24VDC is charged, but the control loop in your drawing to PLC for the node is 220VAC, then you must add a relay in the PLC output port, the command is issued to relay node control circuit to relay normally closed or open. On. This is also based on the choice of whether to use the relay.

05

05

接线端子

Connection terminal

接线端子是每个柜子都必不可少的东西，根据信号数量可以配置。如果只是一个单纯的PLC控制柜，基本就是需要这些玩意，如果你的控制柜内还需要有其他的设备，就看情况增加。比方说你有可能要对某些现场的仪表或者小控制箱供电，可能你就得要增加空开数量。或者你要PLC接至上位机，可能就需要增加交换机什么的。视情况而定。

Terminals are essential to each cabinet, can be configured according to the number of signals. If only a simple PLC control cabinet, basically need these things, if your control cabinet also need to have other equipment, see the situation increases. For example, you may have to live on some instruments or small power supply control box, then you may need to increase the number of open space. Or you want PLC to connect to the upper computer, you may need to increase the switch what. It all depends.