1、空开：一个总的空气开关，这个是整个柜体的电源控制。相信每个柜子都必须要有的一个东西。 　　

Open: a total air switch. This is the power supply control of the whole cabinet. Believe that every cabinet must have something. 

2、PLC：这个要根据工程需要选择。打个比方如果工程小可以直接就是一个一体化的PLC 但如果工程比较大 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）。 　　

PLC: this depends on the project. For example if small engineering can be directly but if the project is an integrated PLC is larger May need module, card type, also may need to be redundant (that is, two sets of used interchangeably). 

3、24VDC的电源：一个24VDC的开关电源，大多数的PLC都是自带24VDC的电源，根据是否确实需要来定是否要这个开关电源。 　　

Power of 24VDC: a 24VDC switching power source, and most of the PLC is powered by a 24VDC, depending on whether or not it is necessary to make the switch. 

4、继电器：一般PLC是可以直接将指令发到控制回路里，但也可能先由继电器中转。打个比方，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，但后让控制回路的节点接到继电器的常开或常闭点上。也是根据情况选择是否使用继电器。 　　

Relays: the general PLC is able to send instructions directly to the control circuit, but it may also be relayed by a relay. PLC, for example, if you are charged the output is 24 VDC, but a picture of your control circuit diagram of PLC is needed for the node is 220 vac, so you must add a relay, PLC output when the instruction Relay action, but the control circuit of nodes after received normally open or normally closed relay point. It is also based on the situation where the relay is used. 

5、接线端子：这个肯定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东西 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。

Terminal 2: this must be an essential item for every cabinet that can be configured according to the number of signals. If it's just a simple PLC control cabinet basically you need these things, and if you have something else in your control cabinet it's going to add up. For example, you may have to power a certain field instrument or small control box, and you may have to increase the number of empty units. Or if you want to connect to the top machine, you may need to add a switch or something. It depends. 

　　PLC控制柜可完成设备自动化和过程自动化控制，实现完美的网络功能，性能稳定、可扩展、抗干扰强等特点，是现代工业的核心和灵魂。可以根据用户需求量身设计PLC控制柜、变频柜等，满足用户要求，并可搭配人机界面触摸屏，达到轻松操作的目的。设备更可与dcs总线上位机 modbus、profibus等通讯协议的数据传输；工控机、以太网等实现的控制和监控。

PLC controller can complete equipment automation and process automation control, perfect network function, stable performance, extensible, strong anti-interference characteristics, is the core and soul of modern industry. According to the user's requirements, the PLC control cabinet, the frequency conversion cabinet, etc., can meet the user's requirements, and can be used with the touch screen of man-machine interface to achieve the goal of easy operation. Devices are more likely to transmit data from communications protocols such as modbus, profibus, and the DCS bus. Control and monitoring of actuator, Ethernet, etc.