RV33-1 GE 控制器主板 处理器系统 PLC模块 美国通用电气

RV33-1 GE 控制器主板 处理器系统 PLC模块 美国通用电气

所谓主板结构就是根据主板上各元器件的布局排列方式，尺寸大小，形状，所使用的电源规格等制定出的通用标准，所有主板厂商都必须遵循。

主板结构分为AT、Baby-AT、ATX、Micro ATX、LPX、NLX、Flex ATX、E-ATX、WATX以及BTX等结构。其中，AT和Baby-AT是多年前的老主板结构，已经淘汰；

而LPX、NLX、Flex ATX则是ATX的变种，多见于国外的品牌机，国内尚不多见；E-ATX和W-ATX则多用于服务器/工作站主板；ATX是市场上最常见的主板结构，扩展插槽较多，PCI插槽数量在4-6个，大多数主板都采用此结构；

Micro ATX又称Mini ATX，是ATX结构的简化版，就是常说的“小板”，扩展插槽较少，PCI插槽数量在3个或3个以下，多用于品牌机并配备小型机箱；而BTX则是英特尔制定的最新一代主板结构，但尚未流行便被放弃，继续使用ATX。

The so-called motherboard structure is based on the layout of the components on the motherboard, size, shape, the use of power specifications and other common standards, all motherboard manufacturers must follow.

The motherboard structure is divided into AT, Baby-AT, ATX, Micro ATX, LPX, NLX, Flex ATX, E-ATX, WATX and BTX and other structures. Among them, AT and Baby-AT are old motherboard structures from many years ago and have been eliminated;

LPX, NLX, Flex ATX is a variant of ATX, more common in foreign brand machines, domestic is still rare; E-ATX and W-ATX are mostly used for server/workstation motherboards. ATX is the most common motherboard structure on the market, there are more expansion slots, the number of PCI slots in 4-6, most motherboards use this structure;

Micro ATX, also known as Mini ATX, is a simplified version of the ATX structure, which is often referred to as the "small board", with fewer expansion slots, the number of PCI slots is 3 or less, and it is mostly used for brand machines and equipped with small chassis; BTX is the latest generation of motherboard structure developed by Intel, but it has not yet been popular and was abandoned, continuing to use ATX.