1756-A7 7槽ControlLogix机架

Description

1756-A7 7槽ControlLogix机架

1756-A7是来自于ControlLogix可编程自动化控制器（PAC）平台的七（7）插槽机箱。这款机箱是开放式设备，没有用于保护的外壳，其设计特点主要体现在其顶部和底部都只有2个安装卡舌，这使得它在安装和部署时具有更大的灵活性。

在功能上，1756-A7是将ControlLogix控制系统构建为机箱的重要组件。它提供背板连接，允许将模块安装在提供的模块插入插槽中。此外，它还装有电源的安装插槽，位于机箱的最左侧，支持超薄、标准和电源的安装。

关于其硬件结构，1756-A7的设计允许安装或不安装2个SEM螺钉。在没有SEM螺钉的情况下，除了2个平垫圈和2个分锁垫圈外，还需要2个星垫圈。同时，如果没有SEM螺钉，则需要4个十字螺钉；而如果与SEM螺钉一起使用，则只需要2个十字螺钉。

1756-A7 7槽ControlLogix机架

The 1756-A7 is a seven (7) slot chassis from the ControlLogix Programmable Automation Controller (PAC) platform. The chassis is an open device with no protective housing, and its design features are mainly reflected in the fact that it has only 2 mounting clips on the top and bottom, which gives it greater flexibility when installing and deploying.

Functionally, the 1756-A7 is an important component in building the ControlLogix control system as a chassis. It provides a backplane connection that allows the module to be installed in the module insertion slot provided. In addition, it has a power supply installation slot, located on the far left side of the case, supporting ultra-thin, standard and power supply installation.

Regarding its hardware construction, the 1756-A7 is designed to allow for the installation or non-installation of 2 SEM screws. In the absence of SEM screws, 2 star washers are required in addition to 2 flat washers and 2 split lock washers. At the same time, if there are no SEM screws, four phillips screws are required; If used with SEM screws, only 2 phillips screws are required.