在现代工业各领域，多采用到PLC，PLC主控下方排列大量接线端子，在通过排布大量的各类线缆至现场各个位置，传统的布线模式效率低下且容易出错，不易排查检修。尽管如此，现在仍然有很多行业在采用这种布线模式。随着人工成本幅度增加，这样的方式显然不能与时俱进，随着现场总线技术的飞速发展，主流PLC品牌早已标配各种专用协议的总线接口，从而使工程师可以通过系统组态的方式来实现分布式控制，而分散在各个信号端的分布式I0只需-根网线或屏蔽线就可以实现通讯连接，多见于柜内安装，现场人员只需要就近完成接线工作即可，既节省了线缆、人工等成本，还提高了项目效率。当然仍然要安装分柜、配接线端子等工作，但却是非常高效的布线方案了。

CC-PAIH01

Features:
I/O modules and field terminals combined in the same area
Two level “detachable” terminals
On site power can be provided through IOTA
Redundancy is directly available on IOTA

The Honeywell C-series I/O modules are equipped with a unique patented hot channel shape, and their components can be implemented in a redundant manner to provide a solution without a single point of failure. These highly flexible modules can be placed locally and remotely on the control processor. Honeywell C-series I/O modules, together with I/O terminal components (IOTAs), perform module diagnostic input and output scanning and processing on all field I/O data and events. In order to more effectively utilize controller resources, I/O processing and control processing functions are executed separately, so the I/O sampling rate is completely independent of the number of I/Os, controller load, processing, and alarms. It also allows for more effective utilization of advanced control processor capabilities and prepares for future I/O expansion.

In various fields of modern industry, PLC is commonly used, A large number of wiring terminals are arranged below the PLC main control, and the traditional wiring mode is inefficient and prone to errors, making it difficult to troubleshoot and repair by arranging a large number of various cables to various locations on site. Nevertheless, there are still many industries adopting this wiring model. With the increase in labor costs, this method obviously cannot keep up with the times. With the rapid development of fieldbus technology, mainstream PLC brands have already been equipped with various specialized protocol bus interfaces, allowing engineers to achieve distributed control through system configuration. Distributed I0 distributed at various signal ends only requires a network cable or shielded wire to achieve communication connection, which is commonly seen in cabinet installation. On site personnel only need to complete the wiring work nearby, which not only saves costs such as cables and labor, but also improves project efficiency. Of course, it is still necessary to install sub cabinets and wiring terminals, but it is a very efficient wiring scheme.