S800、S900是用于过程控制站的分布式I/0，它们通过Prof ibusDP现场总线与其所属的控制器
通信，既可以安装在控制室，也可以安装在现场以尽量接近现场变送器和执行器，从而 节省电缆并
减少安装费用。
S800 1/0及s900 I/0 具有以下优点:
●灵活性:对安装数量没有限制，可小数量安装，也可大量安装，可以安装在室内，也可安装在室
外，可以安装在墙上，也可安装在机柜中。
●模块化:可一步一步扩展，不会因自身限制而影响系统扩展。
●经济性:节省硬件，电缆，从而节省安装及维护费用.
●可靠性:因其自诊断及冗余等特性，可平滑的实现自动切换。
S800/S900型1/0 采用模块化设计，DIN 标准导轨式安装，由于对空间以及环境要求不苛刻，
S800/S900型I/0尤其适用于安装在分散的场合，并且对处理信号几乎没有要求，从而现场仪表和设
备信号可以直接接线到S800/S900 I/0 站。
modification of names, comments, data or module types
●Search and display based on specific criteria
● Cross reference can be used in systems that use a large number of variables or process points
Programs and drawings to quickly find the desired variable or process point within the scope
noodle.
ABB is the world’s largest in measurement and process automation
One of the equipment and system suppliers.
An important factor in maintaining this market position is the quality of our products
quantity, and quality from manufacture all the way to service. ABB automation early
In 1990, it obtained the DQS certificate based on ISO9001 certification,
EQnet quality based on ISO 9000/EN 29000 was subsequently achieved
Certification.
However, the Freelance 800F is more than technical excellence, I
We have also spent a lot of effort in proper planning,
