ABB AC 900F学习笔记72：Freelance_Mounting_and_Installation_AC_900F_Controller-32

6.12 Serial Interfaces

串口

Serial interfaces of the CPU module comply with the EIA RS-232 and EIA RS-485 standards.

CPU模块的串行接口符合EIA RS-232和EIA RS-485标准标准。

Serial interfaces SER1 and SER2

串行接口SER1和SER2

The SER1, SER2 serial interfaces are connected by means of a removable 9-pin terminal block. They can be configured for RS-232 or RS-485 and used e.g. for Modbus (master/slave).

SER1、SER2串行接口通过可拆卸的9针连接接线盒。他们可以配置为RS-232或RS-485和使用，例如Modbus(主/从)。

6.12.1 RS-232 Connection

RS-232连接

     RS-232 is a frequently used interface, also known under the name V.24. This interface standard has been designed for two communication devices which each may provide a data source TX and a data sink RX. RS-232 is a point-to point connection, the signals are of bipolar type, there are no termination resistors and the cable length is limited to about 15 m at 19.2 kBit/s.

     RS-232是常用接口，同时也命名为V.24。此接口标准被设计用于均提供数据源TX和数据接收RX的两个通讯设备。RS-232是点对点连接。信号为双极性。无终端电阻，以19.2 kBit/s传输时电缆长度限制在15米左右。

Single controller

单控制器

In case of a single controller, one can establish a RS-232 connection to the communication partner directly from SER1 or SER2. At least two data wires RxD/TxD and a ground connection SGND will be required. Control signals RTS and CTS are optional

单控制器情况下，可以直接通过串口1或者串口2与通讯伙伴建立RS-232连接。至少需要两根数据线RxD/TxD和地线。控制信号RTS和CTS是可选的。

Redundant controller

冗余控制器

 

 

The RS-232 lines of a redundant controller should first be connected to terminal strips and then be guided to the field. The terminal strips must be arranged as close as possible to the controller

冗余控制器的RS-232线应首先连接到端子排，然后引导到现场。接线端子排必须尽可能靠近控制器。