NI-9853 高速控制器局域网 (CAN)接口

Description

NI-9853 高速控制器局域网 (CAN)接口

NI-9853是一款2端口的高速CAN模块，来自知名品牌NI（National Instruments）。该模块设计有两个9引脚的公口DSUB连接器，这些连接器用于提供至CAN总线的连接。每个端口都包含CAN_H和CAN_L引脚，用于连接CAN总线信号，且应使用双绞线来连接这些总线信号。

每个端口还配备有两个公用引脚（COM），这些引脚在内部连接至模块的隔离参考地，并用作CAN_H和CAN_L的参考地。用户还可以将CAN总线的参考地（也称为CAN_V-）连接到一个或全部COM引脚。

此外，每个端口还带有一个可选的屏蔽引脚SHLD，这个引脚可以连接屏蔽式CAN电缆。在噪声环境下，连接SHLD引脚有助于增强信号完整性和EMC性能。

在供电方面，NI-9853的CAN0端口由模块内部供电，无需连接外部电源，而CAN1端口则需要由+8V~+25V的外部电源供电。

NI-9853 高速控制器局域网 (CAN)接口

The NI-9853 is a 2-port high-speed CAN module from National Instruments. The module is designed with two 9-pin male DSUB connectors that provide connectivity to the CAN bus. Each port contains CAN_H and CAN_L pins for connecting the CAN bus signals, and twisted pair cables should be used to connect these bus signals.

Each port is also equipped with two common pins (COM) that are internally connected to isolated reference points of the module and used as reference points for CAN_H and CAN_L. The user CAN also connect the reference ground of the CAN bus (also called CAN_V-) to one or all of the COM pins.

In addition, each port comes with an optional shielded pin SHLD that connects to a shielded CAN cable. Connecting SHLD pins helps to enhance signal integrity and EMC performance in noisy environments.

In terms of power supply, the CAN0 port of the NI-9853 is powered by the internal power supply of the module, without connecting to an external power supply, while the CAN1 port needs to be powered by an external power supply of +8V to +25V.