描述

NI-9853 高速控制器局域網(wǎng) (CAN)接口

NI-9853是一款2端口的高速CAN模塊，來自知名品牌NI（National Instruments）。該模塊設(shè)計(jì)有兩個9引腳的公口DSUB連接器，這些連接器用于提供至CAN總線的連接。每個端口都包含CAN_H和CAN_L引腳，用于連接CAN總線信號，且應(yīng)使用雙絞線來連接這些總線信號。

每個端口還配備有兩個公用引腳（COM），這些引腳在內(nèi)部連接至模塊的隔離參考地，并用作CAN_H和CAN_L的參考地。用戶還可以將CAN總線的參考地（也稱為CAN_V-）連接到一個或全部COM引腳。

此外，每個端口還帶有一個可選的屏蔽引腳SHLD，這個引腳可以連接屏蔽式CAN電纜。在噪聲環(huán)境下，連接SHLD引腳有助于增強(qiáng)信號完整性和EMC性能。

在供電方面，NI-9853的CAN0端口由模塊內(nèi)部供電，無需連接外部電源，而CAN1端口則需要由+8V~+25V的外部電源供電。

NI-9853 高速控制器局域網(wǎng) (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.

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