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Unable to use NI USB Serial Ports after Installing NI-Serial After upgrading or installing NI-Serial on a new system, I was unable to use the NI USB or ExpressCard serial ports attached to my computer. This hardware worked fine when a previous version of NI-Serial was installed on my system or when I use it with another computer. How can I get my ports URL: http://digital.ni.com/public.nsf/allkb/099F2D2720D86E8586257479004B8A37

843x系列硬件支持的波特率 我正在看NI PCI/PXI 843x设备的产品页，产品页上列出了设备最大的波特率是3Mb/s。可是在这个产品的用户手册/规格说明书中，最大波特率只有2Mb/s。哪份材料是正确的？ URL: http://digital.ni.com/public.nsf/allkb/DE903C4F037C788548257212001F37AB

How do I Connect and Configure a 2-Wire Device With RS-485 I have a 2-wire serial device (RS-232) that I want to connect to an RS-485 serial port. Since RS-485 communication is usually 4-wire, how do I connect it and how do I configure Windows to communicate with the device? URL: http://digital.ni.com/public.nsf/allkb/3EB322DAEAACB19D862571F500021C00

¿Cómo Conecto y Configuro un Dispositivo de 2-Cables Con RS-485? Tengo un dispositivo serial de 2-cables (RS-232) que quiero conectar a un puerto serial RS-485. Dado que la comunicación en RS-485 usualmente es de 4-cables, ¿cómo conecto y configuro Windows para comunicarme con el dispositivo? URL: http://digital.ni.com/public.nsf/allkb/1C172D7BDC8315DA86257461005CB4C6

Pinout For The 68-pin SCSI Connector Used on National Instruments Serial Boards Where can I find the pinout for the 68-pin SCSI connector used on National Instruments serial boards? URL: http://digital.ni.com/public.nsf/allkb/0044E335E0E17923862571E3003F1878

Baud Rates Supported by 843x Serial Hardware I am looking at the product page for my NI PCI/PXI 843x device, and it lists the maximum baud rate as 3Mb/s. However, the User Manual/Specifications document for this devices claims that the maximum baud rate is only 2Mb/s. Which resource is correct? URL: http://digital.ni.com/public.nsf/allkb/23FFC019F92E2D94862571B5007B4C16

RS-422 是否兼容 LabVIEW Real-Time？ 我需要使用 RS-422 与我的一些设备通信。是否可以在 LabVIEW Real-Time 中使用？ URL: http://digital.ni.com/public.nsf/allkb/93DC21C858DF42C54825719B0015EF14

RS-485的端口能够从RS-423的仪器获得数据吗？ 我有一个RS-423的仪器，现在想用NI RS-485卡从中获得数据，能够实现吗？ URL: http://digital.ni.com/public.nsf/allkb/BA03947EB71B9E944825717D00238447

Upgrading the ENET-232 or ENET-485 Firmware Problem: How do I upgrade the firmware on my ENET-232 or ENET-485? Solution: The NI-Serial software contains a firmware update utility you can use to access new features that may be added to the serial ENET interface in the future. URL: http://digital.ni.com/public.nsf/allkb/78AB7DECA19476B68625715600465EB8

NI RS-485 串行通信卡有哪些不同的收发模式？ NI RS-485 串行通信卡有哪些不同的收发模式？ 什么时候RS-485端口会进入三态状况？ URL: http://digital.ni.com/public.nsf/allkb/30E3C8A9134142954825714800118751