Serial Interface Devices

Control external serial hardware over RS232, RS422, RS485, and more with NI serial interface devices

Image of National Instruments' Serial Interface Devices NI serial interface devices offer several options for connecting to serial hardware. Customers can choose from Ethernet, USB, PCI, PCIe, or ExpressCard interfaces to add up to 16 serial ports to a system. Users can choose from common serial protocols such as RS232, RS422, and RS485. The serial interface device also offers various isolation, hyperthreading, and multiprocessor compatibility options. Some models also support 4- and 2-wire transceiver modes for full- and half-duplex communication. NI serial interfaces appear as standard COM ports for compatibility with programs that use serial communications.

  • Up to 16 serial ports per device
  • Supports RS232, RS422, and RS485
  • Industry-standard transfer rates
  • Ethernet, USB, PCI, and PCIe bus connectivity
  • Supports 4- and 2-wire transceiver modes
  • Compatible with programs that use serial communications
  • Instrument control
  • Automated testing
  • Serial communication

Serial Interface Devices

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
USB-232/2, 2-PORT USB TO RS-232778473-02USB-232/2, 2-PORT USB TO RS-2325 - ImmediateView Details
USB-232/4, 4-PORT USB TO RS-232778473-04USB-232/4, 4-PORT USB TO RS-2327 - ImmediateView Details
USB-485, 1-PORT USB TO RS-485 CO778475-01USB-485, 1-PORT USB TO RS-485 CO23 - ImmediateView Details
USB-485/2, 2-PORT USB TO RS-485778476-02USB-485/2, 2-PORT USB TO RS-4855 - ImmediateView Details
USB-485/4, 4-PORT USB TO RS-485778476-14USB-485/4, 4-PORT USB TO RS-4854 - ImmediateView Details
Published: 2020-08-26