National Instruments Corporation USB-485/4, 4-Port USB to RS-485 Converter, Universal EURO 240Vac
- Compatible with any application that uses COM ports on Windows Vista (32- and 64-bit)/XP/2000 PCs
- Standard baud rates up to 460.8 kb/s, 128 B transmit-and-receive FIFOs
- Four fully functional RS485/422 ports, including RTS/CTS hardware handshake lines
- Automatic 2-wire transceiver-control mode, software-selectable biasing
- Externally powered; power and TX/RX LEDs, D-Sub 9-pin male connectors
- Easy programming in NI LabVIEW, NI LabWindows/CVI, and ANSI C/C++ with NI-VISA API
- Data Sheet
The National Instruments USB-485/4 (part number 778476-44) is a high-performance, industrial-grade USB-to-RS485 converter that provides four independent RS485 serial ports via a single USB connection. Designed for robust and reliable communication, it supports multipoint communication with up to 32 devices per port and features automatic transceiver control for simplified operation. The device is bus-powered, eliminating the need for an external power supply, and is compatible with Windows operating systems through NI-Serial driver support. The USB-485/4 is ideal for industrial automation, data acquisition, and laboratory applications requiring flexible and reliable serial connectivity. The universal Euro 240VAC reference indicates compatibility with international power standards for the included accessories.