National Instruments USB-485/4 Serial Interface Device

The USB-485/4 (Part Numbers: 778476-104, 778476-94, 778476-54, 778476-44, 778476-14) is a 4-Port version of the Serial Interface Device by National Instruments. This device can be installed as a standard serial port. The user’s existing application allows the device to be installed with ease. The user can also install the device with applications written with NI-VISA. This instrument allows the user to transform a USB port into an ASP port. This transformation makes communication with serial devices possible. The NI USB-485/4 has a DB-9 male I/O connector. This Serial Interface Device’s case material is made of hard plastic with a metal baseplate.

The USB-485/4 enables users to communicate with multiple devices at a time. A data transfer rate of 460.8 kb/s is another great feature of this device. The National Instruments USB-485/4 also offers effective Discharge Protection. This Discharge Protection is Electrostatic in nature.

The power needs of the NI USB-485/4 Serial Interface Device from an external supply start at 9 Volts. The maximum value of this power requirement is 30 Volts.  The typical power requirement is 225 mA. The maximum power need is mA. This Serial Interface Device can handle RTS/CTS hardware handshake lines. This device has an automatic transceiver-control mode as well. This mode is used for 2-wire RS-485 devices. The National Instruments USB-485/4 allows for extensive cable lengths up to 4,000 ft. This hardware has the feature of software-selectable biasing and is compatible with any package with the Microsoft serial driver interface.