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NI (National Instruments) USB-485/2 2-Port, USB, RS485/RS422 Serial Interface Device
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NI (National Instruments) · USB 2.0

USB-485/2

The NI USB-485/2, part number 778476-02, is a two-port USB interface for RS-485 and RS-422 serial communication. It provides two non-isolated serial channels through a USB 2.0 connection.

ManufacturerNI (National Instruments)
ModelUSB-485/2
Part Number778476-02
Product Type2-Port, USB, RS485/RS422 Serial Interface Device
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Free Shippingfull policy linked
30-Day Warrantystandard coverage
30-Day Returnspolicy applies
Technical Supportmodel & compatibility help
Supported Power InputUnited States 120VAC
Bus ConnectionUSB 2.0
Isolation TypeNone
Number of Serial Channels2
Supported Serial ProtocolsRS485, RS422
Front Connection TypeD-SUB
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Overview

Product overview

Key product information and technical features.

The USB-485/2 connects a USB host to RS-485 and RS-422 devices for asynchronous serial communication. Its two serial channels provide a USB-connected interface for equipment using these serial standards.

The interface uses USB 2.0 and D-SUB front connections. This model is non-isolated; review the NI hardware specifications and connection guidance when planning system wiring.

  • Two serial channels for RS-485 and RS-422 communication.
  • USB 2.0 host connection.
  • D-SUB front connections for serial wiring.
  • Non-isolated interface design.
  • Supports RTS/CTS hardware handshake lines and appears as a standard COM port for serial communications programs.
Verified specifications

Technical data

Verified product specifications.

Supported Power InputUnited States 120VAC
Bus ConnectionUSB 2.0
Isolation TypeNone
Number of Serial Channels2
Supported Serial ProtocolsRS485, RS422
Front Connection TypeD-SUB
NI part numbers778476-02
Condition & included items

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Compatibility

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NI

Manufacturer

USB 2.0

Bus Connection

USB-485/2

This product

Platform shown as listed by NI. Confirm controller, chassis and software fit for your system with NI before integration.
Manuals & software

Technical resources

Manuals, software and technical resources for this model.

Getting Started (NI)Getting Started · ni.com
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Specifications (NI)Specifications · ni.com
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Product Page (NI)Product Page · ni.com
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Shipping, warranty & returns

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Warranty
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Returns
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FAQ

Product-specific questions

Product-specific answers based on available technical information.

What serial protocols does the USB-485/2 support?

It supports RS-485 and RS-422 serial communication.

How many serial channels does it provide?

The USB-485/2 provides two serial channels.

What host interface and serial connections does it use?

It connects to the host through USB 2.0 and uses D-SUB front connections for serial communication.

Is the USB-485/2 isolated?

No. The listed isolation type for this model is None.

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