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USB to RS485 Adaptor

Code: PI-USB/RS485

Price:  Call for Pricing

Product Brochure - USB to RS485 Adaptor (0,68 MB)


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The USB-Nano-485 connects RS-485 devices very easily using a standard PC USB-port.


  • Echo and Bus Termination are configurable using 4 way DIL-switches.
  • Status LEDs for transmit, receive and power facilitate error diagnostics.
  • Plug-in connector for quick and easy  connection.
  • Suited for use with notebooks and configuration kits.

The device is connected to the PC directly or through an USB extension cable which is included.  After connection a yellow power LED lights up. At first use, you must install the driver from CD.

Connection to the RS-485-Bus:
X - not used
A - RS-485-Bus Data+
B - RS-485-Bus Data-

To configure Echo or termination resistors, screw at the bottom cover to remove the top cover and gain access to the DIP switches.

When DIL switch SW 1 is ON, an Echo is produced on the receive line. Several protocols use this to check data transmission validity. Default is Echo off.

Bus Termination:
( 1x220Ω  and 2x390Ω). In general, both ends of a RS-485-bus should be terminated. If the device itself terminates the bus, the DIL switches SW 2-4 should be “ON”. Default is termination resistors connected.

Technical Data:
2-wire, RS-485.
Up to 32 devices on the bus.
Maximum cable length 1,200 m.
Up to 3 MBit/sec data rate.
Size: 12 x 20 x 74 mm.
Supplied with USB extension cable.
Pluggable RS485 connector.
Driver CD.
Supports USB 2.0 and 1.1.
Operating systems: Windows 9x, ME, 2000, XP, Vista, Linux (post Kernel 2.4.18).
Powered from USB port.

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