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1. General Description:                                  


USB2RS485 module is a plug and play and bi-directional port powered USB to RS485 converter which realizes long-distance communication between your Raspberry Pi/SBC/PC and other devices stably though RS485 Bus connection.

It’s very easy to use, just like control a serial port on all systems. Compatible with all ready-made serial port tools.

On-board isolated RS485 Transceiver, has a standby bus failure protection function to ensure that the receiver output is high when the receiver input is open, short, or when the bus is idle. Compliant with TIA/EIA-485A EN62368 and AEC-Q100 standards. Features Bus fail-safe and Bus driver short circuit protection.The transceiver have an exceptionally high input impedance, which places only 1/8 of the standard load on a shared bus and up to 256 transceivers and it can also be mixed with the standard RS485 transceiver with 32 unit loads (cumulative receiver load cannot exceed 32 units).

With small size and convenient operation, It’s a cost-effective solution that are safe and reliable for all your data-conversion / device-protection applications for any experienced engineer interfacing to expensive industrial equipment yet simple enough for home use by an amateur hobbyist.



2. Features         

                                     

       1. [High compatibility] Support Windows XP/7/8/10, Mac OS, Linux 3.2 greater, Ubuntu 11.10 greater and Android system.

       2. [Plug and Play USB Device] USB 2.0 full speed compatible. Support wider RS485 data transfer rates, From 300 bps to 3Mbps.

       3. [Excellent Chipset] On board FTDI FT230X and semi-duplex enhanced RS485 isolated transceiver TD541S485H.

       4. [Industrial Design] isolated power supply and isolation signal design, Provides Bus-Pin ESD protection up to 15kV(HBM) and greater than 25kV/us CMTI.

       5. [Flexible] 120 Ohm resistor jumper selectable. designed by 1/8 unit load, support up to 256 nodes on a bus.



3. Technical Specification                                

Connectors


RS485

D-SUB, 9 pins

USB

USB 2.0 Full-Speed, Micro USB

RS485 Features



Data Rate


From 300 bps to 1M bps


Bus-Pin ESD protection

15kV(HBM)

Nodes

support up to 256 nodes on a bus

Termination

120 Ohm resistor selectable jumper

Other

 

Work Temperature

-40°~ 85°

Relative humidity

15-90%, not condensing

PCBA Size (L * W * H)

56.50mm * 31.20mm * 14.20mm

Weight

15.5 g

4. Hardware Description        

4.1 RS485 Connector Pinout

Pin

Description

 1

Signal A

2

Signal B

3

NC

4

NC

5

GND

6

NC

7

NC

8

NC

9

NC






4.3 LED Indication

   




LED Name

Description

 

   Tx


Red led flash to indicate send data.

   Rx

     Red led flash to indicate receive data.

                                                 



4.2 120 Ohm Resistor Setting.        

There is a wire jumper for enable or disable the 120 ohm resistor function.



                 

                                                                    Enable120 Ohm Resistor

       

         

        

 

                                                              Disable 120 Ohm Resistor     


5. Driver Install           

Royalty free VIRTUAL COM PORT (VCP) DRIVERS for:


Windows 10 32,64 bit

Windows 8/8.1 32,64-bit

Windows 7 32, 64-bit

Windows Vista and Vista 64-bit

Windows XP and XP 64-bit

Server 2003, XP and Server 2008/2012

Windows XP Embedded

Windows CE 4.2-5.2, 6.0, 7.0, 2013

Mac OS-X ·

Linux 3.2 and greater

Android


The drivers listed above are all available to download for free from FTDI website (https://ftdichip.com/drivers/vcp-drivers/).

Various 3rd party drivers are also available for other operating systems - see FTDI website

(www.ftdichip.com) for details.

For driver installation, please refer to http://www.ftdichip.com/Documents/InstallGuides.htm

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