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.
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 1Mbps3Mbps.
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
D-SUB, 9 pins
USB 2.0 Full-Speed, Micro USB
From 300 bps to 1M bps
Bus-Pin ESD protection
support up to 256 nodes on a bus
120 Ohm resistor selectable jumper
15-90%, not condensing
PCBA Size (L * W * H)
56.50mm * 31.20mm * 14.20mm
4. Hardware Description
4.1 RS485 Connector Pinout
4.3 LED Indication
Red led flash to indicate send data.
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
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