RS485 to USB Converter

The TXDEN pin of the FT232RL is connected to the transmit and receive enable inputs of the SP3485, this line is used to control the transmission mode of the RS-485 transceiver. With the proper drivers installed, the FT232RL will enumerate as a virtual COM port; the drivers are available for Windows, Mac and Linux.

This breakout board includes the SP3485, FT232, TX/RX/RTS LEDs, Mini-B USB connector, filter capacitors, and other components shown on the schematic.

Features:

• Fully equipped with SP3485 RS-485 transceiver and FT232RL USB UART IC
• Operates from USB supply
• RX, TX, and RTS LED indicators
• Mini-B USB connector
• USB power and RX/TX lines broken out to a 0.1" pitch header
• RS-485 input/output broken out to RJ-45 connector, 3.5mm screw terminal, and 0.1" pitch header
• Driver/Receiver Enable connected to RTS line of FT232RL
• -7V to +12V Common-Mode Input Voltage Range

Documents:

• Schematic
• Eagle Files
• SP3485 Datasheet
• FT232RL VCP Drivers
• GitHub