InLine® USB to serial RS485 converter with FTDI chipset

The InLine® USB to serial RS485 converter with FTDI chipset connects a computer with a USB-A port directly to RS485 devices and bus systems. It enables reliable serial data communication via a virtual COM port, allowing existing software to be used without complex modifications. The adapter is suitable for Modbus RTU and other RS485 applications in industrial automation, building automation, measurement and control technology, and energy monitoring.

Key features

• Connects USB-A to RS485 devices and bus systems
• FTDI FT232RNL chipset for reliable data transmission
• Automatic hardware direction switching for half-duplex communication
• No configuration via RTS/CTS signals or software commands required
• Integrated 120 Ω terminating resistor reduces signal reflections
• ESD protection, protective diodes and resettable fuses
• USB-powered 5 V output up to 400 mA for low-current devices
• Status indicators: PWR, TXD, RXD

Specifications

• Brand: InLine
• MPN: 33307C
• Product type: USB to Serial RS485 adapter
• Serial interface type: RS-485
• Chipset: FTDI FT232RNL
• Host connector: USB-A male
• Device connector: RS485 screw terminal
• Pin assignment: GND, A, B, +5 V
• Baud rate: 300 to 512,000 bps
• Transmission mode: Half-duplex with automatic direction switching
• Maximum RS485 cable length: up to approx. 1.2 km
• Maximum USB cable length: up to approx. 5 m
• Bus participants: up to 32 devices per bus segment
• Termination resistor: Integrated 120 Ω
• +5 V output: USB-powered, max. 400 mA
• USB protection: 200 mA PTC fuse, ESD protection
• RS485 protection: Protection diodes, resettable fuse
• Status indicators: PWR, TXD, RXD
• Supported operating systems: Windows XP/7/8/8.1/10/11, Linux, macOS, Android, Windows CE
• Operating temperature: -40 °C to +85 °C
• Humidity: 5 % to 95 % RH, non-condensing
• Country of origin: China
• Customs tariff number: 8536699099