Product specifications
WuT 38211
Interface USB <> RS232/RS422/RS485 Industry 1kV isolation with overvoltage protection
The USB Interface model 38211 converts a USB interface into a full-function serial interface. RS232, -422 and -485 devices as well as RS485 bus systems can now be connected through the USB port.
Product properties:
Bi-directional conversion of USB into RS232, RS422 or RS485 interface
USB 2.0 Full Speed Device (12 Mbit/s)
Power supply via USB
Compatible with RS485 2-wire and 4-wire bus systems
Automatic bus access control
Galvanic isolation min. 1kV DC
Integrated overvoltage protection for the serial port
Common solution for the Windows, Linux and Mac world
Careful circuit design and generous component dimensioning
ensure more than 25 years of service life
Conforms to standards both in office and industrial environments:
Increased noise immunity for industrial areas
Stricter noise emission for residential and commercial areas
Overvoltage protection for serial interfaces
The permissible voltages allowed to have an effect on serial ports in case of an error are limited to rather low values according to the data sheet specifications for the interface components. Voltages which exceed these values even for a short time will inevitably result in damage to or even destruction of the integrated circuits.
To prevent such effects, the USB Interface 38211 includes integrated overvoltage protection which limits the maximum occurring signal voltage in a variety of applications to harmless values by using Transil diodes.
Connections and displays:
- USB port: Type B female
- Serial port: RS232/422/485 interface, 9-pin SUB-D adapter
- Operating modes: RS232, RS422, RS485 2-wire with automatic control, with and without echo, RS485 4-wire with automatic control
- Baud rate: Standard: 300..115200 baud, Configurable: application- and operating system-specificm, up to 1 Mbaud (RS232), up to 3 Mbaud (RS422, RS485)
- Data format: Data bits: 7,8, Stop bits: 1,2, Parity: odd, even, no, mark, space
- Signal lines:, RS232: RxD, TxD, RTS, CTS, DTR, DSR, DCD, RI, RS422: RxD A/B, TxD A/B, CTS A/B, DTR A/B (RTS A/B), RS485: RxD A/B, TxD A/B,
- RS485 switching time: A bit time for switching between sending and receiving
- Termination: Connectable termination network for RS485 operation
- Overvoltage protection: Limiting of the signal voltages using suppressor diodes
- Galvanic isolation: Isolation voltage min. 1kV DC between USB and serial connection
- USB-UART: FTDI FT232R
- Power supply: 5V DC over USB, optional supply from external 5V power supply
- Current consumption: Maximum: 200mA, Idle: RS232 typ. 70mA, RS422/485 typ. 90mA
- Displays: 1x LED Data, 1x LED On Line
Housing and other data:
- Housing: Plastic housing for top hat rail installation, 105 x 22 x 75mm (L x W x H)
- Enclosure rating: IP20
- Weight: approx. 170g
- Enclosure rating: IP20
- Ambient temperature: Storage: -40..+70°C, Operating in non-rowed installation: 0..+60°C, Operating in rowed installation 0..+50°C
- Permissible relative humidity: 5..95% RH (non-condensing)
- MTBF: 358,939h @25°C per MIL-HDBK-217
- Life expectancy: > 25 years at 25°C ambient temperature
- Scope of delivery: Interface USB <> RS232/422/485 Industry, USB cable with ferrite bead, Product CD with driver and manual in German and English
- Wiesemann & Theis product -
