USB to RS-232 interface converter
USB to RS-232 interface converter is intended for conversion from USB interface (USB 1.1, USB 2.0) into two independent RS-232 interfaces in duplex and half-duplex modes of data exchange.
USB to COM-port interface converter is based on FTDI chip and provides reliable operation 24/7.
1. Power supply.
Power supply is made from host-controller (power unit of personal computer) or from USB-hub with internal power supply +5 V.
Connection is done to host-controller (system case of personal computer) or to USB-hub through cable USB-A, mounted into case of the converter. Peripheral devices with RS-232 interfaces is connected through DB-9F connectors (female).
3. Interaction of the personal computer with USB to RS-232 interface converter.
Physical USB-port of the converter – channel of USB interface, which is connected to computer or hub. Virtual USB-ports of the converter are created in Windows OS after connection of the physical USB-port to computer and installation of the converter drivers: “USB Serial Converter A“ and “USB Serial Converter B”.
Physical COM-ports of the converter – channels of RS-232 interface, having names COM1 and COM2, to which external peripheral devices are connected. Virtual COM-ports of the converter are created in Windows OS after installation of the converter drivers. These program virtual ports correspond to physical COM-ports of the converter, which Windows OS gives names “COMx” with numbers from 1 to 256.
As a result with virtual COM-ports of the converter a software application can work as with general COM-ports and request to virtual COM from the application leads to control over physical port port of the converter.
4. FTDI FT4232H drivers.
Operational systems for FTDI drivers:
- Windows 10
- Windows 8.1
- Windows 8.1 x64
- Windows 8
- Windows 8 x64
- Windows Server2012
- Windows Server 2008 R2
- Windows 7
- Windows 7 x64
- Windows Server 2008
- Windows Server 2008 x64
- Windows Vista
- Windows Vista x64
- Windows Server 2003
- Windows Server 2003 x64
- Windows XP
- Windows XP x64
- Windows ME
- Windows 98
- Mac OS X
- Mac OS 9
- Mac OS 8
- Windows CE.NET (Version 4.2 and greater)
- Windows RT
Support for WinCE
FTDI drivers are available for Windows CE 4.2-5.2, 6.0/7.0 and 2013.
All drivers can be downloaded from the web-site of the manufacturer of FT4232H chip: https://www.ftdichip.com.
USB interface parameters #
|Quantity of channels||1|
|Quantity of ports||2|
|Version of interface||USB 1.1, USB 2.0|
|Connector type||USBA-1J (Type «А») (male)|
RS-232 interface parameters #
|Quantity of channels||2|
|Connector type||DB-9M (male)|
|Data exchange mode||half-duplex, duplex|
|Signals||TxD, RxD, RTS, CTS, DTR, DSR, DCD, RI, GND|
|Baud rates||from 2 400 to 115 200 bit/sec|
|Data formats||8-N-1, 8-E-1, 8-O-1|
|Flow control||no, XON/XOFF, CTS/RTS|
|Word length||7 or 8 bits|
|Stop bits||1 or 1.5|
|Control bit||none, even, odd|
Power supply parameters #
|Voltage||5 V DC|
|Current consumption||100 mA (not more)|
Area of application #
|Area of application||internal|
|Temperature range||0... + 55 deg. C|
Constructional parameters #
|Dimensions||93 х 52 х 16 mm (not more)|
|Case material||ABS plastic|
|Weight||0.1 kg (not more)|
RS-232 interface cable characteristics #
|Type||24AWG (5 category)|
|Active resistance||7 Ohm (100 meters of single wire)|
|Capacity||0,005 uF (100 meters of twisted pair)|
|Wave resistance||120 Ohm|
Cable length and baud rate at data exchange on RS-232 interface #
|Baud rate (bits/sec)||Distance, m|
|1 200 – 4 800||200|
Order information #
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"USB to RS-232 interface converter"
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