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.
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Features #
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.
2. Connection.
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
- Linux
- Mac OS X
- Mac OS 9
- Mac OS 8
- Windows CE.NET (Version 4.2 and greater)
- Android
- 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 #
| PARAMETER | VALUE |
|---|---|
| Quantity of channels | 1 |
| Quantity of ports | 2 |
| Version of interface | USB 1.1, USB 2.0 |
| Connector type | USBA-1J (Type «А») (male) |
| Signals | DATA+, DATA- |
RS-232 interface parameters #
| PARAMETER | VALUE |
|---|---|
| Quantity of channels | 2 |
| Connector type | DB-9M (male) |
| Data exchange mode | half-duplex, duplex |
| Connection scheme | 9-wire |
| 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 #
| PARAMETER | VALUE |
|---|---|
| Source | USB interface |
| Voltage | 5 V DC |
| Current consumption | 100 mA (not more) |
Area of application #
| PARAMETER | VALUE |
|---|---|
| Area of application | internal |
| Temperature range | 0... + 55 deg. C |
| Exploitation mode | round-the-clock |
Constructional parameters #
| PARAMETER | VALUE |
|---|---|
| Dimensions | 93 х 52 х 16 mm (not more) |
| Case material | ABS plastic |
| Weight | 0.1 kg (not more) |
RS-232 interface cable characteristics #
| PARAMETER | VALUE |
|---|---|
| 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 #
| PARAMETER | VALUE |
|---|---|
| Baud rate (bits/sec) | Distance, m |
| 230 400 | 15 |
| 115 200 | 25 |
| 57 600 | 50 |
| 38 400 | 80 |
| 19 200 | 120 |
| 14 400 | 160 |
| 9 600 | 200 |
| 1 200 – 4 800 | 200 |
Order information #
USB to RS-232 interface converter
Order code: USB-COM-001
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"USB to RS-232 interface converter"
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