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INTRODUCTION (USB TO
DUAL RS232 CONVERTER)
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The
USB-232A-1 is a port-powered USB to RS-232 converter that
can be used to convert any standard USB port (USB 2.0 -
backward compatible) into two RS-232C ports and vice versa.
The unit uses the latest FTDI chipset and is fully
compatible with Windows 7/Vista/XP/Server2008/ Server2003/2000/98
(32-bit), Windows 7/Vista/XP/ Server2008/Server2003 (64-bit), Win CE, Mac, and Linux.
Product Comparison |
Declaration of Conformity
user manual | 
download drivers |
FAQs |
product selection guide
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(Windows 7
supported!)
$44.95
Order Here |
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FEATURES (USB TO DUAL RS232
CONVERTER)
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Adds
two RS-232 ports to your USB port. |
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RS-232 data & signals: TX, RX, RTS, CTS, DTR,
DSR, DCD, RI, and GND. |
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Supports 300 to 128,000 baud (auto-sensing and
self-adjusting). |
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Supports
Windows 7/Vista/XP/Server2008/Server2003/2000/98
(32-bit), Windows 7/Vista/XP/Server2008/Server2003 (64-bit), Win CE, Mac, and Linux. |
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Supports remote wakeup and power management. |
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Plug and play (hot-pluggable, data format
auto-sensing and self-adjusting). |
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Port-powered, no external power required. |
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No IRQs required, no IRQ conflicts. |
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CE/FCC certified: strictly certified by world-class lab SGS. |
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5-year
manufacturer's warranty. |
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SPECIFICATIONS
(USB TO DUAL RS232
CONVERTER) |
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Part Number:
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USB-232A-1 |
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Compatibility: |
USB 2.0
(backward compatible) and EIA/TIA RS-232C standards |
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Power Source: |
Port power from USB port |
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Current
Consumption: |
Less than
100mA |
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Output Power on Pin 3: |
About -9VDC |
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Baud
Rates: |
300 to 128,000bps (auto-sensing and
self-adjusting) |
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Distance: |
USB side:
10ft (3m); RS-232 side: 16ft (5m) |
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Connectors: |
USB side: Type
A Female; RS-232 side: 2x DB-9 Male |
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LEDs: |
2x TX, 2x RX
and 1x Power |
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Dimensions (H x W x D): |
0.9 x 2.8 x
3.5 in (24 x 72 x 88 mm) (excluding cable) |
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Cable Length: |
2 ft (0.6 m) |
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Weight: |
2.9 oz (83 g) |
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Operating Temperature: |
32ºF to 95ºF
(0ºC to 35ºC) |
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Operating Humidity: |
Up to 90% RH (no condensation) |
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CONVERTER CONNECTOR PINOUTS
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USB
Side |
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USB
Type A Connector (view from front) |
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RS232 Side (2 nos.) |
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(2x) |
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Pin |
Function |
Description |
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1 |
DCD |
Data Carrier Detect |
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2 |
RX |
Receive Data |
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3 |
TX |
Transmit Data |
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4 |
DTR |
Data Terminal Ready |
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5 |
GND |
Ground (Signal) |
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6 |
DSR |
Data Set Ready |
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7 |
RTS |
Request to Send |
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8 |
CTS |
Clear to Send |
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RI |
Ring Indicator |
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DB-9 Male (view from front) |
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DB-9
/ DB-25 CONVERSION TABLE (DTE)
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DB-9 Pin Assignment: |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
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DB-25 Pin Assignment: |
8 |
3 |
2 |
20 |
7 |
6 |
4 |
5 |
22 |
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Function: |
DCD |
RX |
TX |
DTR |
GND |
DSR |
RTS |
CTS |
RI |
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TROUBLESHOOTING INSTRUCTIONS
FOR USB TO DUAL RS232 CONVERTER
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1) Driver installation |
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Make sure
that the USB-232A-1 is connected to your USB port, and the
driver is installed correctly (as shown above); otherwise, please
reinstall the driver (refer to user
manual for details).
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2)
Make
sure the “Power” LED on USB-232A-1 is lit up.
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3) Loopback Test |
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Connect pin 2 and 3 of the DB-9 connector (as shown above).
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Run 232Analyzer
FREE version software on your computer.
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Select "ASCII" for both the Send and Receive data
formats. Then send command and/or string such as
"CommFront" from the 232Analyzer software. You should
receive an echo of the command/string sent
("CommFront"). By performing a simple loopback test like
this, you can test both the transmitter and receiver of
the converter. This is very helpful when you are in
doubt about the performance of your converter.
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Screenshot: Send/receive
commands from 232Analyzer software. |
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232Analyzer is an advanced RS232 Serial Protocol Analyzer
software
that allows you to control, monitor and analyze serial port
(RS232 / RS485 / RS422 / TTL, etc.) activities.
Not just the data,
it also allows you to monitor or change RS-232's line
states: RTS, CTS, DTR, DSR, DCD, and RI.
The FREE version (no time
limitation) can be downloaded from
here.
TECH NOTES
RS-232: 3 easy steps to understand and control
your RS232 devices |
