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Product Overview
Connect the converter’s USB Port to a USB port on
your computer or USB hub.
When the installation is complete the converter
will appear in Windows Device Manager as an
additional COM port.
Most of the time a DB9 male will be a DTE. A
DB9 female will usually be a DCE.
A DTE device is “Data Terminal Equipment.” This
includes computers, PLCs, and most devices that
are not used to extend communications. (Think
COMPUTER for DTE.)
A DCE device is “Data Communications Equip-
ment.” This includes modems and other devices
that extend communications like RS-422/485,
fiber optic converters or radio modems. (Think
MODEM” for DCE.)
If both devices have a DB9 male connection you
will need a crossover cable. If both devices have
a DB9 female connection you will need a cross-
over cable.
When one device is male and one device is
female, use a straight-through cable.
When everything is installed and connected the
LED will blink to let you know that data traffic is
passing through the converter.
Loopback pins 2 and 3. Using Hyper Terminal or
a similar program, connect to the COM port. Set
the desired baud rate. Ensure that Hyper Termi-
nal local echo is OFF. Transmit data. If the same
data is returned the test is successful.
To prevent installation errors, do not plug in the
hardware until you have already installed the
drivers.
INSERT THE DRIVER CD INTO YOUR
CD-ROM AND INSTALL THE DRIVERS
BEFORE PLUGGING THE HARDWARE
INTO THE PC.
If you have inserted the hardware first
and the Found New Hardware Wizard
launched, click cancel to exit the wizard.
DB9 Pinout
Install the Drivers
Connect the Converter
Check LEDs
1
2
3
RS-232 Port
LEDs
USB Port
Loopback Test
4
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QUICK START
GUIDE
+ USO9ML2
+ One Meter USB Cable
+ CD-ROM with Drivers
Recommended Accessories
9PAMF6
6ft DB9 to DB9 Cable
Male to Female
USBAMBM-6F
6 ft. USB Cable
Document number – 710-11247-00_USO9ML2_3216
1-888-948-2248 | Europe: +353 91 792444
www.advantech-bb.com
707 Dayton Road | PO Box 1040 | Ottawa, IL 61350
Phone: 815-433-5100 | Fax: 815-433-5109
www.advantech-bb.com | E-mail: support@advantech-bb.com
Before you begin, be sure you have
the following:
USO9ML2
Isolated USB to
RS-232 Converter
Fast and easy on the web:
www.advantech-bb.com
Model Numbers
Troubleshooting
The converter comes in two formats: “Standard”
and “Locked Serial Number.” With the standard
format, each unit has a unique USB serial
number. In the locked serial number format
all units with the same model number use the
same USB serial number. The version you
select depends on your application.
Standard - Every unit is assigned a unique COM
port and a driver must be installed for each unit.
Ideal application: fixed locations.
Locked Serial Number – Units with the same
model number share the same COM port. The
driver only needs to be installed once for each
model number. Ideal application: field service.
Note: The locked serial versions, USO9ML2-LS,
share a common serial number and will install
using the same COM port each time. The standard
versions, USO9ML2, have unique serial numbers.
Drivers must be installed for each unit, and a unique COM port will
be assigned each time.
Are My Devices Wired As DTE or DCE?
(How to Check)
1. Use Rule of Thumb
If the device plugs into the computer serial
port and works normally, the device is wired
as DCE (or the connection cable is a crossover
type that makes it work as a DCE). If the device
connects to the computer port using a “null
modem” crossover cable, it is wired as DTE.
2. Use an RS-232 Line Tester
A quick and easy way to determine the
DTE/DCE port type is to use a RS-232 line
tester such as the 9PMTT. The tester can show
the signal state of any active RS-232 data lines
using LEDs. Active data lines are output from
a device. They may be either High or Low.