MULTICOM
Universal isolated USB
to serial converter.
Multifunctional unit , converts:
› USB RS232/485/422 or
› RS232 RS485/422
Powered via USB port or external power adaptor
Compact unit , easily hand-held or wall/DIN rail mounted
Application auto-detection! Simply wire up your Multicom
to suit your needs, and let the unit con gure itself!
1
Speci cations
Available sockets
USB (B type) USB 2.0 (5V DC)
DB9 male (or female) RS232
RJ11 RS232
5-pin screw terminal RS485/422
Converts USB RS232/485/422 or RS232 RS485/422
Kit contains
1x Multicom converter
1x USB type A to type B cable
1x 4-core RS232 cable + 2x DB9-female to RJ11 adaptors
Supply voltage 5V DC. Powered via USB port or external
power adaptor (sold separately)
Current 130mA max
Operating temperature -10 to 70°C (14 to 158°F)
Isolated data transmission
RS485/422 isolation galvanic and RF coupling eliminates
long term optocoupler dri . 2500V RMS 1 minute.
Simpli ed con guration program, with 1-click conversion
from RS232 RS485/422
Supports multiple baud rates
USB RS232/485/422 300–230.4K baud
RS232 RS485/422 300–115.2K baud
Casing (H x W x D) 25 x 70 x 108mm (0.98 x 2.76 x 4.25")
IP rating 20
Mounting The Multicom can be used without mounting,
however optional mounting brackets are available for
applications that require the unit to be xed in place.
DIN rail 35mm. Requires MC -DR bracket (optional )
Wall mount Requires MC -WM wall bracket (optional)
Accessories (Optional)
Power adaptor, 250V/5V 1A with USB connector (Order
code MC-PWR-ADP)
Wall mount bracket (order code MC -WM)
2
LED Indicators
PWR lights up when power is
supplied to the Multicom USB
5V DC port via your computer’s
USB port or the external power
adaptor.
USB lights up when a USB or
power cable is connected to
the Multicom USB 5V DC port,
and there is no RS232 cable connected to the Multicom
RS232 DB9 port. This indicates that the Multicom converter
is ready to convert from USB RS232/485/422.
RS232 lights up when an RS232 cable is connected to the
Multicom RS232 DB9 port. (Please note that the USB cable
or external power adaptor must also be connected, as this
supplies power to the unit.)
RX lights up when the Multicom converter is receiving data
from the RS232 RJ11 or RS485/422 ports.
TX lights up when Multicom converter is transmitting data
to the RS232 RJ11 or RS485/422 ports.
3
Port Pinouts
USB Type B Socket
Pin 1 + 5V
Pin 2 Data –
Pin 3 Data +
Pin 4 GND
RS232 DB9 Socket
Pin 1 No Connection
Pin 2 Tx
Pin 3 Rx
Pin 4 No Connection
Pin 5 GND
Pin 6-9 No Connection
RS232 RJ11
Pin 1 No Connection
Pin 2 Tx
Pin 3 Rx
Pin 4 No Connection
Pin 5 GND
Pin 6 No Connection
RS485/422 5 -pin Screw
Terminal
› RS422:
Pin 70 Tx –
Pin 71 Tx +
Pin 72 Rx –
Pin 73 Rx +
Pin 74 GND
› RS485:
Pin 70 Tx –/Rx –
Pin 71 Tx +/Rx +
Pin 72-3 No Connection
Pin 74 GND
4
Installing The Driver &
Multicom Con gurator Program
Double click on the Multicom .msi installer and
follow the on-screen instructions. This will install
the Multicom Con gurator and driver.
The Multicom Con gurator program is used to change
the default baud rate, bits or parity of the the Multicom
converter to convert from RS232 RS485/422, and to
install the driver/comport for the USB interface.
Using the Multicom Con gurator to Check the
COM Port Number
The Multicom Con gurator can be used to check the COM
port number a er connecting the Multicom converter to
your computer:
Double click the Multicom Con gurator icon on your
computer’s desktop to launch the program.
If a Multicom converter
is already connected
to your computer,
then the program will
detect it automatically
and display the COM
port number as shown
(right)
If you have not yet
connected a Multicom converter to your computer, then
the program will display a message which reads ‘No devices
were discovered’.
5
At this point you may
connect a Multicom
converter and then click
‘Search again’ to nd
the COM port number.
If you have more than
one Multicom converter
connected to your
computer, then the
program will nd all of
them and display their
COM port numbers in a
drop down list as shown
(right).
Converting from USB RS232/485/422
No con guration is necessary when using the Multicom to
convert from USB RS232 or RS485/422. Once you have
installed the driver and connected the Multicom to one
of USB ports on your computer, you may start to use it
immediately.
The Multicom converter detects which cables are plugged
in, so it is important to disconnect all cables that you are
not using.
6
When converting from USB RS485/422, the RS232 serial
cable must not be connected to the RS232 RJ11 port, as this
will prevent conversion to RS485/422.
Please check the LED indicators before starting your
transmission. If the USB LED is o but the RS232 LED is on,
disconnect the RS232 cable from the RS232 DB9 port on the
Multicom converter.
Converting from RS232 RS485/422
You need to use the Multicom Con gurator program to set
the Baud rate on the Multicom converter to your desired
value before starting any transmission. Once the Baud rate
is set, it will be saved until you set it again. The factory
default setting is 9600 Baud.
Please note that the Multicom converter must be powered
(via your computer’s USB port or the external power
adaptor) in order to convert from RS232 RS485/422.
Double click the Multicom Con gurator icon on your
computer’s desktop to launch the program.
A er the program is
red up, it will nd the
new COM port number,
which is used to
con gure the Multicom
converter.
For more information
on detecting your COM
port number, see p5.
7
Choose your desired
Baud rate from the
‘Select Baud Rate’ drop
down list, then click
‘Set’.
A message will be
shown at the bottom of
the window to indicate
whether the operation
was successful or not.
Once the Baud rate is set successfully, you can start your
transmission. The Multicom converter may be shi ed to any
other computer or device which has standard USB ports,
or it may be connected to the external power adaptor to
convert between RS232 and RS485/422 at your desired
Baud rate.
To check the current
Baud rate con guration,
click ‘Read Current
Setting’. A message will
appear at the bottom of
the window.
When converting from RS232 RS485/422, the RS232
serial cable must not be connected to the RS232 RJ11 port,
as this will just pass the data from RS232 to RS232.
De ne Instruments
New Zealand (Head O ce) +64 (9) 835 1550 de neinstruments.co.nz
United States (Dallas, TX) (214) 926 4950
South Africa (JHB) 087 945 2700
de neinstruments.com
de neinstruments.co.za
MULTICOM -MAN-15V04 (1006)Copyright © 2015 De ne Instruments
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