User`s guide
The Radio Modem is fitted with a DC power socket for use with an external 
regulated 7-15VDC power source. The diagram below shows the power socket 
polarity. 
Power socket type and polarity. 
Contact your distributor if you require an appropriate regulated mains power 
supply to suit. 
Starting your computer 
Switch your computer on if it is not already running, and start your favorite 
communications application (such as Hyperteminal for Windows). The radio 
modems are factory set to a default serial baud rate of 9600 bps, 8 data bits, 1 
stop bit, no parity and no flow control. Ensure your communication application 
or remote terminal device is configured to these settings. Your radio modems 
are now ready for use. Default operating mode for the RMX232 is in point-to-
point mode. 
If you require different interface settings to the factory set defaults, you will 
need to refer to the later chapter covering the radio modem configuration 
commands. 
Powering up the Radio Modems 
Once power is applied to the DC Jack on the bottom of the RMX232 you should 
see a welcome message appear on the communications application display (as 
shown below). The displayed mode of operation will change to reflect the 
currently configured mode of the radio modem. 
RMX232-xxx UHF Radio Modem 
Firmware: V2.xxy 
Mode: Modem. Unit 0 at site 0 
(Disable startup message in setup) 
Signon message as displayed upon power-up 
As the signon message is provided purely as a diagnostic aid during initial 
connection and setup of the radio modem, it should be disabled from within the 
configurator before final commissioning. 
User’s Guide    Installation 2-2 










