User`s guide

Introduction 1-1
Chapter 1
Introduction
About this Manual
This manual has been written for the RMX232 range of low cost short range modems
license exempt radio modems.
A list of the Radio Modems currently covered by this manual is included in the
appendix:
The generic reference of RMX232 will be used throughout this manual when referring
to any one of the RMX232-xxx modem variants mentioned above. Specific
information relating to a specific radio modem type will be noted by using the full radio
modem name.
The RMX232 Radio Modem
The RMX232 Radio Modem provides the capability of a short range, reliable wireless
point-to-point and point-to-multipoint RF data communications link.
The RMX232 can be used in a variety of data communications applications that
require a simple to use invisible data link. The radio modem is designed to interface to
a variety of host devices. These devices include computers, PDA’s, personal
organisers, PLC’s, data loggers, SCADA devices and intelligent control & transducer
systems.
The serial data transferred over the radio link is not altered; the output serial data
stream is the same as the input serial data stream. The radio modems provide a two-
way data communications links, where each unit can accept serial data and also
output serial data.
The RMX232 radio modems are fully self-contained units, requiring only an external
7VDC to 15VDC power source to operate. The radio modules used in the radio
modems have been selected to meet the requirements of unlicensed operation in the
international ISM bands, and are therefore acceptable for use in many countries.
User’s Guide