User manual

WI-MOD-9-E Wireless Ethernet User Manual
WI-MOD-9-E Manual V1.9 Page 8
Chapter One INTRODUCTION
The WI-MOD-9-E Wireless Ethernet module provides wireless connections between Ethernet devices
or Ethernet wired networks (LAN’s). It has an internal 900MHz spread spectrum frequency hopping
wireless transceiver, which can be used without a radio license in many countries.
The WI-MOD-9-E has a standard RJ45 Ethernet connection which will operate at up to 100Mbit/sec.
The module will transmit the Ethernet messages on the wireless band at up to 200 Kbit/sec.
1.1 Network Topology
The WI-MOD-9-E is an Ethernet device, and must be configured as part of an Ethernet network.
Each WI-MOD-9-E must be configured as:
 an “Access Point” or a “Client”, and
 a “Bridge” or a “Router”.
You can also connect to the WI-MOD-9-E via a
RS232 or RS485 serial port using PPP (point-to-point)
protocol. PPP allows the WI-MOD-9-E to connect
serial communications into the Ethernet network.
Access Point vs Client
The Access Point unit acts as the “wireless master”
unit. The Access Point sets up the wireless links to
the Client units, and controls the wireless
communications. The first diagram shows two
Ethernet devices being linked. One WI-MOD-9-E is
configured as an Access Point and one as a Client -
in this example it doesn’t mater which unit is the
Access Point.
The second diagram shows an existing LAN being
extended using WI-MOD-9-E’s. In this example, the
Access Point should be configured at the LAN end -
although the wireless link will still work if the Client
is at the LAN end.
An Access Point can connect to multiple Clients. In
this case, the Access Point should be the “central”
unit.