www.cooperbussmann.com/wirelessresources
Cooper Bussmann 945U-E Wireless Ethernet Modem & Device Server User Manual
7
Rev Version 2.14
C
hapTEr
1 - INTrODUCTION
The 945U-E Wireless Ethernet Modem and Device Server is an industrial 802.11-compliant module that provides
wireless connections between Ethernet devices and/or Ethernet wired networks (LANs) and complies with relevant
IEEE 802.11 standards.
945U-E 802.11
630mW max power
945U-E-H
802.11 1000mW max power
The 945U-E is a Direct Sequence Spread Spectrum (DSSS) wireless transceiver that utilizes the unlicensed
900-MHz frequency band for communications. There are various channels and bandwidths available depending
on the country and their radio regulations. If operating in the North America you can choose from the following 9 x
1.25 MHz, 9 x 2.5 MHz, 4 x 5 MHz, 4 x 10 MHz or 2 x 20 MHz channels. If operating in Australia you can choose
from 4 x 1.25 MHz, 4 x 2.5 MHz, 3 x 5 MHz or 1 10 MHz channels, etc. For a more information see “3.1 Selecting a
Channel.”
The 945U-E unit also provides two serial connections as well as the Ethernet connections. It is possible to use all
three data connections concurrently, allowing the 945U-E to act as a Device Server. Wireless connections can be
made between serial devices and Ethernet devices. The 945U-E provides connection functionality between serial
“Modbus RTU” devices and Ethernet “Modbus TCP” devices. Appropriate driver applications will be required in the
host devices to handle other protocols.
The modem is VLAN compliant and capable of passing VLAN tagged frames by default. VLAN bridging and Routing
Modes are also available which will facilitate a number of different VLAN topologies.
The 945U-E has a standard RJ45 Ethernet connection which will operate at up to 100 Mbit/sec. The module will
transmit the Ethernet messages on the wireless band at rates between 1 and 54 Mbit/sec & 6 and 54 Mbit/sec
depending on model, band, encryption methods, and radio paths.
1.0 Network Topology
The 945U-E is an Ethernet device, and must be configured as part of an Ethernet network. Each 945U-E must be
configured as an:
• Access Point or Sta, Station, Client
Also needs to be configured as a:
• Bridge or Router
You can also connect to the 945U-E via an RS232 or RS485 serial port using serial server or point-to-point (PPP)
protocol. PPP allows the 945U-E to connect serial communications into the Ethernet network.
Figure 1 Network Topology
