ELPRO 245U-E User manual

ELPRO, 9/12 Billabong Street, Stafford Q 4053, Australia.
Tel: [phone] Fax: [phone] Email: [e-mail]
Web: www.elprotech.com
ELPRO 24 hour Support Help-line America (866) 7134409 Rest of the world [phone]
User Manual
245U-E Wireless Ethernet & Device
Server

245U-E Wireless Ethernet User Manual
Page 2 Dec 2009
Thank you for your selection of the 245U-E Wireless Ethernet Modem. We trust it
will give you many years of valuable service.
ATTENTION!
Incorrect termination of supply wires may
cause internal damage and will void warranty.
To ensure your 245U-E enjoys a long life,
Double check ALL your connections with
the user’s manual
before turning the power on.
CAUTION:
To comply with FCC RF Exposure requirements in section 1.1310 of the FCC Rules, antennas used with this device
must be installed to provide a separation distance of at least 20 cm from all persons to satisfy RF exposure
compliance.
DO NOT:
•operate the transmitter when someone is within 20 cm of the antenna
•operate the transmitter unless all RF connectors are secure and any open connectors are properly terminated.
•operate the equipment near electrical blasting caps or in an explosive atmosphere
All equipment must be properly grounded for safe operations. All equipment should be serviced only by a qualified
technician.

Chapter One 245U-E Wireless Ethernet
Man_245UE_V1.5.doc Page 3
FCC Notice:
This device complies with Part 15.247 of the FCC Rules.
Operation is subject to the following two conditions:
1) This device may not cause harmful interference and
2) This device must accept any interference received, including interference that may cause undesired operation.
This device must be operated as supplied by ELPRO Technologies. Any changes or modifications made to the device
without the written consent of ELPRO Technologies may void the user’s authority to operate the device.
End user products that have this device embedded must be installed by experienced radio and antenna personnel, or
supplied with non-standard antenna connectors, and antennas available from vendors specified by ELPRO. Please
contact ELPRO for end user antenna and connector recommendations.
Notices: Safety
Exposure to RF energy is an important safety consideration. The FCC has adopted a safety standard for human
exposure to radio frequency electromagnetic energy emitted by FCC regulated equipment as a result of its actions in
Docket 93-62 and OET Bulletin 65 Edition 97-01.
FCC Notice:
Part 15 – This device has been tested and found to comply with the limits for a Class B digital device, pursuant to
Part15 of the FCC rules (Code of Federal Regulations 47CFR Part 15). Operation is subject to the
condition that this device does not cause harmful interference.
Notice Any changes or modifications not expressly approved by ELPRO could void the user’s authority to
operate this equipment.
This Device should only be connected to PCs that are covered by either FCC DoC or are FCC certified.

245U-E Wireless Ethernet User Manual
Page 4 Dec 2009
Important Notice
ELPRO products are designed to be used in industrial environments, by experienced industrial engineering personnel
with adequate knowledge of safety design considerations.
ELPRO radio products are used on unprotected license-free radio bands with radio noise and interference. The
products are designed to operate in the presence of noise and interference, however in an extreme case, radio noise and
interference could cause product operation delays or operation failure. Like all industrial electronic products, ELPRO
products can fail in a variety of modes due to misuse, age, or malfunction. We recommend that users and designers
design systems using design techniques intended to prevent personal injury or damage during product operation, and
provide failure tolerant systems to prevent personal injury or damage in the event of product failure. Designers must
warn users of the equipment or systems if adequate protection against failure has not been included in the system
design. Designers must include this Important Notice in operating procedures and system manuals.
These products should not be used in non-industrial applications, or life-support systems, without consulting ELPRO
first.
1. A radio license is not required in some countries, provided the module is installed using the aerial and
equipment configuration described in the 245U-E Installation Guide. Check with your local distributor for
further information on regulations.
2. Operation is authorized by the radio frequency regulatory authority in your country on a non-protection basis.
Although all care is taken in the design of these units, there is no responsibility taken for sources of external
interference. Systems should be designed to be tolerant of these operational delays.
3. To avoid the risk of electrocution, the aerial, aerial cable, serial cables and all terminals of the 245U-E module
should be electrically protected. To provide maximum surge and lightning protection, the module should be
connected to a suitable earth and the aerial, aerial cable, serial cables and the module should be installed as
recommended in the Installation Guide.
4. To avoid accidents during maintenance or adjustment of remotely controlled equipment, all equipment should
be first disconnected from the 245U-E module during these adjustments. Equipment should carry clear
markings to indicate remote or automatic operation. E.g. "This equipment is remotely controlled and may
start without warning. Isolate at the switchboard before attempting adjustments."
5. The 245U-E module is not suitable for use in explosive environments without additional protection.
6. The 245U-E Operates using the same Radio frequencies and communication protocols as commercially
available off-the shelf equipment. If your system is not adequately secured, third parties may be able to gain
access to your data or gain control of your equipment via the radio link. Before deploying a system make sure
you have considered the security aspects of your installation carefully.

Chapter One 245U-E Wireless Ethernet
Man_245UE_V1.5.doc Page 5
Limited Lifetime Warranty, Disclaimer and Limitation of Remedies
ELPRO products are warranted free from manufacturing defects for the “serviceable lifetime” of the product. The
“serviceable lifetime” is limited to the availability of electronic components. If the serviceable life is reached in less
than three years following the original purchase from ELPRO, ELPRO will replace the product with an equivalent
product if an equivalent product is available.
This warranty does not extend to the following:
- Failures caused by the operation of the equipment outside the particular product's specification, or
- Use of the module not in accordance with this User Manual, or
- Abuse, misuse, neglect or damage by external causes, or
-Repairs, alterations, modifications undertaken other than by an authorized Service Agent.
ELPRO liability under this warranty is limited to the replacement or repair of the product. This warranty is in lieu of
and exclusive of all other warranties. This warranty does not indemnify the purchaser of products for any
consequential claim for damages or loss of operations or profits and ELPRO is not liable for any consequential
damages or loss of operations or profits resulting from the use of these products. ELPRO is not liable for damages,
losses, costs, injury or harm incurred as a consequence of any representations, warranties or conditions made by ELPRO
or its representatives or by any other party, except as expressed solely in this document.
GNU Free Documentation Licence:
Copyright (C) 2009 ELPRO Technologies.
ELPRO Technologies is using a part of Free Software code under the GNU General Public License in operating the
“245U-E ” product. This General Public License applies to most of the Free Software Foundation’s code and to any
other program whose authors commit by using it. The Free Software is copyrighted by Free Software Foundation, Inc.
and the program is licensed “As is” without warranty of any kind. Users are free to contact Elpro Technologies at the
following Email Address: [email protected] for instructions on how to obtain the source code used in the “245U-
E”.
A copy of the license is included in the section entitled "GNU Free Documentation License".

245U-E Wireless Ethernet User Manual
Page 6 Dec 2009
CONTENTS
CHAPTER ONE INTRODUCTION..............................................................................................................8
1.1 NETWORK TOPOLOGY .......................................................................................................................................8
1.2 GETTING STARTED QUICKLY...........................................................................................................................11
CHAPTER TWO INSTALLATION.............................................................................................................12
2.0 GENERAL ................................................................................................................................................12
2.1 ANTENNA INSTALLATION........................................................................................................................12
Dual Antenna Installations...............................................................................................................................12
Line-of-sight installations................................................................................................................................13
Antennas..........................................................................................................................................................13
Installation tips.................................................................................................................................................13
Dipole and Collinear antennas.........................................................................................................................14
Directional antennas. .......................................................................................................................................14
2.2 POWER SUPPLY .......................................................................................................................................15
2.3 SERIAL CONNECTIONS ............................................................................................................................15
RS232 Serial Port ............................................................................................................................................15
DB9 Connector Pinouts...................................................................................................................................16
RS485 Serial Port ............................................................................................................................................16
2.4 DISCRETE (DIGITAL)INPUT/OUTPUT.......................................................................................................18
CHAPTER THREE OPERATION...............................................................................................................19
3.0 START-UP................................................................................................................................................19
“Access Point” Start-up (245U-E-G)...............................................................................................................19
“Access Point” Start-up (245U-E-A)...............................................................................................................19
“Client” Start-up..............................................................................................................................................19
Link Establishment..........................................................................................................................................19
How a Link connection is lost .........................................................................................................................19
Roaming Clients ..............................................................................................................................................20
LED Indication ................................................................................................................................................20
3.1 SELECTING A CHANNEL ..........................................................................................................................21
802.11b/g (2.4GHz).........................................................................................................................................21
802.11a (5GHz) ...............................................................................................................................................22
Dynamic Frequency Selection (DFS)..............................................................................................................22
3.2 CONFIGURING THE UNIT FOR THE FIRST TIME..........................................................................................23
Default Configuration......................................................................................................................................23
Accessing Configuration for the first time.......................................................................................................23
Method 1 - Set PC to same network as 245U-E ..............................................................................................23
Method 2 - Set 245U-E Network address to match the local network ............................................................25
3.3 NETWORK CONFIGURATION....................................................................................................................27
Network Settings Webpage Fields...................................................................................................................28
Security Menu..................................................................................................................................................29
3.4 NORMAL OPERATION..............................................................................................................................30
Transparent Bridge Operation .........................................................................................................................30
Router Operation .............................................................................................................................................31
3.5 RADIO CONFIGURATION.........................................................................................................................31
Channel Selection............................................................................................................................................33
Radio Throughput............................................................................................................................................33
Throughput and Repeaters...............................................................................................................................34
3.6 DHCP CLIENT CONFIGURATION ............................................................................................................34
3.7 DHCP SERVER CONFIGURATION ............................................................................................................34
3.8 DNS SERVER CONFIGURATION...............................................................................................................34
3.9 SPANNING TREE ALGORITHM /REDUNDANCY ........................................................................................35

Chapter One 245U-E Wireless Ethernet
Man_245UE_V1.5.doc Page 7
3.10 COMPATIBILITY.......................................................................................................................................36
What Addresses are in a wireless Ethernet data frame? ..................................................................................36
Packets between AP and Client.......................................................................................................................36
3.11 MULTIPLE AP REPEATER MESH NETWORK.............................................................................................38
3.11.1 Example – Extending range using WDS ..............................................................................................39
3.11.2 Example - Roaming with WDS Access Points.....................................................................................40
3.11.3 Example – Adding Redundancy...........................................................................................................40
3.11.4 Example – WDS Routed Network........................................................................................................42
3.12 ROUTING RULES......................................................................................................................................45
3.13 WIRELESS MESSAGE FILTERING..............................................................................................................47
MAC Address Filter Configuration:................................................................................................................48
IP Address Filter Configuration:......................................................................................................................48
ARP Filter Configuration.................................................................................................................................49
3.14 SERIAL PORT CONFIGURATION ...............................................................................................................50
RS-232 PPP Server..........................................................................................................................................50
Serial Gateway.................................................................................................................................................51
Modbus TCP to RTU Gateway........................................................................................................................52
Serial Menu......................................................................................................................................................53
3.15 DIGITAL INPUT/OUTPUT..........................................................................................................................54
3.16 MODBUS I/O TRANSFER..........................................................................................................................54
3.17 MODULE INFORMATION CONFIGURATION...............................................................................................57
3.18 REMOTE CONFIGURATION.......................................................................................................................57
3.19 CONFIGURATION EXAMPLES ...................................................................................................................58
Setting a 245U-E to Factory Default Settings..................................................................................................58
Extending a wired network..............................................................................................................................58
Connecting two separate networks together....................................................................................................58
Extending range of a network with a Repeater hop.........................................................................................59
CHAPTER FOUR DIAGNOSTICS..............................................................................................................60
4.0 DIAGNOSTICS CHART..............................................................................................................................60
4.1 DIAGNOSTIC INFORMATION AVAILABLE.................................................................................................61
Connectivity.....................................................................................................................................................61
Statistics...........................................................................................................................................................62
Network Traffic Analysis ................................................................................................................................62
4.2 TESTING RADIO PATHS ...........................................................................................................................62
4.3 UTILITIES ................................................................................................................................................63
“Ping” ..............................................................................................................................................................63
”Ipconfig”........................................................................................................................................................65
”Route”............................................................................................................................................................65
CHAPTER FIVE SPECIFICATIONS ......................................................................................................67
APPENDIX A FIRMWARE UPGRADE................................................................................................69
APPENDIX B GLOSSARY...................................................................................................................70
APPENDIX C CHANNELS ..................................................................................................................74
APPENDIX D 802.11A TX POWER REGULATIONS..........................................................................76
APPENDIX E GNU FREE DOCUMENTATION LICENCE ...............................................................77

245U-E Wireless Ethernet User Manual
Page 8 Dec 2009
Chapter One INTRODUCTION
The 245U-E Industrial 802.11 Wireless Ethernet module provide wireless connections between Ethernet devices and/or
Ethernet wired networks (LAN’s). They each comply with their relevant IEEE 802.11 standard.
The 245U-E is available in a range of different models with different RF power and frequency options suitable for your
country’s local radio regulations.
245U-E-G 802.11 b/g 400mW max power
245U-E-A 802.11 a 400mW max power
The above models have the same functionality but use a different radio to communicate. The different radios do not
communicate with each other, e.g. a 245U-E-G will not communicate with a 245U-E-A. Only modules of the same
type are able to communicate wirelessly to each other.
Throughout this manual, any reference to “245U-E” refers to one of the above models.
The 245U-E-G model uses a 2.4GHz Direct Sequence Spread Spectrum (DSSS) wireless transceiver. Users pick a 20
MHz channel with 5 MHz channel spacing from the available 13 starting with the first channel centered on 2.412 GHz.
Some limitations depending on country, see Appendix C for channel selections.
Note that regulations in North America permit 11 x 2.4GHz channels and Europe permits 13 x 2.4GHz channels.
The 245U-E-A uses a 5 GHz Direct Sequence Spread Spectrum (DSSS) wireless transceiver and users must select
appropriate channel, transmit power, etc allowable in that country.
Please check with your ELPRO representative for the permitted channel usage in your country.
See Appendix C for channels selections.
The 245U-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 245U-E to act as a Device Server. Wireless connections can be made
between serial devices and Ethernet devices. The 245U-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 245U-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 rates between 1 and 54 Mbit/sec & 6 and 54 Mbit/sec depending
on model, band, encryption methods and radio paths.
1.1 Network Topology
The 245U-E is an Ethernet device, and must be
configured as part of an Ethernet network. Each
245U-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 245U-E via a RS232
or RS485 serial port using serial server or PPP (point-to-point) protocol. PPP allows the 245U-E to connect serial
communications into the Ethernet network.

Chapter One 245U-E Wireless Ethernet
Man_245UE_V1.5.doc Page 9
Access Point vs Client
The Access Point unit acts as the “wireless master” unit. The Access Point accepts and authorises links initiated but
client units, and controls the wireless communications.
Clients (Stations) are slave units and when connected to the Access Point becomes transparent ethernet link.
The first diagram shows a connection between two Ethernet
devices using 245U-E ethernet modems. In this example one
245U-E is configured as an Access Point and the other as a
Client - the Access Point can be connected.
The second diagram shows an existing LAN
being extended using 245U-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.
An Access Point could be used as a “Repeater”
unit to connect two 245U-E Clients, which do not
have direct reliable radio paths.
There is no “Special” repeater module, any 245U-
E can be a repeater and at the same time, can be
connected to an Ethernet devices or on a LAN
Multiple Access Points can be set-up in a “mesh”
network to provide multiple repeaters.
Ethernet Devices
Client
Access
Point
Client
Client
LAN

245U-E Wireless Ethernet User Manual
Page 10 Dec 2009
Client
Bridge
Access Point
Router
192.168.102.54
192.168.0.34
LAN A
192.168.102.17
192.168.102.53
LAN B
Bridge vs Router
Each 245U-E is configured with an IP address for the Ethernet side, and another for the wireless side.
A Bridge connects devices within the same
Ethernet network - for example, extending an
existing Ethernet LAN. For a Bridge, the IP
address for the wireless side is the same as the
Ethernet side.
A Router connects devices on different LAN’s.
The IP addresses for the Ethernet and wireless sides are
different. In this example, the wireless link is part of
LAN A, with the Client unit acting as a Router between
LAN A and LAN B.
Alternately, the Access Point could be configured as a Router - the wireless link is then part of LAN B.