Westermo EDW-120 User manual

©Westermo Teleindustri AB
www.westermo.com
Serial Adapter
User Guide
6616-2211
EDW-120

26616-2211
Legal information
The contents of this document are provided “as is”. Except as required by applicable
law, no warranties of any kind, either express or implied, including, but not limited to,
the implied warranties of merchantability and fitness for a particular purpose, are made
in relation to the accuracy and reliability or contents of this document. Westermo
reserves the right to revise this document or withdraw it at any time without prior
notice.
Under no circumstances shall Westermo be responsible for any loss of data or income
or any special, incidental, and consequential or indirect damages howsoever caused.
More information about Westermo can be found at the following Internet address:
http://www.westermo.com

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6616-2211
Safety
Before using this unit:
Read this manual completely and gather all information on the unit. Make sure
that you understand it fully. Check that your application does not exceed the safe
operating specifications for this unit.
Hazardous voltage may occur within this unit when connected to power supply
or TNV circuits.
Prevent access to hazardous voltage by disconnecting the unit from power supply
and all other electrical connections.
Prevent damage to internal electronics from electrostatic discharges (ESD) by
discharging your body to a grounding point (e.g. use of wrist strap).
Before installation:
This unit should only be installed by qualified personnel.
This unit should be built-in to an apparatus cabinet, or similar, where access is
restricted to service personnel only.
The power supply wiring must be sufficiently fused, and if necessary it must be
possible to disconnect manually from the power supply. Ensure compliance to
national installation regulations.
Branch circuit protection (fuse) is required for this unit with rating not
exceeding 20 A.
This unit uses convection cooling. To avoid obstructing the airflow around the
unit, follow the spacing recommendations (see Installation section).
Care recommendations
Follow the care recommendations below to maintain full operation of unit and to fulfil
the warranty obligations.
This unit must not be operating with removed covers or lids.
Do not attempt to disassemble the unit. There are no user serviceable parts inside.
Do not drop, knock or shake the unit, rough handling above the specification may cause
damage to internal circuit boards.
Do not use harsh chemicals, cleaning solvents or strong detergents to clean the unit.
Do not paint the unit. Paint can clog the unit and prevent proper operation.
Do not expose the unit to any kind of liquids (rain, beverages, etc). The unit is not water-
proof. Keep the unit within the specified humidity levels.
Do not use or store the unit in dusty, dirty areas, connectors as well as other mechanical
part may be damaged.
If the unit is not working properly, contact the place of purchase, nearest Westermo dis-
tributor office or Westermo Tech support.
Maintenance
No maintenance is required, as long as the unit is used as intended within the specified
conditions.
!
!

46616-2211
General
This unit is intended for use in Zone 2 hazardous location only.
Marking
II 3 G
Ex nA IIC T4 Gc
SPECIAL CONDITION
WARNING – DO NOT SEPARATE WHEN ENERGIZED
ATEX Information (Applicable for EDW-120 Ex only)
Indicate that this unit complies with relevant European standards that are
harmonised with the 94/9/EC Directive (ATEX).
II
Equipment group II.
This unit can be installed in all places with an explosive gas atmosphere other
than mines susceptible to firedamp
3
Equipment category 3.
A category is the classification according to the required level of protection.
This unit ensures the requisite level of protection during normal operation and
is intended for use in areas in which explosive atmosphere caused by gases,
vapours, mists, or dust mixtures are unlikely to occure or, if they do occure, are
likely to do so only infrequently and for a short periode only.
GIndicates protection concerning explosive atmospheres caused by gases,
vapours or mists (G).
Ex Indicates that this unit is in conformity with relevant European Ex standard(s).
nA
Type of protection used.
This unit is a non-sparking device "nA" which is constructed to minimize the
risk of occurence of arcs or sparks capable of creating an ignition hazard during
conditions of normal operation.
IIC Gas group, a typical gas i hydrogen.
T4
Temperature class T4 (T4 = 135°C).
This unit is classified in accordance with its maximum surface temperature
(external and internal).
Gc
Equipment protection level Gc (EPL Gc).
Equipment for explosive gas atmospheres, having a "enhanced" level of protec-
tion, which is not a source of ignition in normal operation and which may have
some additional protection to ensure that it remains inactive as an ignition
source in the case of regular expected occurences. EPL Gc are analogous to the
ATEX Categories (Category 3 G = EPL Gc).
SPECIAL
CONDITION
This unit has a special condition of use.
The special conditon for safe use contains safety related information that is
necesarry for the correct installation and safe use.

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Ratings
Power 12 – 48 VDC; 200 mA
Ambient temperature –25ºC ≤ Ta ≤ +70ºC
Ingress protection (IP) IP21
Maximum surface temperatur 135ºC (temperature class T4)
Safety Control Drawing
Position Descripton Input / Output values
1 In/Out / TD+
U = ± 1 V (4μV/s)
I = ± 20 mA
Data rate:
10/100 Mbit/s
2 In/Out / TD–
3 In/Out / RD+
4 Not connected
5 Not connected
6 In/Out / RD–
7 Not connected
8 Not connected
Galvanically isolated via signal transformer and capacitively
isolated to signal ground through a 3 kV 470 pF capacitor.
See user manual for proven transient protection.
Position Descripton Input values
1 In / Common Umin/max = 10 – 60 VDC
Imax = 300 mA max
Pmax = 3 W
2 In / +Voltage A
3 In / +Voltage B
4 In / Common
See section Type tests and environmental conditions in this
user manual for proven transient protection.
1234 1234
Degree of protection IP 21
Ambient temperature –25°C to +70°C
Installation spacing Minimum 25 mm above / below
Minimum 10 mm left / right
Position Descripton Input /Output values
1 Not connected (DCD)
Umax = ± 12 Vpk
Imax = ± 60 mA
Data rate:
0.3 – 115.2 kbit/s
2 In / Received Data (RD)
3 Out / Transmitted Data (TD)
4 Out / Data Terminal Ready (DTR)
5 – / Signal Ground (SG)
6 In / Data Set Ready (DSR)
7 Out / Request To Send (RTS)
8 In / Clear To Send (CTS)
9 Not connected (RI)

66616-2211
SPECIAL CONDITION FOR SAFE USE
Ambient temperature:
This unit is designed for use in extreme ambient temperature conditions as follows:
–25ºC ≤ Ta ≤ +70ºC
Installation in an apparatus cabinet:
This unit requires installation in an Ex certified apparatus cabinet suitable for the area of use and
providing a degree of protection of at least IP54.
Resistance to impact:
This unit requires installation in an apparatus cabinet where adequate resistance to impact is
provided by the apparatus cabinet. See "Installation in an apparatus cabinet" above for requirements
on the external apparatus cabinet.
Resistance to light:
This unit requires installation in an apparatus cabinet where it is protected from light
(for example daylight or light from luminaires).
See "Installation in an apparatus cabinet" above for requirements on the external apparatus cabinet.
Secureness of plugs:
When this unit is installed in an explosive atmospheres, all connectors must be mechanically secured
to prevent loosening.
Conductor temperature:
When this unit is installed in locations with high ambient temperature, special precautions shall be
taken upon the choice of external conductors and the temperature rating of the conductor(s).
Directive 94/9/EC alongside with other directives:
Directive 2004/108/EC (EMC) applies and to assure a safe performance of this unit under the scope
of Directive 94/9/EC, refer to the electromagnetic immunity level specified under "Type tests and
environmental conditions" in this manual.
Standards and date of compliance
EN 60079-0 and EN 60079-15
2011-01-21

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Agency approvals and standards compliance
FCC Part 15.105
Notice:
This equipment has been tested and found to comply with the limits for a
Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference in which case the
user will be required to correct the interference at his own expense.
EN 55022 Notice: This is a class A product. In a domestic environment this product may cause
radio interference in which case the user may be required to take adequate
measures.
Type Approval / Compliance
EMC EN 61000-6-2, Immunity industrial environments
EN 61000-6-4, Emission industrial environments
EN 55024, Immunity IT equipment
EN 50121-4, Railway signalling and telecommunications apparatus
IEC 62236-4, Railway signalling and telecommunications apparatus
Safety UL/CSA/IEC/EN 60950-1, IT equipment*
EN 60950-1, IT equipment**
ATEX** EN 60079-0 and EN 60079-15
* Applicable for EDW-120 only
** Applicable for EDW-120 Ex only

86616-2211
Westermo Teleindustri AB
Declaration of conformity
Org.nr/
Postadress/Postal address
Tel.
Telefax
Postgiro
Bankgiro
Corp. identity number
Registered office
S-640 40 Stora Sundby 016-428000 016-428001 52 72 79-4 5671-5550 556361-2604 Eskilstuna
Sweden Int+46 16428000 Int+46 16428001
The manufacturer Westermo Teleindustri AB
SE-640 40 Stora Sundby, Sweden
Herewith declares that the product(s)
Type of product Model Art no
Ethernet to serial adapter EDW-100 3616-0020
EDW-100 EX 3616-5020
EDW-120 3616-0010
EDW-120 EX 3616-5010
is in conformity with the following EC directive(s).
No Short name
2004/108/EC Electromagnetic Compatibility (EMC)
94/9/EC
1
Equipment Explosive Atmospheres (ATEX)
References of standards applied for this EC declaration of conformity.
No Title Issue
EN 55022 Information technology equipment – Radio disturbance characteristics –
Limits and methods of measurement
2006
+A1:2007
EN 55024 Information technology equipment – Immunity characteristics
Limits and methods of measurement
1998 + A1:2001
+ A2:2003
EN 50121-4 Railway applications – Electromagnetic compatibility – Emission and
immunity of the signalling and telecommunications apparatus
2006
EN 61000-6-1 Electromagnetic compatibility – Immunity for residential environments 2007
EN 61000-6-2 Electromagnetic compatibility – Immunity for industrial environments 2005
EN 61000-6-3 Electromagnetic compatibility – Emission for residential environments 2007
EN 61000-6-4 Electromagnetic compatibility – Emission for industrial environments 2007
EN 60079-0
1
Explosive atmospheres – Equipment, General requirements 2009
EN 60079-15
1
Electrical apparatus for explosive gas atmospheres – Construction, test
and marking of type of protection “n” electrical apparatus
2005
The last two digits of the year in which the CE marking was affixed: 11
Pierre Öberg
Technical Manager
13
th
January 2011
1
Only applicable for EDW-100 EX and EDW-120 EX.
Declaration of Conformity, EDW-120 / EDW-120 Ex

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Type tests and environmental conditions
Electromagnetic Compatibility
Phenomena Test Description Test levels
ESD EN 61000-4-2 Enclosure contact ± 6 kV
Enclosure air ± 8 kV
RF field AM
modulated
IEC 61000-4-3 Enclosure 20V/m 80% AM (1 kHz), 80 – 2 000 MHz
12V/m 80% AM (1 kHz), 2 000 – 2 700 MHz
RF field 900 MHz ENV 50204 Enclosure 20 V/m pulse modulated 200 Hz, 900 ± 5 MHz
Fast transient EN 61000-4-4 Signal ports ± 2 kV
Power ports ± 2 kV
Surge EN 61000-4-5 Signal ports
unbalanced
± 2 kV line to earth, ± 2 kV line to line
Signal ports balanced ± 2 kV line to earth, ± 1 kV line to line
Power ports ± 2 kV line to earth, ± 2 kV line to line
RF conducted EN 61000-4-6 Signal ports 10 V 80% AM (1 kHz), 0.15 – 80 MHz
Power ports 10 V 80% AM (1 kHz), 0.15 – 80 MHz
Pulse magnetic field EN 61000-4-9 Enclosure 1000 A/m, 6.4 / 16 μs pulse
Voltage dips
and interruption
EN 61000-4-29 DC power ports 10 & 100 ms, interruption
10 ms, 30% reduction
10 ms, 60% reduction
+20% above & –20% below rated voltage
Radiated emission EN 55022 Enclosure Class A
FCC part 15 Class A
Conducted emission EN 55022 DC power ports Class B
Dielectric strength EN 60950 Signal port to other
isolated ports
1.5 kVrms 50 Hz 1 min
Power port to other
isolated ports
2 kVrms 50 Hz 1 min
Environmental
Temperature Operating –25 to +70ºC
Storage & Transport –40 to +70ºC
Maximum surface
temperature
135ºC (temperature class T4)
Humidity Operating 5 to 95% relative humidity
Storage & Transport 5 to 95% relative humidity
Altitude Operating 2 000 m / 70 kPa
Service life Operating 10 year
Vibration IEC 60068-2-6 Operating 7.5 mm, 5 – 8 Hz
2 g, 8 – 500 Hz
Shock IEC 60068-2-27 Operating 15 g, 11 ms
Packaging
Enclosure
EDW-120 UL 94 PC / ABS Flammability class V-1
EDW-120 Ex – Cabelec CA6141 –
Dimension
W x H x D
35 x 121 x 121 mm
Weight 0.2 kg
Degree of protection IEC 529 Enclosure IP 21
Cooling Convection
Mounting Horizontal on 35 mm DIN-rail

10 6616-2211
Introduction
The EDW-120 is an Industrial Ethernet to serial adapter. The serial interface has two
parallel RS-232 ports. The Ethernet interface is 10/100BASE-T and supports the
following networking protocols: TCP, UDP, ICMP, IGMP, HTTP, ARP.
Two EDW-120 can be used to provide a serial point to point link over an Ethernet
network using either UDP or TCP. When using TCP the EDW-120 can be configured
as client or server.
Each unit passes data from
its serial interface to the
serial interface of the other
unit.
This enables long distance
serial communication using
pre-existing networks.
When EDW-120 is used
with the UDP protocol it
is also possible to com-
municate one to many
(e.g. master to multiple
slaves), by using a broad-
cast address or multicast
addressing
Network
Serial
Device
Configured
as UDP- or
TCP-server
Configured
as UDP- or
TCP-client
Serial
Device
Serial
Master
Serial
Slave
Serial
Slave
Serial
Slave
Network
Broadcast
Multicast
EDW-120 can also provide a remote serial interface for
a computer connected through a TCP/IP network using
a Virtual IP software.
A COM port redirector or customer written software
can be used to create virtual COM ports. This software
will redirect data, originally sent to a local COM port, to
the remote serial interface of the EDW-120. No changes
are required on the computer application software.
Together with the unit Virtual IP is delivered, this soft-
ware enables connection of 255 COM ports to virtual IP
addresses.
Application software
Data to / from COM3
Data to / from COM4
Data to / from COM5
Data to / from COM255
COM port
redirector software
Network
COM3
COM4 COM5
COM255
Network Interface

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On the network side the EDW-120 has two serial server applications implemented at
each RS-232 port. The servers listen at different local TCP ports. Each serial server
application allows remote clients to connect. When a connection is established any
data sent to the server are transmitted at the corresponding serial interface. CH1 or
CH2. Vice versa data received at CH1 or CH2 are packed into a frame and sent to the
remote client. The serial channels are possible to configure individually (e.g. individual
packing algorithm and data format).
It is also possible to direct the two serial servers to the same serial channel, useful for
redundant SCADA.
TCP/IP
TCP/IP
Controller 1
(remote client 1)
Primary SCADA
controller 1
Secundary SCADA
controller 1
Secundary SCADA
controller 2
Primary
SCADA
controller 2
Communicating
with controller 1
Communicating
with controller 2
Communicating
with controller 1
Communicating
with controller 2
Controller 2
(remote client 2)
CH 1
CH 1
CH 2
CH 2

12 6616-2211
For more information on applications and technical data visit www.westermo.com.
The Web tool also includes an integrated help where all functions and modes are
described in details.
More help can be found inside the web tool and the "?" button on
each configuration page

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Product description
The EDW-120 is an industrial Ethernet to serial interface adapter designed for harsh
environments. It allows serial devices to interface through a new or existing Ethernet
network. The unit can support two RS-232, running at up to 115.2 kbit/s. Ethernet
connection is via a standard RJ-45 port with MDI/MDI-X.
The protocols used for network communication is UDP or TCP. This allows the
EDW-120 to be setup as a TCP-server or -client as well as an UDP unit.
Configuration of the unit
The EDW-120 can be easly configured via the onboard Web based configuration tool,
alternatively some functions can also be set by hardware DIP-switches on the PCB.
It is also possible to monitor and override the hardware settings by using the Web tool, if
that is done this is indicated by the RC LED (Remotely Controlled).
The serial port properties such as data rate, flow control and data bits etc. are config-
ured by the Web based configuration tool.

14 6616-2211
The local IP address of the unit can be configured by using a terminal program
such as Windows Hyper Terminal.
New Connection - Hyper Terminal
File
'EDW-120 IP CONFIGURATION'
Firmware : 4100-9000
-- Current IP configuration --
Local IP address : 169.254.100.100
Gateway address : 169.254.100.1
Subnet Mask address : 255.255.255.0
Press <Return> to select the value shown in braces,
or enter a new value.
Local IP address [169.254.100.100]?
Edit View Call Transfer
Connected 0:01:33 VT100 9600 8-N-1 NUM
SCROLL CAPS Capture Print echo
Help
Unique features
… Packing algorithm that enables the user to decide how and when the serial data
should be encapsulated in a TCP or UDP data frame and sent out on the network.
… Galvanic isolation, this feature eliminate communication errors. One of the most
common errors is caused by potential differences between interconnected equipment.
… Redundant power supply with wide input range.
Theses feature along with the high EMC immunity enables the device to be used in
projects where a high degree of reliability is required.
Diagnostic information
The first level of diagnostic information is the status indicated by the LED´s.
LED’s is described on page 25.

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Getting started
IP Address
The default IP address of the EDW-120 when delivered is 169.254.100.100
Default port 9000 (A: RS-232)
Default port 9001 (B: RS-232)
Default gateway 169.254.100.1
IP address configuration
The IP address is configurable by the Web tool and/or by using a terminal program.
Below is an description of how to configure the IP address by using a terminal program.
1. Connect the serial A: RS-232 interface to a terminal program with settings:
Data rate: 9600 bit/s
Data bits: 8
Stop bits: 1
Parity: None
Flow control: None
EDW-120
DTE
3
2
7
8
6
5
1
4
9
3
2
7
8
6
5
1
4
9
Computer
DTE
Note! When connecting EDW-120 to a
Comport in a computer you have to use
a “null-modem” cable, because
both EDW-120 and the computer
interface is DTE.
ON
1 2 3 4 5 6 7 8
The Telnet diagnostic service provide the user with information such as UDP- or TCP
mode, connected or listening state (TCP) etc.
C:\WINDOWS\System32\telnet.exe
Westermo EDW-120
login: edw120
Password: ******
Hello edw120
Welcome to Westermo EDW-120 diagnostics service
(TCP Server): Listening for TCP connection on port: [9000]...
2. Setting DIP S1:1 to ‘On’ and power-up the
EDW-120 this will enable the local IP address
to be configured via serial interface.
Once connected with the terminal program you can change the IP address, Gateway
address and Subnet Mask according to the picture below:

16 6616-2211
Username and Password for configuration
The EDW-120 is username and password protected. These are used when connecting
with Web browser during configuration and with Telnet for diagnostics.
Default username: edw120
Default password: edw120
Browser Login
The Webtool has two different login accounts.
The first is the EDW-120 Guest account that only allows the user to read the units set-
tings but he has no rights to configure the unit in any way.This accounts Username and
Password are fixed and aren’t configurable
EDW-120 Guest
Username: guest
Password: guest
or
Username: anonymous
Password: anonymous
EDW-120 Config
The second account is the EDW-120 Config that gives the user rights to configure the
unit with new parameter values.This accounts Username and Password can also be
configured when the user are logged in as EDW-120 Config. Default Username and
Password are listed below.
Default Username: edw120
Default Password: edw120
3. Set DIP S1:1 to ‘Off’ and power cycle the EDW-120.
4. The unit is now ready for a complete configuration by the Web tool.
New Connection - Hyper Terminal
File
'EDW-120 IP CONFIGURATION'
Firmware : 4100-9000
-- Current IP configuration --
Local IP address : 169.254.100.100
Gateway address : 169.254.100.1
Subnet Mask address : 255.255.255.0
Press <Return> to select the value shown in braces,
or enter a new value.
Local IP address [169.254.100.100]?
Edit View Call Transfer
Connected 0:01:33 VT100 9600 8-N-1 NUM
SCROLL CAPS Capture Print echo
Help
See also configura-
tion by Web Tool
on page 18

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Restore Factory default settings
Note! This will clear your customized settings.
The factory default settings can be restored using DIP-switch S1:2.
1. Force this to ‘On’ and Power-up the EDW-120 for at least 5 seconds.
2. Force the DIP-switch to ‘Off’ and power cycle the EDW-120.
The EDW-120 now contains the factory default settings.
Note ! If the default address of the unit is valid on the connected network it is possible
to access the unit directly from a browser.
ON
1 2 3 4 5 6 7 8

18 6616-2211
Configuration by Web Tool
The EDW-120 includes an easy-to-use Web con-
figuration tool. The Web tool is very intuitive and
includes useful help information for the configura-
ble parameters.
Connect and login to the EDW-120 with the
EDW-120 Config account on the default IP address
and with default username- and password combi-
nation (or your customized if configured) using a
standard Web browser.
Use the Configuration Wizard to set all param-
eters then press the button "Program Unit" to
write the parameters into the unit or save the parameters to a file.
Serial/IP® and Telnet Options
EDW-120 are bundled with Serial/IP® virtual Com port director software. The Serial/IP®
use portions of the “Telnet Environment Option” (RFC1572) to verify that it is con-
nected to an EDW-120.
The EDW-120 has partial support for the “Telnet Com Port Control Option” (RFC2217).
This makes it possible to remotely (on the fly) change serial port parameters. Currently
supported parameters are baud rate, parity, number of data bits and number of stop bits.
As default the Telnet Options are disabled. If the Serial/IP® software is to be used, the
Telnet options must be enabled in the web tool. This parameter can be found on the
serial page.

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Diagnostics via Telnet
The EDW-120 provides the user with diagnostics information via a Telnet connection
on port 23.
Information presented to the user is:
… Operational mode (UDP, TCP-server or client)
… Operational status (Listening for connection (TCP server), connected to host
(TCP server or client), Attempting to connect (TCP client))
… The ‘Status’ LED on the EDW-120 will lit during Telnet session.
Below is an description of how to start a Windows Telnet session and get diagnostics
information from the EDW-120.
C:\WINDOWS\System32\telnet.exe
Welcome to Microsoft Telnet Client
Escape Character is 'CTRL+]'
Microsoft Telnet> o 169.254.100.100
1. Start a Telnet session.
2. Connect to EDW-120 by typing ‘o 169.254.100.100’
or the configured IP address of the EDW-120.
3. Login using default username and password
(or your customized settings if configured).
Application modes
The EDW-120 can be setup for use in one of three different application modes:
… TCP Server … TCP Client … UDP

20 6616-2211
Short description of TCP and UDP
User Datagram Protocol (UDP)
UDP provides a connectionless datagram service. This means that the arrival of data-
gram’s or data packets is not controlled and the reliability of the communication is the
responsibility of the application layer protocol. In this way UDP is a simpler method of
communication than TCP. As data is sent and received without any established connection
the data transfer is more efficient and often faster. UDP is therefore used in applications
that require efficient use of the bandwidth and also have a higher level protocol to handle
lost data.
Transmission Control Protocol (TCP)
TCP is a connection-oriented delivery service. Connection oriented means that a con-
nection must be established before hosts can exchange data. An acknowledgement is
used to verify that the data was received by the other host. For data segments sent, the
receiving host must return an acknowledgement (ACK). If an ACK is not received, the
data is retransmitted. Flow-control between the hosts is managed by TCP. For larger
amounts of data that have to be split between packets TCP provides a method for reli-
ably reassembling the data in the correct order. Because of the requirement to establish a
connection and acknowledge transmissions, TCP takes longer time to transmit data than
UDP and uses more bandwidth.
When delivered the EDW-120 is in TCP server mode.
TCP Server mode
This mode makes it possible to accept incoming TCP connections attempts to the
EDW-120 from an TCP client e.g. a EDW-120 in TCP client mode. Other examples
of TCP clients: Telnet client establishing a raw TCP connection, COM-port redirector
software running on a Windows PC.
TCP Client mode
This mode makes it possible to establish a TCP connection to a remote TCP server e.g.
a EDW-120 in TCP Server mode.
DSR signal rising or a powering up the unit will trigger the EDW-120 to make an
connection attempt to the specified server depending on configuration.
UDP mode
UDP is a connection less protocol sending datagram’s i.e. there are less overhead traffic
compared to TCP and no acknowledgement packets will be sent between the peer’s
during communication.
Using UDP will enable the EDW-120 to send and listen to broadcast- and multicast
messages.