Industrial Ethernet Extender


Westermo Ethernet extender technology based on SHDSL makes it possible to reuse many types of pre-existing copper cables which can lead to considerable financial savings when installing new systems. The Wolverine DDW-142 allows effective Ethernet networks to be created over long distances (up to 15 km (9.3 mi)) at data rates up to 15.3 Mbit/s on a single twisted pair cable. By using two pairs “bonded” this rate can be doubled up to 30.4 Mbit/s. The integral switch allows 2 Ethernet devices to be attached and an RS-232 port allows for a legacy piece of equipment to be incorporated into the IP network.

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The WeOS (Westermo Operating Systems) has been developed to allow cross platform and future proof solutions. WeOS can deliver unique security functionality for this class of product as well as allowing the DDW-142 to form part of a resilient multimedia ring network using the Westermo FRNT protocol or industry standard STP/RSTP. WeOS has been developed to provide industrial networking solutions and contains amazing serial connectivity capability – from being able to simulate an old AT modem, convert Modbus RTU to TCP or encapsulate serial data into an IP packet.

The DDW-142 is incredibly flexible and easy to use. A basic point to point or multidrop network can be created without the need for any kind of configuration. If however a more complex solution requires some kind of network configuration the Web based setup is simple to use. A CLI interface is also provided making the unit easy for networking professionals to quickly master. Once the system is configured an easy solution is also available for the maintenance engineer – USB backup and restore means that stored configurations can be automatically downloaded from a USB stick.

The DDW-142 is often used in applications on railways, roads or with utilities where failure could result in significant costs. All Westermo products are designed with high MTBF in mind to improve operational reliability and also give long service life. Even features like the SHDSL diagnostics and management allow indication of line degradation allowing planned maintenance. As the unit is designed for these applications Westermo also ensure that testing is carried out to ensure the unit can operate at extremes of temperature, EMC and vibration and still provide robust communications.



WeOS 100-software

Protocols and functionality
Serial port technologySerial Over IP (Serial Extender and Virtual Serial Port)
Modem Replacement
Modbus Gateway
Resiliency and high availabilityFast Reconfiguration of Network Topology (FRNT)
FRNT Link Health Protocol (FLHP)
IEEE 802.1D Spanning Tree Protocol (STP)
IEEE 802.1w Rapid STP (RSTP)
Layer 2 switchingIEEE 802.1Q Static VLAN and VLAN Tagging
IEEE 802.3x Flow Control
IGMPv2/v3 snooping
AVT Dynamic VLAN (Adaptive VLAN Trunking)
Management VLAN (Management Interface concept)
Static Multicast MAC filters
Layer 2 QoSIEEE 802.1p Class of Service
Classification: VLAN tag, VLAN ID, IP DSCP/ToS, Port ID
Layer 2 securityIEEE 802.1X Port Access Control
MAC Authentication
ManageabilityManagement tools
• Web interface (HTTP and HTTPS)
• CLI via console port and SSHv2 and Telnet
• Westermo IPConfig tool
• SNMPv1/v2c/v3
• Flexible management of configuration and log files
• Secure Copy (SCP)
• Local file management via HTTP, FTP, TFTP and SCP
• Load/save files from/to USB memory stick
Flexible alarm/event handling system
Syslog (log files and remote syslog server)
Digital I/O
Port Monitoring
SNTP (NTP client)
PPPoE client
DHCP client
DHCP relay agent (DHCP option 82)
SNMP MIB supportRFC1213 MIB-2
RFC2863 Interface MIB (ifXTable)
RFC2819 RMON MIB (etherStatsTable)
RFC4188 Bridge MIB
RFC4363 Q-BRIDGE MIB (dot1qVlan and dot1qVlanStaticTable)
RFC4836 MAU MIB (dot3IfMauBasicGroup and dot3IfMauAutoNegGroup)
RFC4133 Entity MIB (entityPhysical)
RFC3433 Entity Sensor MIB

Technical data


Product description
Article number3642-0300
Ports2 x 192 kbit/s to 15.3 Mbit/s (30.6 with bonding), SHDSL, 2-position detachable screw terminal.
1 x 300 bit/s to 115.2 kbit/s, RS-232, RJ-45.
1 x Digital I/O, 4-position detachable screw terminal.
1 x USB. 1 x 2.5 mm jack, Console.
DescriptionIndustrial Ethernet Extender
Warranty period5 Years
Reliability prediction
MTBF, operating437 000 h (MIL-HDBK-217F (Gb) 25°C)
Service life, operatingOperating, 10 years
EMC (Electromagnetic Compatibility)
EN 55024 + A1 + A2Electromagnetic compatibility - Immunity IT equipment.
EN 55022 +A1Information technology equipment.
Radio disturbance characteristics. Limits and methods of measurement.
EN 61000-6-1Immunity residential environments.
EN 61000-6-2Immunity industrial environments.
EN 61000-6-4Emission industrial environments.
EN 61000-6-3Emission residential, commercial and light-industrial environments.
FCC part 15Class A and Class B.
EN 50121-4Railway signalling and telecommunications apparatus.
IEC 62236-4Railway signalling and telecommunications apparatus.
EMC specifications
EN 61000-4-2, ESDEnclosure:
Contact: ± 6 kV
Air: ± 8 kV
EN 61000-4-4, fast transientsPower port, ± 2 kV
Ethernet ports, ± 2 kV
SHDSL ports, ± 2 kV
RS-232 port, ± 2 kV
Status out / Digital in, ± 2 kV
Earth port, ± 1 kV
EN 61000-4-5, surgePower port:
L-L: ±0.5 kV, 2 Ω, 18 μF
L-E: ±0.5 kV, 12 Ω, 9 μF
L-E: ±2 kV, 42 Ω, 0.5 μF
L-L: ±1 kV, 42 Ω, 0.5 μF
Ethernet ports, L-E: ±2 kV, 2 Ω
SHDSL ports, L-E: ±2 kV, 42Ω, 0.5 μF
RS-232 port, L-E: ±2 kV, 2 Ω
Status out / Digital in, L-E: ±2 kV, 42Ω, 0.5 μF
EN 61000-4-9, pulsed magnetic fieldEnclosure, 300 A/m
EN 61000-4-3, radiated RF immunityEnclosure:
20 V/m 80% AM, 1 kHz sine, 80 – 1000 MHz
12 V/m 80% AM, 1 kHz sine, 1000 – 2700 MHz
EN 61000-4-6, conducted RF immunityPower port, 10 V, 80% AM, 1 kHz sine; 0.15 – 80 MHz
Ethernet ports, 10 V, 80% AM, 1 kHz sine; 0.15 – 80 MHz
SHDSL ports, 10 V, 80% AM, 1 kHz sine; 0.15 – 80 MHz
RS-232 port, 10 V, 80% AM, 1 kHz sine; 0.15 – 80 MHz
Status out / Digital in, 10 V, 80% AM, 1 kHz sine; 0.15 – 80 MHz
Earth port, 10 V, 80% AM, 1 kHz sine; 0.15 – 80 MHz
EN 61000-4-29, voltage dips and interruptionDC Power port:
10, 20 and 5000 ms, interruption
500 ms, 30% reduction
200 ms, 60% reduction
+20 above & –20% below rated voltage
EN 55022, radiated RF emissionEnclosure, class B
FCC part 15, radiated RF emissionEnclosure, class B
EN 55022, conducted emissionPower port, class B
Ethernet ports, class B
FCC part 15, conducted emissionPower port, class B
SafetyEN 60950-1
EN 60950-1, dielectric strengthPower port to other isolated ports, 2000 Vrms 50 Hz 1 min
Ethernet ports to all other isolated ports, 1500 Vrms 50 Hz 1 min
RS-232 port to all other isolated ports, 1500 Vrms 50 Hz 1 min
SHDSL ports to all other isolated ports, 1500 Vrms 50 Hz 1 min
Status out / Digital in port to all other isolated ports,1500 Vrms 50 Hz 1 min
Temperature, operating–40 to +70ºC (–40 to +158ºF)
Temperature, storage–40 to +70ºC (–40 to +158ºF)
Humidity, operating5 to 95% relative humidity
Humidity, storage5 to 95% relative humidity
EnclosureEN 60950-1, Zinc (fire enclosure)
Dimensions (W x H x D)Without connectors, 52.5 x 100 x 92 mm
With connectors, 52.5 x 100 x 111 mm
Degree of protectionIP 40
MountingHorizontal on 35 mm DIN-rail
IEC 60068-2-6, vibrationOperating:
5 – 20 Hz: 2 m²/s³
20 – 500 Hz: – 3 dB/oct
3 axis = 3 * 30 min
IEC-60068-2-27, shockOperating:
6 ms 1000 m/s²
6 directions, 3 shocks/direction
IEC 60068-2-27, bumpOperating:
11 ms 100 m/s²
6 directions, 100 shocks/direction
Interface specifications, power
Rated voltage24 to 48 VDC
Operating voltage19 to 60 VDC
Rated current245 mA (405 mA) @ 24 VDC (with 500 mA USB load)
124 mA (200 mA) @ 48 VDC (with 500 mA USB load)
Rated frequencyDC
Inrush current10.6 mA²s @ 24 VDC
24.7 mA²s @ 36 VDC
42.4 mA²s @ 48 VDC
Startup current2 x Rated current
PolarityReverse polarity protected
Redundant power inputYes
Isolation toAll other
ConnectionDetachable screw terminal
Connector size0.2 – 2.5 mm² (AWG 24 – 13)
Connect the unit using at least 18 AWG (0.75 mm²) wiring
Shielded cableNot required
Interface specifications, RS-232
Electrical specificationEIA RS-232
Data rate300 bit/s to 115.2 kbit/s
Data format7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits
ProtocolTransparent, optimised by packing algorithm
Circuit typeSELV
Transmission range15 m / 49 ft
Isolation toPower, SHDSL, Ethernet
Galvanic connection toUSB, Console
ConnectionRJ-45 according to EIA-561
Shielded cableRecommended
Conductive housingYes
Number of ports1
Interface specifications, 10/100BaseTX
Electrical specificationIEEE std 802.3. 2005 Edition
Data rate10 Mbit/s, 100 Mbit/s, manual or auto
DuplexFull or half, manual or auto
Circuit typeTNV-1
Transmission rangeUp to 150 m, with CAT5e cable or better
Isolation toAll other
ConnectionRJ-45, auto MDI/MDIX
Shielded cableNot required, except when installed in Railway applications as signalling and telecommunications apparatus and located close to rails.
Conductive housingYes
Number of ports2
Interface specifications, console
Electrical specificationLVTTL/LVCMOS-level
Data rate115.2 kbit/s
Data format8 data bits, none parity, 1 stop bit, no flow control
Circuit typeSELV
Connection2.5 mm jack, use Westermo cable 1211-2027
Interface specifications, USB
Electrical specificationUSB 2.0 host interface
Data rateUp to 12 Mbit/s (full-speed mode)
Circuit typeSELV
Maximum supply current500 mA
ConnectionUSB receptacle connector type A
Interface specifications, I/O relay output
Maximum voltage / current60 VDC / 80 mA
Connect resistanceMax 30 Ω
Isolation toAll other
ConnectionDetachable screw terminal
Connector size0.2 – 2.5 mm² (AWG 24 – 13)
Interface specifications, I/O / Digital input
Maximum voltage60 VDC
Load current2 mA
Voltage levelsLogic one >12 V, Logic zero <1V
Isolation toAll other
ConnectionDetachable screw terminal
Connector size0.2 – 2.5 mm² (AWG 24 – 13)
Interface specifications, DSL
Electrical specificationITU-T G.991.2 Annex B
Data rate192 kbit/s to 30.6 Mbit/s with bonding
ProtocolEFM according to IEEE 802.3-2005
Transmission rangeAccording to ITU-T G.991.2 depending on line quality
Isolation toAll other
ConnectionDetachable screw terminal
Connector size0.2 – 2.5 mm² (AWG 24 – 13)
Shielded cableNot required
Number of ports2

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Industrial Ethernet Extender