Managed Industrial Ethernet Switch

Lynx DSS managed industrial ethernet switch is available in several versions, the L205-S1 is a device server with a layer 3 Managed Ethernet Switch, powered by the Westermo WeOS network operating system. Lynx DSS managed ethernet switch is the most compact and has the lowest power requirements in this class of device servers. Lynx DSS has 4 10/100 Mbit/s ports and one RS-232 port.


Lynx DSS is available in several versions, the L205-S1 is a device server with a layer 3 industrial Ethernet switch, powered by the Westermo WeOS network operating system. Lynx DSS is the most compact and has the lowest power requirements in this class of device servers. Lynx DSS has 4 10/100 Mbit/s ports and one RS-232 port. 

Lynx DSS is designed for simple use in industrial applications, from the robust DIN rail clip solution to the configurable fault contact and the industrial level dual power inputs. Only industrial grade components are used which gives the Lynx DSS an MTBF of 677,000 hours and ensures a long service life. A wide operating temperature range –40 to +70°C (–40 to +158°F) can be achieved with no moving parts or cooling holes in the case. Lynx DSS has been tested both by Westermo and external test houses to meet many EMC, isolation, vibration and shock standards, all to the highest levels suitable for heavy industrial environments and rail trackside application. 

WeOS has been developed by Westermo to allow us to offer cross platform and future proof solutions. WeOS can deliver unique IP security functionality for this class of product, for instance a Multiport DMZ can be constructed by utilising the internal port based firewall function or Modbus Gateway support. Remote secure access to a network can be provided using encrypted VPNs. For more WeOS functionality please see the WeOS datasheet.



✔ Compact Device Server Switch for legacy application
• RS-232 serial port
• Advanced WeOS Layer 3 functionality
• Low power consumption
✔ Designed for use in industrial applications
• Dual 19 – 60 VDC power input
• Highly configurable I/O contact
• Robust metal DIN rail housing
✔ Robust for long service life
• 677,000 hours MTBF to MIL-HDBK-217K
• –40 to +70°C (–40 to +158°F) with no moving parts
✔ Unique future proof industrial networking solutions
• Legacy IP solutions
• Network IP Security and remote access
• Multiple network resilience solutions
• Easy to use



Operating voltage  19 to 60 VDC
Rated current  140 mA (290 mA) @ 24 VDC (with 500 mA USB load)
70 mA (140 mA) @ 48 VDC (with 500 mA USB load)
Ethernet TX  4 x RJ-45, 10 Mbit/s, 100 Mbit/s
1 Serial ports  1 x RJ-45, RS-232, 50 bit/s – 115.2 kbit/s
Digital I/O  1 x 4-position detachable screw terminal
USB  1 x USB 2.0 host interface
Console  1 x 2.5 mm jack, use only Westermo cable 1211-2027
Operating  –40 to +70°C (–40 to +158°F)
Storage & Transport  –50 to +85°C (–58 to +185°F)
Agency approvals and standards compliance
EMC  EN 61000-6-1, Immunity residential environments
  EN 61000-6-2, Immunity industrial environments
  EN 61000-6-3, Emission residential environments
  EN 61000-6-4, Emission industrial environments
  EN 50121-4, Railway signalling and telecommunications apparatus
  IEC 62236-4, Railway signalling and telecommunications apparatus
Safety  UL/IEC/EN 60950-1, IT equipment
Marine  DNV GL rules for classification
Dimensional drawing
Dimensions (W x H x D)  52 x 100 x 101 mm (2.04 x 3.93 x 3.97 in)
Weight  0.7 KG
Degree of protection  IP40
Protocol and functionality  
WeOS standard - layer 3 protocols and functionality
Resilience and High Availability FRNTv0 ring topologies (rings, ring coupling and horseshoe topologies), IEEE 802.1D/802.1w (RSTP), IEEE 802.1AX/802.3ad Link
Aggregation (LACP and Static)
Layer 2 Switching IEEE 802.1D MAC Bridges, IEEE 802.1Q Static VLAN and VLAN Tagging, IEEE 802.1AB LLDP, IGMPv1/v2/v3 Snooping, Static Multicast
MAC filters
Layer 2 QoS IEEE 802.1p Class of Service with flexible classification (VLAN tag priority, IP DSCP/ToS, Port ID), Ingress and Egress Rate limiting
IP Host Services Static IP Address, DHCP Client, DNS Client, ZeroConf (mDNS and SSDP), NTP Client (NTPv4), IP Interfaces (Ethernet, VLAN, Loopback
and Blackhole)
Network Servers DHCP Server (including options 1, 3, 6, 12, 15, 42, 61 and 82), DHCP Relay Agent (including options 54 and 82), DNS Proxy Server (DNS
forwarder and Host records), NTP server (NTPv4)
Management Tools Westermo configuration tool WeConfig, Web interface (HTTP and HTTPS), Command Line Interface (CLI) via console port, SSHv2 and
Telnet, SNMPv2c/v3, Secure Copy (SCP) for remote file upload and download, Local file management (via HTTP, FTP, TFTP and SCP),
Load/save files from/to external memory, Configuration and Deployment using external memory, Tech support button, Flexible alarm and
event handling system, RFC5424/RFC3164 Syslog (log files and remote syslog server), Port monitoring
SNMP MIB Support (read-only) RFC 1213 MIB-2, RFC 2819 RMON MIB, RFC 2863 Interface MIB, RFC 3433 Entity Sensor MIB, RFC 3635 Ether-like Interface MIB, RFC
4133 Entity MIB, RFC 4188 Bridge MIB, RFC 4318 RSTP MIB, RFC4363 Q-BRIDGE MIB, RFC 4836 MAU MIB, IEEE 802.1AB LLDP MIB,
IP Host Services IP Interfaces (SSL, VPN, GRE)
IP Routing and VPN Static IP Routing, Floating Static Routes, Multinetting, Proxy ARP, Dynamic IP routing (OSPFv2 , RIPv1/v2), VRRPv2/v3, Static Multicast
Routing, Stateless NAT (1-1 NAT), SSL VPN (Client and Server, Certificate Authentication, Pre-shared Key (PSK) Point-to-Point Mode,
Layer-2 and Layer-3 VPN, Layer-2 VPN bridging, Address pool and address per CN, TLS Authentication), Generic Routing Encapsulation
SNMP MIB Support (read-only) RFC 2787 VRRPv2 MIB, RFC 6527 VRRPv3 MIB


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