Managed EN 50155 Backbone Routing Switch


The RFR-212-FB has been specially designed to allow the creation of a fault tolerant Ethernet backbone structure in trains. The dual bypass relay ensures that aggregated links between carriages are maintained, even if one carriage has a power failure. The Westermo WeOS operating system provides an extensive suite of IP networking standards allowing resilient and flexible networks to be created, meeting the needs of the rail market.

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As is critical for all equipment to be installed in rail vehicles, the RFR-212-FB has been externally tested across the com¬plete spectrum of standards required by EN 50155.

Westermo understand that systems on railcars are required by the EN 50155 standard to have a useful life of 20 years, so as well as using the highest quality components to deliver extended MTBF figures, we also implement features like the GORE-TEX® membrane in the IP65 enclosure to prevent water build up in the units.

The EN 50155 standard requires mandatory performance and isolation testing. Not only does Westermo meet these, we exceed them in order to meet the additional manufacturer requirements for train control. Westermo’s Swedish factory has been building Ethernet switches for the railcar market for many years now and understands the measures that are required to provide the highest quality manufactured solutions.




Protocols and functionality
Resiliency and high availabilityFast Reconfiguration of Network Topology (FRNT)
FRNT ring coupling
Multilink dual homing
IEEE 802.1D (STP) and IEEE 802.1w (RSTP)
IEEE 802.1AX/802.3ad Link Aggregation
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
Layer 2 securityIEEE 802.1X Port Access Control
MAC Authentication
IP routing, cyber security, firewall and VPNStatic IP routing
Dynamic IP routing
• OSPFv2
• RIPv1/v2
• Robust VRRP
• Static Multicast Routing
Stateful Inspection Firewall
• NAT and 1-1 NAT, Proxy ARP for 1-1 NAT
• Port Forwarding
IKEv1, certificates and PSK
• IKEv1
• VPN failover
Loopback Interface
ManageabilityManagement tools
• Web interface (HTTP and HTTPS or CLI (SSHv2 or Telnet)
• SNMPv1/v2c/v3
• Flexible management of configuration and log files
Flexible alarm/event handling system
USB Fluid configuration (Available for products with USB port)
Digital I/O and Flexible alarm/event handling system
Syslog (log files and remote syslog server)
Port Monitoring
SNTP (NTP client)
PPPoE client
DHCP client
DHCP server including option 82
DHCP relay agent including option 82
SNMP MIB supportRFC1213 MIB-2
RFC2863 Interface MIB (ifXTable)
RFC2819 RMON MIB (etherStatsTable)
RFC4188 Bridge MIB
RFC4133 Entity MIB (entityPhysical)
RFC3433 Entity Sensor MIB
RFC3621 Power Ethernet MIB

Technical data


Product description
Article number3641-1640
Ports12 x 10/100 Mbit/s (4 for bypass capability)
1 x 12 Mbit/s USB
DescriptionManaged EN50155 Backbone Routing Switch
Warranty period5 Years
EMC (Electromagnetic Compatibility)
EN-50121-3-2Railway applications – EMC: Rolling stock – Apparatus
EN-50155Railway applications, Approval/Compliance
Railway applications – Electronic equipment used on rolling stock
EMC specifications
EN 61000-4-2, ESDEnclosure contact discharge immunity: ±6 kV
Enclosure air discharge immunity: ±8 kV
IEC 61000-4-3, RF field AM modulatedEnclosure RF immunity: 20 V/m, 80 – 2700 MHz
EN 61000-4-4, fast transientsSignal port immunity: ±2 kV
Power port immunity: ±2 kV
EN 61000-4-5, surgePower port immunity:
±2 kV (L-E)
±1 kV (L-L)
EN 50155:2001, surgePower port immunity:
±8.4 kV (L-E)
±8.4 kV (L-L)
EN 61000-4-6, conducted RF immunitySignal port immunity:
10 V/m
0.15 – 80 MHz
Power port immunity:
10 V/m
0.15 – 80 MHz
EN 61000-4-8, power frequency magnetic fieldEnclosure immunity:
300 A/m
0, 16.7, 50 Hz
EN 61000-4-9, pulsed magnetic fieldEnclosure immunity: 300 A/m
EN-50155, voltage dips and interruptionResidual voltage 0%: 10 ms
EN 50155, supply overvoltage and under voltageOvervoltage 140%: 100 ms & 1000 ms
Residual voltage 60%: 100 ms
EN 55011, Limits: EN 50121-3-2,radiated emsissionEnclosure measurement:
40 dBμV/m QP
30 – 230 MHz
47 dBμV/m QP
230 – 1000 MHz
EN 55011, Limits: EN 50121-3-2, conducted emissionPower port measurement:
99 dBμV QP
0.15 – 5 MHz
93 dBμV QP
5 – 30 MHz
Signal port measurement:
99 dBμV QP
0.15 – 5 MHz
93 dBμV QP
5 – 30 MHz
EN 60950-1, dielectric strengthEN 60950-1, IT equipment
Reliability prediction
MTBF, operatingMIL-HDBK- 217F,operating, 305.000 h
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
Maximum surface temperature-
Dimensions (W x H x D)175 x 100 x 144 mm (6.88 x 3.93 x 5.66 inch)
Weight2240 g
Degree of protectionIP 65
MountingRear panel wall mounting
IEC 60068-2-6, vibrationOperating:
7.5 mm, 5 – 8 Hz
2 g, 8 – 500 Hz
IEC 60068-2-64, vibrationOperating:
Vertical 1.0 m/s² Transverse
1.0 m/s² Longit. 1.0 m/s²
IEC-60068-2-27, shockOperating:
15 g 11 ms, 3 x 6 chocks
Interface specifications, power
Rated voltage24 to 110 VDC
Operating voltage16.8 to 143 VDC
Rated current580 mA @ 24 VDC
140 mA @ 110 VDC
Inrush current5 mA²s @ 24 VDC
22 mA²s @ 110 VDC
Startup current600 mA @ 24 VDC
275 mA @ 110 VDC
(Power source capability)
PolarityReverse polarity protected
Redundant power inputNo
Isolation toAll interfaces and chassis
Galvanic connection toNone
ConnectionM12 A-coded male
Connector size0.2 – 2.5 mm² (AWG 24 – 13)
Shielded cableNot required
Interface specifications, 10/100BaseTX
Electrical specificationIEEE std 802.3. 2000 Edition
Data rateIEEE std 802.3. 2000 Edition
DuplexFull or half, manual or auto
Circuit typeSELV
Transmission range100 m / 328 ft
Isolation toAll interfaces and chassis
Galvanic connection toNone
ConnectionM12 D-coded
Shielded cableYes. Should also be separated from EMI disturbers
Conductive housingYes
Number of ports12
Interface specifications, USB
Electrical specificationUSB
Data rate12 Mbit/s
ProtocolUSB v2.0
ConnectionM12 A-coded female
Isolation toAll interfaces, but not to chassis


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Managed EN 50155 Backbone Routing Switch