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Managed EN50155 backbone routing switch--WESTERMO
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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 EN50155.
Westermo understand that systems on railcars are required by the EN50155 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 EN50155 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.


Product description
Status Discontinued
Article number 3641-1630
Ports 12 x 10/100 Mbit/s (4 for bypass capability)
1 x 12 Mbit/s USB
Description Managed EN50155 Backbone Routing Switch
Warranty period 5 Years
EMC (Electromagnetic Compatibility)
EN-50121-3-2 Railway applications – EMC: Rolling stock – Apparatus
EN-50155 Railway applications, Approval/Compliance
EMC specifications
EN 61000-4-2, ESD Enclosure contact discharge immunity: ±6 kV
Enclosure air discharge immunity: ±8 kV
IEC 61000-4-3, RF field AM modulated Enclosure RF immunity: 20 V/m, 80 – 2700 MHz
EN 61000-4-4, fast transients Signal port immunity: ±2 kV
Power port immunity: ±2 kV
EN 61000-4-5, surge Power port immunity:
±2 kV (L-E)
±1 kV (L-L)
EN 50155:2001, surge Power port immunity:
±8.4 kV (L-E)
±8.4 kV (L-L)
EN 61000-4-6, conducted RF immunity Signal 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 field Enclosure immunity:
300 A/m
0, 16.7, 50 Hz
EN 61000-4-9, pulsed magnetic field Enclosure immunity: 300 A/m
EN-50155, voltage dips and interruption Residual voltage 0%: 10 ms
EN 50155, supply overvoltage and under voltage Overvoltage 140%: 100 ms & 1000 ms
Residual voltage 60%: 100 ms
EN 55011, Limits: EN 50121-3-2,radiated emsission Enclosure measurement:
40 dBμV/m QP
30 – 230 MHz
47 dBμV/m QP
230 – 1000 MHz
EN 55011, Limits: EN 50121-3-2, conducted emission Power 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 strength EN 60950-1, IT equipment
Reliability prediction
MTBF, operating MIL-HDBK- 217F,operating, 306.000 h
Temperature, operating –40 to +70ºC (–40 to +158ºF)
Temperature, storage –40 to +70ºC (–40 to +158ºF)
Humidity, operating 5 to 95% relative humidity
Humidity, storage 5 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)
Weight 2240 g
Degree of protection IP 65
Cooling Convection
Mounting Rear panel wall mounting
IEC 60068-2-6, vibration Operating:
7.5 mm, 5 – 8 Hz
2 g, 8 – 500 Hz
IEC 60068-2-64, vibration Operating:
Vertical 1.0 m/s² Transverse
1.0 m/s² Longit. 1.0 m/s²
IEC-60068-2-27, shock Operating:
15 g 11 ms, 3 x 6 chocks
Interface specifications, power
Rated voltage 24 to 110 VDC
Operating voltage 16.8 to 143 VDC
Rated current 580 mA @ 24 VDC
140 mA @ 110 VDC
Inrush current 5 mA²s @ 24 VDC
22 mA²s @ 110 VDC
Startup current 600 mA @ 24 VDC
275 mA @ 110 VDC
(Power source capability)
Polarity Reverse polarity protected
Redundant power input No
Isolation to All interfaces and chassis
Galvanic connection to None
Connection M12 A-coded male
Connector size 0.2 – 2.5 mm² (AWG 24 – 13)
Shielded cable Not required
Interface specifications, 10/100BaseTX
Electrical specification IEEE std 802.3. 2000 Edition
Data rate IEEE std 802.3. 2000 Edition
Protocol -
Duplex Full or half, manual or auto
Circuit type SELV
Transmission range 100 m / 328 ft
Isolation to All interfaces and chassis
Galvanic connection to None
Connection M12 D-coded
Shielded cable Yes. Should also be separated from EMI disturbers
Conductive housing Yes
Miscellaneous -
Number of ports 12
Interface specifications, USB
Electrical specification USB
Data rate 12 Mbit/s
Protocol USB v2.0
Connection M12 A-coded female
Isolation to All interfaces, but not to chassis


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