2026-09-21 · Equipo editorial KeXinMaterials
EN 50155 + EN 50126 + EN 50128 + EN 50129 + EN 45545 Ferroviario RAMS + Seguridad Incendio Familia Maletín B2B Guía
EN 50155 + EN 50126 + EN 50128 + EN 50129 + EN 45545 son las cinco principales normas ferroviarias europeas. Requerido para ferroviario + metro + tranvía + alta velocidad + control + seguridad.
EN 50155 Railway Electronics
EN 50155 "Railway applications - Electronic equipment used on rolling stock". Specifies environmental + electromagnetic + mechanical + electrical requirements for electronic equipment used on rolling stock.
EN 50155 scope: Electronic equipment used on rolling stock. Operating environment + EMC + power supply + mechanical + reliability + safety. Latest EN 50155:2021 (replaces EN 50155:2017).
EN 50155 environmental: Temperature class TX (-40 to +70C) + T1 (-25 to +55C) + T2 (-40 to +55C) + T3 (-25 to +70C) + T4 (-40 to +70C) + TX (-40 to +85C + 10 min at +100C). Humidity + altitude + shock + vibration.
EN 50155 power supply: Nominal voltage 24V DC + 36V DC + 48V DC + 72V DC + 96V DC + 110V DC. Voltage variations + interruptions + surges + brown-outs + reverse polarity protection.
EN 50155 EMC: EN 50121-3-2 (EMC rolling stock - radiated + conducted emissions + immunity). ESD + RF + surge + burst + voltage dips.
EN 50155 mechanical: Shock + vibration per EN 61373 (shock + vibration railway). Random vibration + sinusoidal vibration + mechanical shock.
EN 50155 reliability: MTBF (Mean Time Between Failures) per EN 61709. Typically > 100,000 hours for railway electronics.
EN 50155 cooling: Convection + conduction + forced air + liquid. Per environmental class.
EN 50155 connectors: M12 + D-sub + heavy-duty rectangular. Per EN 50155 environmental + EMC.
EN 50155 + EN 50121-3-2: EMC requirements for rolling stock equipment. Mandatory for railway compliance.
EN 50155 geographic scope: EU mandatory per European Railway Agency (ERA). Globally accepted for railway + metro + tram + high-speed rail + freight.
B2B relevance: For B2B protective cases containing railway electronics (CBTC + ERTMS + signaling + control + monitoring), EN 50155 compliance + Class T3/T4 + EN 50121-3-2 EMC + EN 61373 shock + vibration required.
EN 50126 RAMS Railway + EN 50128 Software + EN 50129 Safety-Critical
EN 50126 (RAMS - Reliability Availability Maintainability Safety) + EN 50128 (Railway Software) + EN 50129 (Safety-Critical Systems for Railway). The three foundational railway safety standards based on IEC 61508 functional safety.
EN 50126-1 "Railway applications - The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS) - Part 1: Generic RAMS process". Edition 2 (2017). Replaces EN 50126:1999.
EN 50126-2 "Part 2: Systems approach to safety". Edition 2 (2017).
EN 50126-3 "Part 3: Guide to the application of EN 50126-1 for rolling stock RAM".
EN 50126-4 "Part 4: Guide to the application of EN 50126-1 for Signalling RAM".
EN 50126-5 "Part 5: Guide to the application of EN 50126-1 for guided transport RAM".
RAMS process: 14-phase RAMS lifecycle per EN 50126-1. (1) Concept. (2) System definition + application conditions. (3) Risk analysis + evaluation. (4) Specification of system requirements. (5) Architecture + apportionment. (6) Design + implementation. (7) Manufacturing. (8) Installation. (9) System validation. (10) System acceptance. (11) Operation + maintenance. (12) Performance monitoring. (13) Modification + retrofit. (14) Decommissioning + disposal.
THR (Tolerable Hazard Rate) per EN 50126: Maximum acceptable failure rate per hour for hazardous failures. THR per SIL 1 (10^-5 to 10^-6) + SIL 2 (10^-6 to 10^-7) + SIL 3 (10^-7 to 10^-8) + SIL 4 (10^-8 to 10^-9).
Safety Integrity Level (SIL): Per EN 50126. SIL 1 (low risk) + SIL 2 (medium risk) + SIL 3 (high risk) + SIL 4 (very high risk). SIL 4 for ETCS + train control.
EN 50128 "Railway applications - Communication, signalling and processing systems - Software for railway control and protection systems". Edition 3 (2020). Replaces EN 50128:2011.
EN 50128 software SIL: SIL 0 (no safety) + SIL 1 + SIL 2 + SIL 3 + SIL 4. Software safety integrity levels.
EN 50128 software techniques: Per SIL level. SIL 1 (structured programming + testing) + SIL 2 (defensive programming + modular design) + SIL 3 (formal methods + static analysis + verification + validation) + SIL 4 (formal verification + mathematical proof + diverse programming).
EN 50128 tools: Compiler + static analyzer + test tools + requirements management + configuration management. Tool qualification per EN 50128 Annex B.
EN 50128 documentation: Requirements specification + software architecture + software design + implementation + verification + validation + safety case.
EN 50129 "Railway applications - Communication, signalling and processing systems - Safety related electronic systems for signalling". Edition 2 (2019). Replaces EN 50129:2003.
EN 50129 safety case: Required for safety-critical electronic systems for railway signaling. Includes system definition + risk analysis + safety requirements + design + implementation + verification + validation + operation + maintenance + decommissioning + safety assessment.
EN 50129 + IEC 61508: EN 50129 specific to railway signaling. IEC 61508 generic functional safety. EN 50129 derived from IEC 61508.
EN 50129 cross-acceptance: EU cross-acceptance framework per Common Safety Methods (CSM) Regulation (EU) 402/2013. Risk acceptance by EU railway authorities (ERA + national).
Geographic scope: EN 50126 + EN 50128 + EN 50129 EU mandatory + globally accepted for railway + metro + tram + high-speed rail.
B2B relevance: For B2B protective cases containing railway signaling + control + protection software + hardware, EN 50126 + EN 50128 + EN 50129 compliance per SIL + cross-acceptance framework + ERA approval required.
EN 45545 Railway Fire Safety + Combined B2B Procurement
EN 45545 "Railway applications - Fire protection on railway vehicles". Fire safety requirements for railway + metro + tram + high-speed rail. Combined railway regulatory family + B2B procurement workflow.
EN 45545 "Railway applications - Fire protection on railway vehicles". Multi-part standard. Latest EN 45545:2013 + amendments 2016.
EN 45545-1 General: Hazard level classification + general requirements + principles. Definition of categories + requirements.
EN 45545-2 Requirements for fire behavior of materials + components: Reaction to fire testing per ISO 5658-2 (spread of flame) + ISO 5660-1 (cone calorimeter heat release) + ISO 5659-2 (smoke density + toxicity) + EN ISO 11925-2 (ignitability).
EN 45545-3 Fire resistance requirements for barriers + partitions: Fire resistance rating per R1 (30 min) + R10 (10 min) + R15 (15 min). Tested per EN 1364 + EN 1366 + EN 1634.
EN 45545-4 Fire safety requirements for rolling stock design: Layout + escape routes + fire detection + fire suppression + emergency lighting + smoke control + emergency ventilation.
EN 45545-5 Fire safety requirements for electrical equipment: Including cases + connectors + cables. Fire behavior + smoke + toxicity + heat release.
EN 45545-6 Fire control + detection systems: Detection + alarm + suppression + control + emergency communication.
EN 45545-7 Fire safety requirements for flammable liquids + gases: Storage + transport + emergency shut-off.
EN 45545 Hazard Levels HL1 + HL2 + HL3: HL1 (low risk + standard vehicles) + HL2 (medium risk + sleeping vehicles + metros) + HL3 (high risk + tunnels + long tunnels + sleeping vehicles in tunnels).
EN 45545 Material Requirement Sets R1-R24: Per component type. R1 (interior surfaces) + R7 (electrical equipment exterior) + R22 + R23 + R24 (cables + connectors).
EN 45545 testing labs: SNCF (France) + Deutsche Bahn (Germany) + Trenitalia (Italy) + SBB (Switzerland) + OEBB (Austria) + ProRail (Netherlands) + TÜV (Germany) + LRQA + SGS.
EN 45545 + ASTM E162 + ASTM E662: North American railway fire standards (FRA + APTA) + transit (NFPA 130). Different from EN 45545 but similar concepts.
Combined railway regulatory family: EN 50155 (electronics environment) + EN 50126 (RAMS) + EN 50128 (software SIL) + EN 50129 (signaling safety) + EN 45545 (fire safety) + EN 50121-3-2 (EMC) + EN 61373 (shock + vibration) + IEC 60077 (railways) + IEC 61373 (shock + vibration).
Combined SIL + fire: Case containing signaling + safety electronics requires EN 50155 + EN 50126 + EN 50128/50129 (per SIL) + EN 45545 (per HL) + EN 50121-3-2 (EMC).
Common B2B mistakes: (1) Treating EN 50155 + EN 50126 + EN 50128/50129 + EN 45545 as separate. (2) Missing SIL level determination. (3) Missing HL level determination. (4) Missing EN 50155 environmental class (TX + T1-T4). (5) Missing EN 50121-3-2 EMC. (6) Missing EN 61373 shock + vibration. (7) Missing cross-acceptance framework.
B2B procurement workflow: (1) Identify customer railway application (CBTC + ERTMS + ETCS + signaling + control + monitoring + passenger info + fire). (2) Verify EN 50155 compliance + environmental class (TX + T1-T4). (3) Determine SIL per EN 50126 + EN 50128 + EN 50129. (4) Determine Hazard Level per EN 45545 (HL1 + HL2 + HL3). (5) Verify EN 50121-3-2 EMC + EN 61373 shock + vibration. (6) Contract terms: SIL declaration + HL declaration + ERA cross-acceptance + national authority approval + safety case + verification + validation.
B2B recommendation: For B2B protective cases for railway electronics + signaling + control + safety, require EN 50155 + EN 50126 (RAMS) + EN 50128 (software SIL) + EN 50129 (safety case) + EN 45545 (HL per application) + EN 50121-3-2 (EMC) + EN 61373 (shock + vibration), FOB Shenzhen/Ningbo/EXW delivery 30-45 days.
Puntos clave
- EN 50155:2021 rolling stock electronics. Temperature classes TX + T1-T4. Power 24-110V DC. EMC EN 50121-3-2. Shock + vibration EN 61373.
- EN 50126:2017 RAMS. 14-phase lifecycle. THR per SIL 1-4. SIL 4 = 10^-8-10^-9/hr.
- EN 50128:2020 software SIL 0-4. SIL 4 requires formal verification + mathematical proof + diverse programming.
- EN 50129:2019 signaling safety case. Derived from IEC 61508. Cross-acceptance framework per CSM (EU) 402/2013.
- EN 45545 fire safety HL1-3 + R1-R24 material sets. HL3 for tunnels + sleeping in tunnels.
- Geographic scope: EU mandatory per ERA. Globally accepted for railway + metro + tram + high-speed rail.
- Combined family: EN 50155 + EN 50126 + EN 50128/50129 + EN 45545 + EN 50121-3-2 + EN 61373 + IEC 60077 + IEC 61373.
- B2B recommendation: Require EN 50155 + EN 50126 + EN 50128 (software SIL) + EN 50129 + EN 45545 (HL per app) + EN 50121-3-2 + EN 61373, FOB Shenzhen/Ningbo/EXW.
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