What Railway & Traffic Signal UPS Covers
Regulations mandate ≥2-hour signal backup. Signal equipment in tunnels, elevated highways, remote roads faces 90%+ humidity, -20 °C winters, 3g vibration from trains. Lead-acid dies within 2 years; each tunnel replacement requires a "maintenance window" — difficult and costly. PLB, founded 2014, railway UPS passes EN 50121 EMC + IEC 61373 vibration testing. IP67 sealed + wide-temp -20 °C to 55 °C. Dual-group redundancy ensures signals never go dark. ≥90% backup retention over 10 years.
Professional Battery Solutions
30 = 30-Second Signal Failure = Train Collision — Nobody Can Bear This
Railway signaling is the "eyes" of train operations. Power loss extinguishes signals — following trains lose occupancy information. Without UPS, dispatch control lost within 30 seconds. Collision or derailment is catastrophic. Railway saying: "Signal battery cost isn't the problem — dark signals are." But procurement still focuses on initial price.
Signal interruption risk to zero — priceless. PLB LL-UPS110100-RAIL with 110V 100Ah directly fits railway signal panels. Dual-redundant architecture — even if one group fails completely, the other independently supplies. 2+ hour backup. EN 50121 certified — no track circuit interference.
| Lead-acid | PLB rail | |
|---|---|---|
| Signal interruption risk | Present, single string | Zero, dual redundant |
| Backup time | 1 h, degrading | 2 h+, held for 10 years |
| EMC certification | None | EN 50121 |
| Tunnel-window swaps per 10 years | 3–4 | 1–2 |
2 Tunnel Damp, Cold, and Vibratory — Standard Batteries Die in 2 Years
The pain is specific: 2 Tunnel Damp, Cold, and Vibratory — Standard Batteries Die in 2 Years In daily operation, lead-acid or manually managed packs lose capacity between scheduled checks, maintenance teams cannot inspect every unit, and the failure surfaces only when the load is already at risk.
Maintenance window replacements from 3-4 to 1-2 per 10 years — dramatically reducing coordination costs and downtime risk. PLB's LiFePO₄ pack and BMS monitor cell voltage, temperature and SOC continuously, alert before a weak cell becomes a failure, and are sized to the application's load profile.
| Conventional / manual | PLB LiFePO₄ | |
|---|---|---|
| Monitoring | Periodic checks | Continuous BMS |
| Fault warning | At failure | Threshold alerts |
| Maintenance | Scheduled visits | Exception-based |
| Service life | 2–3 years | 6,000+ cycles |
All Traffic Lights Out — Manual Control Can't Manage the Gridlock
Urban intersection traffic lights depend on UPS. During storm-caused widespread outages, all lights go dark simultaneously — within 10 minutes, all major roads gridlock. Ambulances and fire trucks stuck. Lead-acid UPS only 30 min — after 30 minutes of widespread outage, all intersections go dark simultaneously. Traffic authorities fear this "cascading paralysis."
Traffic signals continue 4+ hours during widespread outages — no citywide paralysis. PLB 4-hour backup (LL-UPS48100-TRF) with -20 °C to 55 °C wide-temp. BMS remote monitoring integrates with traffic command center dashboard. Anomaly intersections auto-highlighted for precise repair dispatch.
| Lead-acid | PLB traffic | |
|---|---|---|
| Wide-area outage response | Fails after 30 min | 4 hours of operation |
| Temperature range | 0–40 °C | −20 to 55 °C |
| Remote monitoring | None | Command-center dashboard |
| City recovery | Gridlock until power returns | Orderly traffic within 4 h |
Solution Advantages
Railway
No track circuit interference
Certified to EN 50121 railway EMC and IEC 61373 vibration, with 110V output that connects directly to signaling power panels.
EN 50121 certified · IEC 61373 vibration tested · 110V plug-inDual Redundancy
Zero signal interruption
Two independent supply strings mean any single failure is taken over immediately, so the signaling system is never without power.
Independent supply strings · 0 ms switching · Non-negotiable safetyCompliant
10-year backup ≥90% retention
Backup duration stays inside the 2-hour regulatory requirement across a ten-year cycle life, with automatic test-report export for annual reviews.
10-year cycle life · Automatic report export · No pre-audit battery swapsSealed
Tunnel-rated, vibration-proof
IP67 sealing and anti-vibration construction allow five years of maintenance-free service in tunnels, on viaducts and at remote track sections, cutting tunnel-window replacements by 80%.
IP67 tested on every unit · −20 to 55 °C · 80% fewer tunnel-window swapsFrom Selection to After-Sales — PLB Stays With You
Four commitments that apply to every page in this category, from the first technical question to long-term support.
Technical Selection Support
Engineer recommends within 24 hours
Tell us the load profile, backup time and installation space — our engineers size the pack and recommend the matching model within 24 hours.
Dedicated technical team · 24-hour response
OEM / ODM Customization
From cell to cabinet, fully customizable
From cells, BMS, housing and terminals to the nameplate, everything can be customized.
4–8 week customization · Tooling development supported
Global Shipping
Export to 100+ countries
Export-compliant packaging with UN 38.3 air transport certification and worldwide delivery.
UN 38.3 certified · MSDS available · Export compliant
Warranty & Support
Standard warranty, lifetime support
Standard products carry a full warranty, backed by lifetime technical support.
Warranty terms on request · Lifetime technical supportWhy Choose PLB?
Years of Manufacturing
Founded in Dongguan, China in 2014
Countries Served
Export-compliant packaging and worldwide delivery
Voltage Platforms
From 25.6V to 512V, built on the same cell platform
After-Sales Rate
Monitored by the internal quality traceability system
Full Range & Model Selection
Complete product range and model selection — rack modules for data halls, cabinet packs for industrial rooms and outdoor packs for telecom sites.
| Model | Voltage | Capacity | Continuous current | Form factor | Applications |
|---|---|---|---|---|---|
| 25.6V 50Ah | 25.6V | 50Ah | 50A | Module | Small control rooms · edge cabinets |
| 25.6V 100Ah | 25.6V | 100Ah | 100A | Module / rack | Industrial UPS · small data rooms |
| 48V 100Ah | 48V | 100Ah | 100A | 19-inch 3U | Telecom sites · edge data centers |
| 51.2V 200Ah | 51.2V | 200Ah | 200A | 19-inch rack | Data center UPS · colocation |
| 512V 100Ah | 512V | 100Ah | 500A | Cabinet | Large UPS rooms · 1–800kVA systems |
By system size: up to 10kVA → 25.6V modules.
By environment: Data hall → 19-inch rack modules.
Not sure? Send us the load profile and required backup time — our engineers will size the system directly.
Frequently Asked Questions
The questions UPS buyers and facilities engineers ask most about LiFePO₄ UPS modules in the Traffic & Railway Signaling scenario — EN 50121 (railway EMC) and 2 h+ (backup over 10 years), and what it takes to qualify.
Will a PLB pack replace the lead-acid unit in the Traffic & Railway Signaling scenario without rework?
Modules are sized to common lead-acid blocks and cabinet voltages (25.6 V, 48 V, 51.2 V, 512 V) with the same terminal layout and 19-inch or cabinet mounting, so the string, breaker and charger settings carry over. Typical models for Traffic & Railway Signaling builds are LL-UPS110100-RAIL and LL-UPS48100-TRF.
What runtime and output can we expect over a backup window in the Traffic & Railway Signaling scenario?
At equal nominal capacity the LiFePO₄ pack delivers roughly 90% usable energy against about 60% for lead-acid, and 2C high-rate discharge covers the short backup window without derating.
What temperature and ingress rating is specified for the Traffic & Railway Signaling scenario?
Specification: EN 50121 (railway EMC). BMS thermal protection governs charge and discharge at the temperature limits. Endurance: 2 h+ (backup over 10 years).
Can the pack report SOC and alarms to monitoring already used in the Traffic & Railway Signaling scenario?
RS485, CAN and dry-contact alarms report cell voltage, current, temperature, SOC and alarms to the UPS or site monitoring system.
Which models cover the Traffic & Railway Signaling scenario, and how is delivery handled?
Typical models are LL-UPS110100-RAIL and LL-UPS48100-TRF. Custom packs take 4–8 weeks including tooling, and lead time for standard models is confirmed on the quotation. Tell us the load profile, backup time and installation space — our engineers size the pack and recommend the matching model within 24 hours.
Need a Selection Recommendation?
Tell us the load, backup time and installation space — our engineers will recommend the matching battery within 24 hours.
NDA available upon request · Typical response within 12 hours