Nov. 21, 2025
Subrack (19’’Eurocard rack) has become the preferred mechanical platform for railway signaling and Train Control and Management System (TCMS), including TCC, RBC, Interlocking, and CTC.
With standardized interfaces, modular expansion capability, and proven environmental reliability, it delivers the mechanical foundation required for modern, safety-critical railway control.
Dense wiring and non-modular structures make unit replacement time-consuming, directly affecting failover switchover and system uptime.
CTCS-2/3 requires 2oo2 or 3oo2 safety architectures. Many legacy platforms cannot easily expand CPU, safety I/O, power, or communication boards without re-wiring.
RBC–GSM-R and TSRS–safety network links require stable high-speed differential channels with strict EMC performance.
Upgrading between CTCS levels or adapting between CTCS and Communications-based train control (CBTC) usually involves major mechanical redesign and cable changes.
Railway equipment must withstand vibration, shock, EMC, and fire safety requirements throughout its operational life.
Subrack architecture is widely adopted because it directly addresses these system-level challenges.
• Mechanical Standard:
• 19” IEC 60297 compatible
• 6U, 84TE / 42TE Eurocard form factor
• Backplane Performance:
• High-speed differential backplane
• Supports up to 5 Gb/s
• Suitable for 100M/1G redundant communication
• Modular Board Architecture:
• Eurocard plug-in units: CPU, safety I/O, power modules, communication boards
• Hot-swappable design
• Module replacement within 3 minutes
• Environmental Reliability:
• IEC 61373 (vibration & shock)
• EN 50121-3-2 (EMC)
• EN 45545 (fire protection)
• System Compatibility:
• Supports CTCS-0/1/2/3, Communications-based train control(CBTC) and hybrid systems
• Suitable for TCC, RBC, Interlocking (CBI), CTC, PSC (Platform Screen Door Safety Core)
Subrack platforms define plug-in boards as standard Line Replaceable Units (LRUs).
This enables:
• Hot-swap capability
• 3-minute board replacement
• Faster recovery during dual-system switchover
• Unified maintenance logic for both onboard and ground systems
This dramatically reduces operational downtime and maintenance effort.
Subrack + Eurocard connectors allow all core functions to be modularized:
• CPU
• Safety I/O
• Power modules
• Communication boards
Modules can be mixed, expanded, or replaced freely without re-wiring, enabling rapid deployment of 2oo2 / 3oo2 safety architectures.
With a 5 Gb/s differential backplane, the Subrack platform supports:
• RBC–GSM-R redundant communication
• TSRS–safety network high-bandwidth links
• Lower EMC risk due to optimized grounding and layout
This ensures stable and reliable communication for safety-critical systems.
Designed for long-term operation in harsh rail environments, Subrack complies with:
• IEC 61373 vibration & shock
• EN 50121-3-2 EMC immunity
• EN 45545 fire safety
Ensuring dependable performance for high-speed rail, metro, and urban transit applications.
In “Four-Network Integration” platform screen door projects, PSC (Platform Safety Controller) using Subrack architecture achieved:
• Direct compatibility with CBTC and CTCS-2
• Only interface boards need to be added or replaced
• Zero change to mechanical structure and wiring
This approach greatly reduces the engineering effort for upgrades such as CTCS-0 → CTCS-2, offering a highly cost-effective migration path.
With its advantages in hot-swapping, high density, anti-vibration performance, and modular scalability, Subrack is rapidly expanding from onboard communications into ground-based CTCS safety platforms.
As the industry moves toward:
• Full electronic system architectures
• High-altitude sealing design
• Intelligent maintenance and diagnostics
• Zero-relay, zero-downtime, zero-maintenance platforms
Subrack is becoming the core mechanical carrier of next-generation train control systems.
Subrack architecture provides a standardized and modular mechanical platform for the Train Control and Management System (TCMS). Its hot-swappable Eurocard modules, high-speed backplane, and reliable mechanical design ensure stable communication, faster fault recovery, and long-term environmental durability within TCMS applications.
Subrack supports high-speed differential backplanes up to 5 Gb/s, ensuring signal integrity for safety-critical CBTC communication. Its modular CPU, I/O, power, and communication boards let operators upgrade CBTC controllers easily without re-wiring or major redesign.
Subrack defines standardized plug-in boards as LRUs, enabling 3-minute module replacement and hot-swap maintenance. This greatly improves system availability for TCMS, CBTC, CTC, TCC, RBC, and other signaling systems by reducing recovery time after failures.
Yes. Subrack is designed for multi-system compatibility, supporting CTCS-0/1/2/3 and Communications-Based Train Control (CBTC). Operators can migrate between CTCS levels or integrate hybrid CTCS-CBTC architectures by simply adding or swapping interface boards, without mechanical redesign.
Subrack complies with IEC 61373, EN 50121-3-2, and EN 45545, making it resistant to vibration, shock, EMC challenges, and fire hazards. This makes it ideal for long-term service in TCMS, CBTC controllers, and other next-generation train control applications that demand high reliability.
Oct. 01, 2023
For PCB board of the subrack insertion and extraction, Provides assistance when pulled out.Composed of four parts: handle, scutcheon, printed board bracket, and shaft. Handle material: PC+GF20%, Fire retardant standard: UL94V1, printed board bracket material: die-cast zinc alloy surface nickel plating.
Oct. 08, 2023
The subrack does not have a series of profiles, and after receiving an order, it is usually customized and processed according to the drawings. Products from different customers and products of different specifications from the same customer all need to be redesigned and processed, resulting in higher costs;