ALSTOM VOOB8-B 12004-106-04
The ALSTOM VOOB8-B 12004-106-04 is a ruggedized 8-channel digital output module designed for mission-critical railway signaling systems. As part of ALSTOM’s TrackSafe™ series, this module delivers 2A/channel switching capacity with reinforced galvanic isolation (2.5kV AC) between control logic and field outputs. The VOOB8-B 12004-106-04 integrates fail-safe diagnostics that detect open-circuit/short-circuit conditions within 50ms, making it essential for interlocking systems in high-speed rail networks.
Optimized for EN 50155 compliance, this module operates flawlessly in -40°C to +85°C environments while withstanding 5g vibration (10-150Hz) and 50g shock impacts. Its patented contact erosion compensation extends relay lifespan by 300% compared to conventional railway I/O modules. The ALSTOM VOOB8-B 12004-106-04 supports both SELV (Safety Extra-Low Voltage) and PELV (Protective Extra-Low Voltage) configurations through configurable terminal blocks.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | VOOB8-B 12004-106-04 |
| Manufacturer | ALSTOM Transport |
| Product Type | Railway Digital Output Module |
| Channels | 8 isolated outputs |
| Contact Rating | 2A @ 30VDC / 250VAC |
| Isolation Voltage | 2500V RMS (channel-to-logic) |
| Response Time | <3ms activation / <5ms deactivation |
| Power Supply | 24VDC ±20% (EN 50163 compliant) |
| Power Consumption | 4W (max load) |
| Protection Class | IP40 (front) / IP20 (terminals) |
| EMC Immunity | EN 50121-3-2 Level 3 |
| Vibration | 5g (10-150Hz per EN 61373) |
| Operating Temp | -40°C to +85°C |
| MTBF | 1,250,000 hours |
| Dimensions | 145×110×75mm |
| Weight | 450g |
Key Features and Advantages:
Railway-specific durability: The ALSTOM VOOB8-B 12004-106-04 features gold-plated bifurcated contacts that maintain <50mΩ resistance after 1 million operations. Its unique arc suppression circuit reduces electromagnetic interference by 18dB in electrified track environments.
Intelligent diagnostics: Embedded microcontroller performs real-time contact wear monitoring, calculating remaining useful life (RUL) with ±5% accuracy. The module’s dual-wire redundant configuration allows hot-swap replacement without interrupting signaling operations.
Configuration flexibility: Front-mounted DIP switches enable rapid parameterization for different railway signaling standards (ETCS Level 2, CBTC). The VOOB8-B 12004-106-04’s backward compatibility with legacy ALSTOM VOIB8 modules simplifies system upgrades.
Application Areas:
The ALSTOM VOOB8-B 12004-106-04 is critical in:
- Railway interlocking: Point machine control
- Metro signaling: Platform screen door operation
- Tram systems: Traffic light priority control
- Freight yards: Level crossing barrier actuation
In urban transit applications, this module coordinates emergency brake release circuits across 30+ car trainsets. Its marine-grade variant (VOOB8-B/M) controls navigational lighting systems on rail ferries.
Related Products:
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- VPSU-4R 12006-304-03: Redundant power supply
- VOOB8-A 12004-105-00: Previous generation model
- VCMX-12 12007-408-04: Expansion chassis
- VPRO-7S 12008-502-05: Signal processor unit
- VHMI-3T 12009-609-06: Touchscreen controller
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