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.