Reliable impact resistanceBolt side‑load breaking force up to 20,000 N80 N bolt pre‑load ensures reliable unlocking in both fail‑locked and fail‑unlocked modelsStatus monitoring via programmable monitoring contacts; optional relay board adds potential‑free monitoring contactProgrammable unlocking timeSequence control system with mechanical and electrical door‑status monitoringIntegrated error log and undervoltage indicator for easier fault diagnosis; rapid on‑site analysis and reduced downtimeBuilt‑in microprocessor control unit — no external control unit requiredVertical installation possible in frame or door leafHorizontal installation possible in the top frameControl board with protective coating, suitable for protected outdoor installationsCompatible with previous L3 series, allowing easy replacement