High Security Multi-Door Access Control Board 4 Door Network Panel with 20, 000 User Capacity for Large Buildings

High Security Multi-Door Access Control Board 4 Door Network Panel with 20, 000 User Capacity for Large Buildings. High User Capacity: Supports up to 20,000 users for large-scale building access control. Advanced 32-Bit Technology: Features ARM platform with high-speed operation for immediate door access. TCP/IP Network Communication: Enables remote authentication, real-time monitoring, and stable network connectivity. Robust Data Protection: Large-capacity Flash memory retains data for 10 years even during power interruptions. Multi-Method Door Access: Supports card, password, card+password, double cards, and timed door switching. Industrial Grade Stability: Includes lightning protection, surge protection, and optocoupler protection for all inputs. Scalable Controller System: No limit on the maximum quantity of controllers for unlimited expansion. Comprehensive Security Features: Supports anti-passback, interlock, fire alarm linkage, and multiple event alarms.