Answer:
The C3-100 integrates onboard hardware protection against over-current, over-voltage, and polarity reversal across power and I/O terminals. Its embedded firmware autonomously executes Anti-Passback, First-Card Opening, Multi-Card Verification, and Duress Password Entry without relying on continuous server connectivity.
The ZKTeco C3-100 is engineered with dedicated industrial hardware safeguards and embedded access intelligence:
- Electrical Circuit Protection: The board incorporates solid-state protection circuitry covering over-current, over-voltage, and reverse polarity across the 12V DC power inputs and all external terminal interfaces (Wiegand lines, sensor inputs, and relay outputs).
- Autonomous Offline Processing: If network connectivity to the host server drops, the controller continues full autonomous operation. It verifies credentials against local flash storage and enforces security rules without delay.
- Embedded Firmware Logic: Advanced door management logic is pre-programmed into the controller firmware, including true Anti-Passback (preventing card-tailgating), First-Card Opening (keeping a perimeter unlocked only after authorized staff access), Multi-Card Verification (requiring dual or multiple credentials for high-security areas), and Duress Password Entry linked to silent auxiliary alarm outputs.
- Data Preservation: All database credentials and real-time transaction event logs are recorded in non-volatile flash memory, preventing database loss or corruption during unexpected power outages. When installed inside an enclosure with a 12V DC backup battery (they are not included), the panel maintains complete operational continuity.
