The Role of Relays in Secure Access Control Systems
208.00 $
Published date: 2025/10/08
- Location: 3233, Monticello, Indiana, United States
Relays serve a vital function in secure access control systems by functioning as electrical switches that enable low-power signals to control high-power devices. In access control, a small signal from a card reader is frequently insufficient to directly drive a door lock. This is precisely where relays step in—they accept a low-voltage command انواع رله from the access control panel and trigger a separate circuit operating at elevated voltage. This electrical isolation protects sensitive electronics from surges that could originate in the actuator system.
They enhance system resilience through fail-safe design by supporting programmable fail modes. For example, a relay can be programmed to release the door on blackout—ensuring unimpeded evacuation during emergencies. Such default-to-safe operation is non-negotiable in facilities bound by fire codes.
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