RFID-based Access Control System Installation Full Guide

An RFID-based access control system functions by creating an electronically managed security barrier for a door, utilizing a combination of identification hardware, a central controller, and an electromechanical locking mechanism. At the heart of the system is the access control reader (SA32-E), which remains powered by a 12V, 3A DC power supply adaptor or SMPS. The reader continuously emits an electromagnetic field designed to detect compatible RFID tags when they are brought into close proximity. When a user presents a valid RFID tag, the reader captures the unique identifier encoded on the tag and compares it against its internal database or authorization logic. Upon successful verification, the reader changes the state of its internal relay or output signal, which governs the power delivered to the magnetic lock. The magnetic lock, specified here as a fail-safe type mounted securely with a dedicated bracket, relies on continuous electrical current to maintain a powerful magnetic field that tightly binds the armature plate to the electromagnet, keeping the door firmly shut. When the access control reader validates an authorized RFID tag, it temporarily cuts or interrupts power to the magnetic lock, releasing the magnetic hold and allowing the door to be opened. Conversely, if someone needs to exit from the secure side without an RFID tag, they press the exit push button, which is wired to the designated request-to-exit input terminals on the system. Pressing this button momentarily signals the control system to drop power to the magnetic lock, allowing safe egress. Throughout operation, robust connecting wires, such as Cat 6 or standard copper wires, ensure reliable power distribution and signal transmission between the 12V power supply, the SA32-E reader, the exit push button, and the magnetic lock.