RFID (Radio Frequency Identification) cards are contactless credentials used to:

• Grant access to doors, gates, and turnstiles
• Identify users in security and attendance systems
• Interface with access control readers

 In simple terms:
An RFID card acts like a wireless key—you present it to a reader, and it either grants or denies access.

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How RFID Cards Work

• Each card contains a microchip + antenna
• When placed near a reader:
  • The reader emits a radio signal
  • The card responds with its unique ID (UID) or stored data
• The control system decides whether to allow access

Typical read range:

• ~2–10 cm for most systems

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Main RFID Card Types (VERY IMPORTANT)

125 kHz (Low Frequency – LF)

• Most common in basic access systems
• Examples: EM4100, TK4100

Pros:

• Cheap
• Reliable

Cons:

• Low security (UID only)

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13.56 MHz (High Frequency – HF / MIFARE)

• Used in modern secure systems

 Pros:

• Encrypted memory
• Can store user data

Cons:

• More expensive

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Dual Frequency Cards

• Combine both:
  • 125 kHz + 13.56 MHz

Used when upgrading systems or supporting mixed readers

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Functional Role in Door Systems

RFID cards work together with:

• Readers (wall-mounted devices)
• Controllers (e.g., Marantec / access boards)
• Locks or motors

Typical process:

1. Card is presented
2. Reader detects frequency and ID
3. Controller verifies access
4. Door opens

 

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Technical Specifications (Typical RFID Card)

RFID cards are passive devices (no battery required).

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Integration with Door Systems

RFID cards are used with:

• Access control panels
• Door controllers (e.g., Marantec systems)
• Readers using:
  • Wiegand protocol
  • RS485 communication

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Important Practical Notes

Compatibility is critical

• A 125 kHz card WILL NOT work on a MIFARE reader and vice versa
• You must match:
  • Card frequency
  • Reader type

Security considerations

• 125 kHz → easy to clone
• MIFARE / DESFire → secure, encrypted

Typical South African use

• 125 kHz → older gate/door systems
• MIFARE → newer commercial systems

(The Company reserves the right to amend product specifications and information without notice.)