125KHz RFID Key Fob – Support Documentation
The 125KHz RFID Key Fob is a compact, contactless device used for identification and access control applications. Operating at a low frequency of 125 kHz, these key fobs are commonly employed in systems such as electronic locks, time attendance systems, and asset tracking solutions. They are available in both read-only and read/write variants, depending on the embedded chip type.
Specifications
| Parameter | Details |
|---|---|
| Operating Frequency | 125 kHz |
| Chip Types | EM4100 (Read-Only), T5577 (Read/Write), EM4305 (Read/Write) |
| Memory Capacity | EM4100: 64-bit ROM; T5577: 330 bits EEPROM; EM4305: 512 bits EEPROM |
| Reading Distance | Up to 10 cm (depending on reader and environment) |
| Material | ABS Plastic |
| Dimensions | Approximately 35mm x 29mm x 5mm |
| Operating Temperature | -40°C to +85°C |
| Waterproof | Yes (IP67 rated) |
Chip Variants
| Chip Type | Features | Applications |
|---|---|---|
| EM4100 | Read-Only; 64-bit unique ID | Basic access control, identification |
| T5577 | Read/Write; 330 bits EEPROM; Configurable for various formats | Advanced access control, cloning, emulation |
| EM4305 | Read/Write; 512 bits EEPROM; Password protection | Secure access control, animal identification |
Features
- Compact and lightweight design for easy portability.
- Durable ABS plastic housing with waterproof capabilities.
- Compatible with a wide range of 125 kHz RFID readers.
- Available in multiple colours for easy identification.
- Customizable with logos or serial numbers upon request.
Usage Instructions
- Reader Compatibility: Ensure your RFID reader supports 125 kHz frequency and the specific chip type of your key fob.
- Programming (for Read/Write Fobs): Use compatible RFID writers (e.g., Proxmark3, iCopy) to program T5577 or EM4305 fobs with desired data formats.
- Integration: Incorporate the key fob into your access control system by registering its unique ID or programmed data.
- Testing: Verify functionality by presenting the key fob to the reader and confirming the expected response (e.g., door unlocks, access granted).
Troubleshooting
- Key Fob Not Recognized: Verify that the reader supports the key fob’s chip type and that the fob is within the effective reading distance.
- Inconsistent Reading: Check for electromagnetic interference or physical obstructions between the key fob and reader.
- Programming Failures (for Read/Write Fobs): Ensure the RFID writer is compatible and functioning correctly. Confirm that the fob is not write-protected or damaged.
Frequently Asked Questions (FAQs)
- Q: Can I duplicate my existing access card to a 125 kHz key fob?
- A: If your access card operates at 125 kHz and uses a compatible chip format, you can clone it to a writable key fob like the T5577 using appropriate RFID writing tools.
- Q: Are these key fobs secure for sensitive access control?
- A: For higher security requirements, it’s recommended to use key fobs with password protection and encryption features, such as those with EM4305 chips. Additionally, implementing multi-factor authentication enhances security.
- Q: What is the typical lifespan of a 125 kHz RFID key fob?
- A: These key fobs are designed for durability, with a typical lifespan exceeding 100,000 read/write cycles and operational longevity of several years under normal usage conditions.
Applications
- Building and room access control systems.
- Time and attendance tracking.
- Asset and inventory management.
- Parking lot access.
- Membership and loyalty programs.
For further assistance or inquiries, please contact our support team.