1. Introduction
The YUHANUS 125KHZ RFID ID Cards Keypad Panel is a robust access control system designed for secure entry management. It supports up to 1000 user cards and a unique PIN, offering multiple access methods including ID card, PIN, or a combination of both. Constructed from fire-resistant ABS material, this keypad ensures durability and safety. It features full programming directly from the keypad, an anti-tamper alarm, and supports an external doorbell chime. This manual provides detailed instructions for installation, operation, and maintenance.
2. Safety Information
- Read all instructions carefully before installation and operation.
- Ensure power is disconnected before wiring to prevent electrical shock.
- This device is designed for indoor use or protected outdoor environments. Avoid direct exposure to water or extreme weather conditions.
- Only use the specified power supply (DC 12V).
- Do not attempt to disassemble or repair the unit yourself. Contact qualified personnel for service.
3. Package Contents
- 1x YUHANUS 125KHZ RFID ID Keypad Panel
- 10x 125KHZ ID Keyfobs
- Mounting Screws and Wall Plugs
- User Manual (this document)

Image: Included 125KHZ ID Keyfobs
4. Product Overview
The keypad panel features a numeric keypad, status indicator LEDs, and a doorbell button. The rear panel includes wiring terminals and an anti-tamper switch.

Image: Front view of the Keypad Panel

Image: Keypad Panel with External Doorbell Connection

Image: Anti-Tamper Switch (Internal)
5. Specifications
| Feature | Specification |
|---|---|
| Model Number | CU-K03 |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Dimensions (L x W x H) | 4.33 x 2.95 x 0.79 inches |
| Item Weight | 7 ounces (0.2 Kilograms) |
| Operating Voltage | DC 12 Volts |
| User Capacity | Up to 1000 cards/PINs |
| Card Type | 125KHz ID Cards |
| Special Features | Passcode Unlock, Anti-tamper Alarm, External Doorbell Support |
| Display Type | LCD or LED |

Image: Product Dimensions
6. Setup
6.1 Mounting
- Choose a suitable mounting location, typically near the door to be controlled. Ensure it is protected from direct weather exposure if installed outdoors.
- Mark the drilling points for the mounting screws using the backplate as a template.
- Drill holes and insert wall plugs if necessary.
- Secure the backplate to the wall.
6.2 Wiring
Important: Disconnect all power before performing any wiring connections.

Image: Wiring Terminal Block

Image: Wiring Diagram of the Access Control System
Refer to the wiring diagram above and the terminal block image for connections. Common connections include:
- +12V and GND: Connect to a DC 12V power supply.
- NO/PUSH, COM, NC: Connect to your electric lock (e.g., magnetic lock, electric strike).
- OPEN: Connect to an exit button.
- BELL, BELL: Connect to an external doorbell chime.
6.3 Initial Power-Up
- After completing all wiring, apply DC 12V power to the unit.
- The keypad will emit a beep, and the indicator lights will flash, indicating successful power-up.
- The default Master Code is typically 123456. It is highly recommended to change this immediately after initial setup.
7. Operating Instructions
7.1 Programming Mode
To enter programming mode: Press * then enter the Master Code (default: 123456) then press #. The red LED will illuminate.
To exit programming mode: Press *. The red LED will turn off.
7.2 Change Master Code
- Enter Programming Mode.
- Press 0.
- Enter your new 6-digit Master Code.
- Press # to confirm.
- Exit Programming Mode.
7.3 Adding User Cards/PINs
The system supports up to 1000 users.
- Enter Programming Mode.
- Press 1 to add a user.
- For Card Only Access: Present the ID card to the keypad. The keypad will beep, and the card is added.
- For PIN Only Access: Enter a 4-6 digit PIN, then press #. Repeat the PIN and press # again to confirm.
- For Card + PIN Access: Present the ID card, then enter a 4-6 digit PIN, then press #. Repeat the PIN and press # again to confirm.
- To add more users, repeat step 3 or 4.
- Exit Programming Mode.
7.4 Deleting User Cards/PINs
- Enter Programming Mode.
- Press 2 to delete a user.
- To Delete by Card: Present the ID card to the keypad. The keypad will beep, and the card is deleted.
- To Delete by PIN: Enter the 4-6 digit PIN, then press #.
- To delete more users, repeat step 3 or 4.
- Exit Programming Mode.
7.5 Accessing the Door

Image: User Interacting with Keypad
- Card Only: Present your registered ID card to the keypad. The green LED will flash, and the door will unlock.
- PIN Only: Enter your registered 4-6 digit PIN, then press #. The green LED will flash, and the door will unlock.
- Card + PIN: Present your registered ID card, then enter your 4-6 digit PIN, then press #. The green LED will flash, and the door will unlock.
7.6 Doorbell Function
Press the doorbell button (bell icon) on the keypad to activate the external doorbell chime (if connected).

Image: Doorbell Button
7.7 Anti-Tamper Alarm
If the keypad is forcibly removed from its mounting location, the built-in anti-tamper switch will trigger a loud alarm. To silence the alarm, re-secure the keypad or enter the Master Code.
8. Maintenance
- Clean the keypad surface with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Regularly check wiring connections for any signs of wear or damage.
- Ensure the keypad is securely mounted to prevent accidental tampering.
9. Troubleshooting
- Keypad is unresponsive: Check power supply connections. Ensure DC 12V is correctly applied.
- Door does not unlock:
- Verify the ID card or PIN is correctly registered.
- Check wiring to the electric lock. Ensure COM, NO/PUSH, NC connections are correct for your lock type.
- Confirm the power supply is adequate for both the keypad and the lock.
- Anti-tamper alarm triggers unexpectedly: Ensure the keypad is firmly attached to its mounting surface and the anti-tamper switch is properly engaged.
- Cannot enter programming mode: Double-check the Master Code. If forgotten, a factory reset may be required (refer to advanced programming instructions, not covered in this basic manual).
10. Warranty and Support
For warranty information or technical support, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.





