1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the CDVI 433MHz Radio Keypad (Digicode) and its associated SEL2641R433NN 1-Relay 12V Receiver. This system is designed for secure access control applications.
Please read this manual thoroughly before attempting any installation or operation to ensure proper functionality and safety.

Figure 1: CDVI 433MHz Radio Keypad and SEL2641R433NN Receiver. The image shows the silver-colored keypad with illuminated blue numbers (0-9, A, B, C) and a transparent plastic receiver unit.
2. Safety Information
- Ensure all power is disconnected before installation or maintenance.
- Installation should be performed by qualified personnel only.
- Do not expose the keypad or receiver to extreme temperatures, moisture, or direct sunlight.
- Use only specified power supply (12V).
- Keep out of reach of children.
3. Setup and Installation
3.1. Components Overview
The system consists of two main components:
- Radio Keypad (Digicode): The input device for entering access codes.
- SEL2641R433NN Receiver: The unit that receives signals from the keypad and controls the access mechanism (e.g., door lock).
3.2. Mounting the Keypad
- Choose a suitable mounting location, typically near the access point, ensuring it is protected from direct weather exposure if outdoors.
- Mark the drilling points using the keypad's mounting plate as a template.
- Drill holes and insert appropriate wall plugs.
- Secure the mounting plate to the wall.
- Attach the keypad securely to the mounting plate.
3.3. Wiring the Receiver
The SEL2641R433NN receiver requires a 12V power supply and connection to the access control device. Refer to the wiring diagram below for typical connections.
- Power Input: Connect 12V DC to the designated terminals. Observe polarity.
- Relay Output: The receiver has one relay. Connect the Normally Open (NO) or Normally Closed (NC) contacts to your access control device (e.g., electric strike, magnetic lock) as required.
(Note: A detailed wiring diagram is typically provided with the physical product. Consult it for specific terminal assignments.)
4. Operating Instructions
4.1. Initial Power-Up
Once the receiver is wired and powered, it will enter a standby mode. The keypad will illuminate when a button is pressed.
4.2. Programming Access Codes
The keypad and receiver must be paired, and access codes programmed. This process typically involves:
- Entering Programming Mode: This usually involves a master code or a physical button on the receiver.
- Adding New Codes: Follow the specific sequence to input new user codes (e.g., Master Code + * + New Code + #).
- Deleting Codes: Follow the specific sequence to remove existing user codes.
- Exiting Programming Mode: Save changes and exit programming mode.
(Note: Refer to the specific programming instructions provided with your product for exact key sequences and procedures, as these can vary by firmware version.)
4.3. Granting Access
To grant access, simply enter a valid programmed code on the keypad. Upon successful code entry, the receiver's relay will activate for a pre-set duration, unlocking the connected device.
5. Maintenance
- Cleaning: Clean the keypad surface with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Regular Checks: Periodically check all wiring connections for security and integrity, especially for the receiver unit.
- Code Management: Regularly review and update access codes for security purposes. Delete codes of former users.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Keypad not responding. | No power to receiver or keypad not paired. | Check 12V power supply to receiver. Ensure keypad is correctly paired with the receiver. |
| Access code not working. | Incorrect code entered, code not programmed, or keypad/receiver not paired. | Verify code. Re-program code. Re-pair keypad and receiver. |
| Door/lock not activating. | Incorrect wiring to lock, faulty lock, or relay issue. | Check wiring connections. Test the lock mechanism independently. Consult a technician if relay is suspected faulty. |
| Short range or intermittent operation. | Radio interference or receiver antenna issue. | Check for sources of radio interference. Ensure receiver antenna is unobstructed. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Numbers | SEL2641R433NN, GALEOR1R, F1002000052 |
| Frequency | 433MHz |
| Receiver Power Supply | 12V DC |
| Relay Output | 1 Relay (NO/NC contacts) |
| Keypad Type | Radio (Wireless) |
| ASIN | B06VWH6V57 |
8. Warranty and Support
Information regarding product warranty is typically provided with the purchase documentation or can be found on the manufacturer's official website. Please retain your proof of purchase for warranty claims.
For technical support or further assistance, please contact CDVI customer service or your authorized dealer. Contact details can usually be found on the CDVI website (www.cdvi.com).





