1. Introduction
The Asia-Teco SN-503 is a versatile smart lock fingerprint keypad module designed for renovating old door locks and standalone access control systems. It integrates various unlocking methods including mobile Bluetooth, remote electronic keys, password, fingerprint, and IC card. This module is powered by a Telink (TLSR8251) Bluetooth chip, supporting low-power Bluetooth (BLE5.0) for seamless mobile app management.
Figure 1: SN-503 Smart Lock Module Set
2. Setup and Installation
2.1 Component Overview
Figure 2: SN-503 Module Components
The SN-503 module set typically includes:
- Main control board (SN-503-14-1)
- Smaller relay/wiring port board
- Fingerprint sensor
- Horn/buzzer
- Keypad/touch button backlight interface
- Various connecting cables
- USB backup power interface
2.2 Wiring Diagram
Carefully follow the wiring diagram below for proper connection of all components. Incorrect wiring may damage the module or prevent proper operation.
Figure 3: Detailed Wiring Diagram
Key interfaces to connect:
- Anti prying interface: For security features.
- Touch button backlight: Connects to the keypad for illumination.
- Fingerprint interface: Connects the semiconductor fingerprint sensor.
- Horn interface: Connects the buzzer for audio feedback.
- Button board interface: Connects the main keypad board.
- Motor interface: Connects to the door lock motor.
- USB backup power interface: For emergency power or programming.
- Relay: For controlling the lock mechanism.
- Wiring port: Main connection point for external wiring.
2.3 App Installation
The SN-503 module supports various mobile applications for management, including "Sciener", "TTLock", and "TTRENTING".
- Download the preferred app (e.g., TTLock) from your device's AppStore, "APPGallery", or by scanning the QR code provided in the product packaging or official documentation.
- Install the app on your Android (4.3 and above) or iOS (7.0 and above) mobile phone.
- Follow the in-app instructions to create an account and pair your SN-503 module via Bluetooth.
3. Operating Instructions
The SN-503 module offers multiple convenient ways to unlock your door.
3.1 Mobile Bluetooth Unlocking
Based on low-power Bluetooth technology, you can easily unlock the door using the mobile app.
- Ensure Bluetooth is enabled on your mobile phone.
- Open the paired smart lock app (e.g., TTLock).
- Within the app, select the lock and tap the unlock icon.
Figure 4: Mobile Bluetooth Unlocking
3.2 Remote Distribution of Electronic Keys (eKeys)
Electronic keys can be sent to tenants or authorized users at any time. The validity period for each eKey can be flexibly set (start time and end time), and eKeys can also be frozen or thawed as needed.
- In the app, navigate to the eKey management section.
- Generate a new eKey and specify its validity period.
- Share the eKey with the recipient via the app's sharing options.
Figure 5: Remote eKey Distribution
3.3 Password Unlocking
Locks can be unlocked by touching the numeric keypad and entering a password that is valid for a certain period of time.
- Touch the keypad to activate it.
- Enter your valid password.
- Press the '#' key (or equivalent) to confirm.
Figure 6: Password Unlocking
3.4 Fingerprint Unlocking
You can use registered fingerprints to open the door.
- Place your registered finger on the semiconductor fingerprint sensor.
- The lock will verify your fingerprint and unlock if authorized.
Figure 7: Fingerprint Unlocking
3.5 IC Card Unlocking
The module supports Mi-fare one M cards for unlocking.
- Present a registered IC card to the card reader area on the module.
- The lock will verify the card and unlock if authorized.
Figure 8: IC Card Unlocking
3.6 Unlock Record Query
All unlocking records (passwords, IC cards, fingerprints, and app unlocks) are recorded. After operating the door lock on any mobile app, connecting to the network, and synchronizing information, all unlocking records can be viewed on the administrator app.
Figure 9: Unlock Record Query
4. Maintenance
- Cleaning: Use a soft, dry cloth to clean the keypad and fingerprint sensor. Avoid abrasive cleaners or solvents.
- Battery Replacement: The module is powered by 4 alkaline dry batteries. Replace them when the low voltage alarm (4.8V) is triggered to ensure continuous operation.
- Firmware Updates: The door lock supports firmware upgrades. Regularly check the app for available updates to enhance functionality and security.
5. Troubleshooting
- Lock not responding: Check battery levels. Ensure the module is properly powered.
- Fingerprint not recognized: Ensure your finger is clean and dry. Re-register your fingerprint if issues persist.
- IC card not working: Ensure the card is registered. The chip reader is integrated into the module's design, typically near the keypad or a designated area for card swiping.
- App connectivity issues: Ensure Bluetooth is on and your phone is within range. Restart the app or your phone if necessary.
- Unlocking records not syncing: Ensure your mobile phone has an active internet connection and the app is connected to the lock via Bluetooth.
6. Specifications
Figure 10: Detailed Product Specifications
| Attribute | Value |
|---|---|
| Brand Name | Asia-Teco |
| Model Number | SN-503 |
| Item Type | Exit Button |
| Bluetooth Standard | Bluetooth 5.0 BLE |
| Supported Mobile Phone Systems | Android 4.3/IOS 7.0 and above |
| Power Supply Mode | 4 alkaline dry batteries |
| Low Voltage Alarm Voltage | 4.8V |
| Voltage Range | 4.5~9V |
| Standby Current | 100 microamperes |
| Working Current | Less than 200mA |
| Unlocking Time | 1.5 seconds |
| Working Temperature Range | -20~70 degrees Celsius |
| Key Type | Capacitive touch button |
| Custom and Permanent Passwords | 250 pieces |
| Other Dynamic Passwords | Unlimited |
| Supported Card Types | Mi-fare one M card |
| Number of IC Cards | 1000 sheets |
| Unlocking Method | App, Password, Fingerprint, IC card, Mechanical key, Remote control (optional) |
| Fingerprint Sensor Type | Semiconductor Fingerprint Sensor |
| Fingerprint Capacity | 120 pieces (adjusted according to actual usage model) |
| False Recognition Rate (FAR) | <0.001% |
| Rejection Rate (FRR) | <1.0% |
6.1 Dimensions
Figure 11: Module Dimensions (Main board: 90mm x 52mm; Smaller board: 24mm x 61mm)
7. User Tips
- For optimal performance, ensure the module is installed in a location with good Bluetooth signal reception if using app-based unlocking.
- When setting up passwords or eKeys, always use strong, unique combinations and manage their validity periods carefully for enhanced security.
- Regularly check the app for any notifications regarding low battery or system updates.
8. Warranty and Support
8.1 Warranty Information
We provide a one-year warranty from the date of original purchase. The warranty does not cover defects caused by buyer misuse, fire, or other similar incidents. If the product is damaged due to buyer actions, any shipping fees for warranty service will be borne by the buyer.8.2 Contact Us
If you have any questions or require support, please send a message via the trade manager. All messages will be answered within 24 hours from Monday to Saturday. Please contact us before leaving any negative or neutral feedback or opening disputes; we will work with you to solve any problems.