Electronic lock CH4 Tuya Smart encryption

Key Features

1. Integration with the Tuya application - Ability to remotely manage users, PIN codes and events from your phone.

2. Multifunctional access control - PIN codes, 125 kHz proximity cards, as well as operation mode as a controller or Wiegand reader.

3. Supports up to 10,500 users - Perfect for home and corporate facilities.

4. High resistance and durability (IP66) - Waterproof and durable housing allows installation outdoors - in rain, frost and heat, without the risk of damage.

5. Touch-sensitive, backlit keyboard - Comfortable code entry in the dark thanks to the backlight that automatically activates when touched.

6. Advanced security - Possibility of PIN masking, alarm after incorrect attempts and anti-sabotage protection.

7. Flexible relay configuration - Select pulse (e.g. 5 s) or toggle (ON/OFF) mode, matching the operation to the given electric lock.

8. Possibility of connecting an exit button (REX) - Easy exit from the room from the inside without using a PIN or card.

9. LED and buzzer indication - A colored LED and sounds inform about each status of the device - opening, error, alarm or programming.

10. Quick Card Add Mode - When this feature is enabled, each card presented automatically opens the door and registers as a user - ideal for mass card issuance.

Tuya Smart app

Tuya Smart allows you to fully control your CH4 smart lock from your phone . It allows you to remotely open doors , manage users, and quickly add access methods like PINs, RFID cards, or temporary codes that can be shared with guests or employees .

The app also allows you to view opening and alarm history , set lock operating parameters (e.g., automatic lock, alarm, volume), and manage home devices . Make sure there's network coverage where the lock is installed. Wi-Fi, it is necessary for proper operation.

Access control system connection description

The diagram shows the connection of the 12V power supply, electric lock, exit button, bell and Wiegand inputs.

1. Power supply

• DC+ (red) – +12V
• GND (black) – ground Powers the controller and lock.

2. Electric lock

The controller provides a relay output:

• NC (orange) – for fail-safe locks (e.g. magnetic, opens after a power failure)
• NO (blue) – for fail-secure locks (electric strikes that open when powered). The lock uses the same 12V power supply. A 1N4004 diode is recommended.

3. Exit button

• OPEN (yellow) – button signal
• COM (purple) – ground Allows the door to be opened from the inside.

4. Bell

• Doorbell+ (gray)
• Doorbell – (Brown) When connected, allows you to trigger a sound upon entry.

5. Wiegand input

• D0 (green)
• D1 (white) For connecting an external card reader or keyboard.

6. Other uses

The relay output (NC/NO/COM) can also control a gate, automatic door, solenoid valve or other device requiring an impulse.

Technical specifications

• Power supply: 12V DC
• Current consumption: ≤150 mA (operation), ≤100 mA (standby)
• Operating modes: Standalone mode, Controller mode, Wiegand reader mode
• Protection class: IP66
• Opening modes: ID Card: 125 kHz, PIN Code (4-6 digits), Master Card
• Card reading: ID 125 kHz
• Reading range: 2–6 cm
• User capacity: 10,000 (9,990 permanent + 10 temporary)
• Wiegand formats: EM 26–44 bits (input and output)
• PIN Output: 4 bits / 8 bits ASCII / 10 virtual digits
• Relay: NO/NC/COM, time 0–99 s, max load 2 A
• LED signaling: Tri-color (red, orange, green)
• Buzzer: Yes, programmable
• Alarms: False attempts alarm, tamper alarm (LDR)
• Keyboard Backlight: Yes (Auto / ON / OFF)
• Lock Protection: 1N4004 diode required (included)
• User support: Adding cards/PIN, deleting, block adding cards, user transfer
• Operating temperature: -40°C to +60°C
• Operating humidity: 0–98% RH
• Material: ABS
• Color: Silver and black
• Dimensions: 140 x 45 x 20 mm
• Weight: 95 g

The set includes

• 1x Electronic lock CH4 Tuya Smart
• 1x Set of installation cables
• 1x Set of mounting accessories
• 1x User Manual