Dry Contact Relay 4-channel WiFi + RF433 Tuya 230V or 5V microUSB Power Supply
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4-channel WiFi + RF433MHz Tuya Controller with Dry Contact Outputs
A versatile, 4-channel WiFi + RF 433 MHz controller with dry contact outputs, fully compatible with the Tuya and Smart Life ecosystems. It's perfect for adding "smart" functionality to devices you already own. With its compact dimensions and flexible 230V AC power supply, the module can be easily integrated into controllers for gates, garage doors, heating furnaces, blinds, irrigation systems, and many other installations.
Key Features:
- 4 independent channels with relay contacts: NC / NO / COM (dry contact outputs)
- 2.4 GHz WiFi and RF 433 MHz connectivity (fixed-code remotes)
- Full integration with Tuya and Smart Life applications
- 3 operating modes: Normal, Interlock, and Momentary
- Power supply: 5V DC (micro USB) or 230V AC
- Option for DIN rail mounting
- Reverse polarity protection for power supply
- Works with Google Assistant and Amazon Alexa
Flexible Operating Modes (set in the app)
- Normal Mode – Each of the four relays is controlled independently (ON/OFF).
- Interlock Mode – Only one channel is active at any given time; turning one on turns the others off. Ideal for controlling motors and blinds.
- Momentary Mode – The relay automatically turns off after a defined time (time is set in Tuya scenes). Works well for gates and wicket doors, among other things.
Tuya Application Capabilities
The Tuya platform offers a rich set of functions configurable from your smartphone:
- Schedules – Weekly automation.
- Timer – One-time, automatic channel deactivation after a set time.
- Sharing – Grant control to other household members.
- Power-off state – Choose: on, off, or last state remembered.
- Voice control – Integration with Google and Alexa.
Technical Specifications:
- Power supply: 5V DC (micro USB) or 230V AC
- WiFi: 2.4 GHz (IEEE 802.11 b/g/n)
- RF: 433 MHz (fixed-code remotes)
- Wireless Module: WB3S
- Number of channels: 4
- Outputs: dry contact, relay (NC/NO/COM)
- Mounting: DIN rail mounting possible
- Dimensions: 81 × 76 × 28 mm
Module Dimensions
Connection Method
1. Common power source for the controller and load
The simplest diagram, where the module and the load are powered by the same AC voltage.
2. Controller powered by USB, load from a separate source
Use this when the load operates at a different voltage (e.g., 24V AC). The controller is powered by a stable 5V DC (micro USB), and the dry contact outputs safely switch the external circuit.
Pairing and Operation
Adding to the Tuya / Smart Life app:
After applying power, the red LED flashes – the device is in pairing mode. Open the app, press the "+" in the top right corner, and follow the instructions. If the controller has already been paired, hold the Reset button for about 10 seconds until the LED starts flashing again.
Adding and deleting RF 433 MHz remotes:
Everything is configured in the device settings in the Tuya app – select the appropriate function and follow the on-screen prompts.
Package Contents
- 4-channel WiFi + RF433 MHz controller (Tuya / Smart Life)
Requires a 2.4 GHz WiFi network – the device does not work with 5 GHz networks.
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