Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of your Scimagic-RC 4-Channel Smart Relay Module. This versatile device allows you to remotely and automatically control up to four electrical appliances using a smartphone application (Tuya Smart, Smart Life, eWelink, or Zigbee, depending on the model), RF remote control, or voice commands via smart assistants like Amazon Alexa and Google Home. It supports various working modes including inching, self-locking, and interlock, making it suitable for a wide range of smart home applications.
Safety Information
- Ensure all wiring is performed by a qualified electrician and in accordance with local electrical codes.
- Always disconnect power before installing or servicing the device.
- Do not exceed the maximum current and power ratings specified for the device.
- Keep the device away from water and high humidity environments.
- Do not attempt to disassemble or modify the device.
- Use only with compatible power sources as specified.
Specifications
| Feature | Specification |
|---|---|
| Brand Name | Scimagic-RC |
| Model Number | Smart Relay Module |
| Compatibility | All Compatible |
| Communication Method | RF, Wi-Fi |
| Camera Equipped | No |
| Origin | Mainland China |
| Certification | CE |
| Input Voltage 1 (AC) | AC 85-250V |
| Input Voltage 2 (AC/DC) | AC/DC 7V-32V |
| Max. Current | 10A/gang, 16A/Total |
| Max. Power | 2000W/10A/gang, 3500W/16A/Total |
| Operating Humidity | 40% ~ 80% RH |
| Working Temperature | -20 degrees to +70 degrees Celsius |
| Control Methods | APP, 433MHz Remote, Voice Control |
| Supported Apps | Smart Life / Tuya Smart / eWelink / Zigbee |
| Voice Assistant Compatibility | Work with Alexa, Work with Google Home |
| Dimensions | Approx. 112*83*26 mm (4.41*3.27*1.02 inches) |
| Relay Life | More than 1,000,000 operations |
Package Contents
- 1 x Scimagic-RC 4-Channel Smart Relay Module (Tuya, eWelink, or Zigbee version as selected)
- 1 x User Manual (this document)
- (Optional: RF Remote Control, depending on purchase bundle)
Setup Instructions
1. Wiring the Smart Relay Module
Ensure power is disconnected before proceeding with any wiring. The module supports two main input voltage ranges: AC 85-250V and AC/DC 7V-32V. Choose the appropriate module version for your application.
AC Motor Wiring Diagram (85-250V Input)

General Wiring Diagram (AC/DC 7-32V Input)

2. App Installation and Device Pairing
The specific app depends on your module version (Tuya, eWelink, or Zigbee). Ensure your smartphone or tablet is connected to a 2.4GHz Wi-Fi network and Bluetooth is enabled.
Tuya Smart / Smart Life App Pairing
- Reset the device: Power on the device. If the network indicator (red light) is blinking fast (0.5s/time), skip this step. Otherwise, hold down the Manual switch (any of K1-K4) for 5 seconds until the network indicator (red light) blinks fast.
- Register/Login: Register a Tuya Smart account if you don't have one, or log in.
- Add Device: In the top right corner of the Tuya Smart app, click the "+" icon. Then click "Auto Scan" or select the device type manually.
- Connect to Wi-Fi: Select your 2.4GHz Wi-Fi network and enter its password.
- Device Added: Wait for the app to discover and add the device. Once added successfully, return to the main interface.

eWeLink App Pairing
- Power on the device.
- Open the eWeLink app. Tap the "+" icon to add a device.
- Select "Quick Pairing" or the appropriate pairing method.
- Enter your 2.4GHz Wi-Fi network name and password.
- The app will search for nearby devices. Once found, confirm the device.
- The device will be added successfully.

Zigbee App Pairing (via Tuya Zigbee Gateway)
- Prerequisite: You need to have a Zigbee gateway already set up in your Tuya Smart app.
- Reset the device: After installation, power on the device. If the device's network indicator is not flashing, press and hold any manual switch for 8 seconds to reset the device.
- Add Subdevice: In the Tuya Smart app, click on your Zigbee gateway card. Then click "Add subdevice".
- Discovery: Wait for about 1 minute until the device is found, then click "Done".
- Added Successfully: Return to the main interface of Tuya, you can see the newly added device.

3. RF Remote Control Pairing
This applies to modules with RF 433MHz support. Only 433MHz Learning code remotes are supported.
- Matching: Hold the RF Pairing button on the module for 3 seconds until the RF pairing indicator (blue light) is on.
- Then long press the remote control button you want to match.
- Loosen the remote control buttons; matching is successful.
Note: Match other buttons by repeating steps 1 to 3.
- Clear Code: Long press the RF pairing button for 15 seconds (RF pairing indicator is always on). Loosen the RF pairing button until the RF pairing indicator (blue light) is off. This clears all paired remotes.

Operating Instructions
1. App Control
Once paired, you can control the relay module via the respective app (Tuya Smart, Smart Life, eWelink, or Zigbee).
- ON/OFF Control: Tap the ON/OFF buttons for each of the 4 channels to toggle connected appliances.
- Timing Function: Set schedules for automatic ON/OFF operations. This includes countdowns, single-event timings, and repeating schedules.
- Scene Creation: Create custom scenes to automate actions based on various conditions (e.g., turn on lights when you arrive home, or based on temperature/humidity).
- Sharing Function: Share control of the device with family members through the app.


2. Voice Control
Integrate your smart relay module with Amazon Alexa or Google Home/Assistant for hands-free control.
- Link Account: Follow the instructions in your Alexa or Google Home app to link your Tuya Smart/Smart Life/eWeLink account.
- Voice Commands: Use commands like "Alexa, turn on the light" or "Hey Google, turn off the garage door."

3. Working Modes
The module supports three working modes: Inching, Self-locking, and Interlock. These modes define how the relays behave when activated.
- Inching Mode: The relay turns on for a set duration (configurable in the app) and then automatically turns off. Ideal for momentary actions like opening a garage door.
- Self-locking Mode: The relay toggles its state with each activation (ON/OFF). Press once to turn on, press again to turn off.
- Interlock Mode: When one relay is turned ON, all other relays in the group automatically turn OFF. This is useful for controlling devices where only one can be active at a time (e.g., motor direction).
You can typically switch between these modes within the device settings in your smart home app.
Maintenance
- Keep the device clean and free from dust. Use a dry, soft cloth for cleaning.
- Avoid exposing the device to extreme temperatures or direct sunlight.
- Regularly check wiring connections to ensure they are secure.
- Periodically update the device firmware via the app to ensure optimal performance and security.
Troubleshooting
- Device Offline: Check your Wi-Fi connection (ensure it's 2.4GHz). Try restarting your router and the smart relay module. Re-pair the device if necessary.
- App Control Not Responding: Ensure your phone has an internet connection. Check the device status in the app. If the device is online but not responding, try restarting the module.
- RF Remote Not Working: Ensure the remote is paired correctly. Repeat the pairing process if needed. Check the remote's battery.
- Relay Not Activating: Verify the wiring connections are correct and secure. Check the power supply to the module. Ensure the connected appliance is functioning correctly.
- Difficulty Pairing: Make sure the device is in pairing mode (network indicator blinking fast). Ensure your phone's Bluetooth is enabled for initial discovery (if applicable).
Solutions for the failure of product matching and offline:
Enter the homepage of the App, click the icon in the lower right corner of the interface to enter settings or troubleshooting options. Look for options related to device status, network diagnostics, or re-pairing.
User Tips
- For optimal performance, place the smart relay module within a reasonable range of your Wi-Fi router or Zigbee gateway.
- When using the timing function, consider setting a small buffer time (e.g., 1-2 minutes) to account for network delays.
- Utilize the 'Family Sharing' feature to allow multiple household members to control smart devices, enhancing convenience for everyone.
- Experiment with different working modes (inching, self-locking, interlock) to find the best fit for each connected appliance.
- Regularly check for app updates to ensure you have the latest features and security patches.
Warranty and Support
For warranty information and technical support, please refer to the seller's policy or contact the vendor directly. Keep your purchase receipt as proof of purchase.





