1. Introduction
The Scimagic-RC 2CH Smart Wireless Switch Module is a cost-effective device designed for smart home automation. It features a WI-FI control module that allows you to control connected appliances from anywhere using the EWeLink mobile application. This module supports various operating modes, including Inching, Self-locking, and Interlock, making it versatile for controlling lights, electric kettles, rice cookers, electric curtains/doors, and reversing motors. It also integrates with popular voice assistants like Amazon Alexa and Google Home, and supports IFTTT for enhanced automation.
2. Safety Information
- Ensure all power is disconnected before installation or maintenance to prevent electric shock.
- Installation should be performed by a qualified electrician or a person with sufficient knowledge of electrical systems.
- Do not expose the device to moisture, extreme temperatures, or corrosive environments.
- Verify that the power supply voltage matches the device's specifications (AC/DC 7-32V or AC 85-250V).
- Do not exceed the maximum load capacity of 10A/2200W per channel or total.
- Keep the device away from children.
3. Package Contents
- 1 x 2CH WIFI Switch Module
- 1 x Instruction Manual
Note: Remote controls are sold separately and do not include batteries.
4. Specifications
| Feature | Specification |
|---|---|
| Model Number | EWeLink 2CH Smart Wireless switch module |
| Brand Name | Scimagic-RC |
| Power Supply | AC or DC 7-32V / AC 85-250V (optional) |
| Total Load | 10A/2200W |
| Single Load | 10A/2200W |
| Controlled Lines | 2 |
| Working Mode | Inching / Self-locking, Interlock (adjustable) |
| Transmission Mode | Wi-Fi communication |
| Wireless Standard | 2.4GHz, 802.11 b/g/n |
| Mobile App | EWeLink (Android/IOS) |
| Voice Control Compatibility | Amazon Alexa, Google Home, Nest, IFTTT |
| Control Distance | Infinity (via internet) |
| Enclosure Material | Fire-retardant ABS |
| Operating Temperature | -40°C to +70°C |
| Operating Humidity | 40% ~ 80% RH |
| Item Size | 121 x 39 x 25 mm |
| Board Consumption | <1W |
| Standby Current | 80mA |
| Standby Power | <0.5W |
| Input Current | ≤10A |
| Wattage | ≤2200W |
| Relay Lifespan | ≥1,000,000 times |
| Electrical Insulation Resistance | 100MΩ |
| Electric Shock Voltage | 1000V |
| Relay Max Suction Time | 15ms |
| Relay Max Release Time | 5ms |
5. Product Overview
The 2CH Smart Wireless Switch Module features a compact design with clearly labeled components for easy installation and operation.

Figure 5.1: Component Layout (DC/AC 7-32V version)

Figure 5.2: Component Layout (AC 85-250V version)
Key Components:
- Input Terminals: For connecting the power supply (DC/AC 7-32V or AC 85-250V, depending on model).
- USB 5V Input: Alternative power input for some models.
- Match Button / RF Pairing Button / Manual Switch: Used for pairing with RF remotes and for manual control.
- Network Indicator (Red Light): Indicates network status.
- RF Pairing Indicator (Blue Light): Indicates RF pairing status.
- Relay Output Terminals (NC, COM, NO): Normally Closed, Common, and Normally Open contacts for connecting appliances.
6. Installation
6.1 App Download and Device Pairing
To control the smart switch, download the EWeLink app from your Android or iOS app store. Follow the in-app instructions for device pairing. The following video demonstrates the pairing process:
Video 6.1: Device Pairing and Control Demonstration
6.2 Wiring Diagrams
Ensure power is OFF before wiring. Connect your appliances to the relay output terminals (NC, COM, NO) according to the desired function and the specific wiring diagram for your application.

Figure 6.2.1: Wiring for a Lamp (220V AC Input)

Figure 6.2.2: Wiring for a 4-Wire AC Motor (85-250V Input)
Note: For 4-wire AC motors, you need to set the module to Interlock mode in the EWeLink app.

Figure 6.2.3: Wiring for a DC Motor (7-32V Input)
Note: For DC motors, you need to set the module to Interlock mode in the EWeLink app.

Figure 6.2.4: Wiring for a 3-Wire AC Motor (85-250V Input)
Note: For 3-wire AC motors, you need to set the module to Interlock mode in the EWeLink app.
7. Operation
7.1 Working Modes
The smart switch supports three working modes, configurable via the EWeLink app:

Figure 7.1: Three Working Modes
- Inching Mode: When a channel is switched ON, it will automatically switch OFF after a set duration (0.5-3600 seconds). This is useful for momentary actions like opening a gate.
- Self-locking Mode: Each channel operates independently. Switching a channel ON keeps it ON until manually switched OFF. This is like a standard ON/OFF switch.
- Interlock Mode: When one channel is switched ON, all other channels are automatically switched OFF. This prevents simultaneous operation, ideal for motors that move in opposite directions (e.g., open/close).
7.2 App Control
The EWeLink app provides comprehensive control over your smart switch module.

Figure 7.2: App Control Flexibility
- Multiple Device Control: One EWeLink app can manage numerous smart switch modules.
- Shared Device Control: A single smart switch module can be controlled by multiple authorized phones.
7.3 Voice Control
Integrate your smart switch with voice assistants for hands-free control.

Figure 7.3: Voice Control Functionality
The module is compatible with Amazon Alexa, Google Home, and Nest. You can use voice commands to turn connected appliances ON or OFF. For example, say "Alexa, turn on the light" or "Hey Google, close the curtains."
7.4 Scheduling and Timers
Automate your appliances with scheduled timers.

Figure 7.4: Set Your Schedule
You can set up to 8 scheduled, countdown, or loop timers for each device. For example, schedule your water boiler to turn on at 7:30 AM daily.
7.5 Sharing Control
Share access to your smart devices with family members or colleagues.

Figure 7.5: Sharing Function
In the EWeLink app, use the device sharing function to grant permissions to others, allowing them to control the smart switch remotely.
7.6 Setting Interlock Mode on the EWeLink App
To configure Interlock mode for applications like motor control:
- Open the EWeLink app and navigate to the specific device (e.g., "Curtain switch").
- Tap the three dots icon (menu) in the top right corner to access Device Settings.
- Scroll down and find the "Inching Settings" or "Working Mode" option.
- Select "Interlock" and then tap "Enable."

Figure 7.6.1: Setting Interlock Mode (Steps 1 & 2)

Figure 7.6.2: Setting Interlock Mode (Step 3)
8. Troubleshooting
- Device not connecting to Wi-Fi:
- Ensure your Wi-Fi network is 2.4GHz (802.11 b/g/n). 5GHz networks are not supported.
- Check if the Wi-Fi password entered in the EWeLink app is correct.
- Move the device closer to your Wi-Fi router during the pairing process.
- Reset the device to factory settings (refer to the EWeLink app or device instructions for specific reset procedures) and try pairing again.
- Appliance not responding to commands:
- Verify that the smart switch module is powered on and connected to Wi-Fi (check the network indicator light).
- Ensure the appliance is correctly wired to the relay output terminals (COM, NO, NC).
- Check the working mode setting in the EWeLink app (Inching, Self-locking, or Interlock) to ensure it matches your intended operation.
- Confirm that the appliance itself is functional.
- Voice control not working:
- Ensure your smart switch is successfully linked to your Amazon Alexa or Google Home account via the EWeLink app.
- Check your internet connection.
- Use the exact device names configured in the EWeLink app when giving voice commands.
- RF remote not working (if applicable):
- Ensure the RF remote is paired with the module (refer to pairing instructions for your specific remote).
- Check the remote's battery.
9. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Firmware Updates: Periodically check the EWeLink app for available firmware updates to ensure optimal performance and security.
- Environmental Conditions: Avoid exposing the device to direct sunlight, high humidity, or extreme temperatures to prolong its lifespan.
10. Warranty and Support
This product comes with a 1-year warranty from the date of purchase, covering manufacturing defects. For technical support or warranty claims, please contact your retailer or the manufacturer's customer service.





