1. Safety Information
Please observe the following safety precautions to prevent damage to the device or injury to yourself.
- Always disconnect power at the circuit breaker before performing any electrical work.
- Installation should be performed by a qualified electrician or in accordance with local electrical codes.
- Do not attempt to repair or modify the device yourself.
- Ensure the input voltage matches the device specifications (100-250VAC, 50/60Hz).
- This switch is designed for AC motors only. It cannot work with DC motors.
- Verify your motor has 4 wires (Blue Wire, Brown Wire, Black Wire, Green/Yellow Wire) before installation.
- Carefully open the glass panel before wiring to avoid scratching or breaking it.
- Keep the power off before installing the glass panel to prevent malfunction.
2. Package Contents
Please check the box for the following items:

Image: Contents of the package including the curtain switch, user guide, terminal, screws, and blue wire.
- 1 x LoraTap Curtain Switch
- 1 x User Guide (this document)
- 1 x Terminal
- 2 x Screws Kit
- 1 x Blue Wire
3. Specifications
| Feature | Specification |
|---|---|
| Brand Name | LoraTap |
| Model | SC400W-EU |
| Input Voltage | 100-250VAC, 50/60Hz |
| Output Voltage (Motor) | 100-250VAC, 50/60Hz |
| Max Load | 600 W |
| Standby Consumption | Below 0.5W |
| Dimensions | 80mm x 80mm x 30mm |
| Button Type | Push Button |
| Connectivity | 2.4GHz Wi-Fi |
| Color | White |
| Certification | CE, RoHS |
| Battery Included | No |
| Origin | Mainland China |
4. Installation
The LoraTap Curtain Switch is designed for EU standard junction boxes, with dimensions of 80mm x 80mm x 30mm and a mounting distance of 60mm.

Image: Diagram showing the EU standard size of the switch (80x80x30mm) and compatibility with various European junction boxes.

Image: Detailed dimensions of the switch and its backplate, indicating a 60mm mounting screw distance.
4.1 Wiring Instructions
Before starting, ensure the main power supply is turned off at the circuit breaker.

Image: Step-by-step wiring and physical installation guide.
- Step 1: Open the Glass Panel
Carefully open the glass panel using a screwdriver on a flat surface to avoid damage. - Step 2: Wiring for Standard Blinds (4-wire motor)
- Input L (Live Wire): Connect the Red/Brown/Black wire from the AC power.
- Input N (Neutral Wire): Connect the Blue wire from the AC power.
- Output L1: Connect the Brown wire from the motor.
- Output L2: Connect the Black wire from the motor.
- Output N (Neutral Wire): Connect the Blue wire from the motor.
Note: Put both Input Neutral Wire (Blue Wire) and Output Neutral Wire (Blue Wire) into the 'N' position. The switch does not have a terminal for earth wire, so no need to connect the earth wire of the motor.
- Step 2 (Alternative): Wiring for Blinds with Built-in Driver (5-wire motor)
If your motor has a built-in driver with 5 wires (L, L1, L2, N, Earth Wire), follow the same connections as above for L, L1, L2, and N. The earth wire from the motor does not need to be connected to the switch. - Step 3: Connect the Terminal Block
Ensure all wires are securely connected to their respective terminals as per the diagram. - Step 4: Fix the Back Plate
Fix the back plate onto the wall using the provided screws. Ensure the power is still off before proceeding. - Step 5: Attach the Glass Panel
Press the glass panel back onto the back plate until it clicks into place.
4.2 Important Notes Before Installation
- This is a Wi-Fi only Curtain Switch. It is not compatible with RF curtain remotes. Do not purchase additional RF remotes for this switch.
- Ensure your motor is a 4-wire AC motor. This switch is not compatible with DC motors.

Image: Visual reminder of input voltage, output voltage, and the requirement for a 4-wire AC motor.

Image: Illustration showing various RF remote controls and switches that are NOT compatible with this Wi-Fi switch.
5. Operation
The LoraTap Curtain Switch offers multiple ways to control your blinds.
5.1 Push Button Control
The switch features intuitive push buttons for direct control:
- Up Arrow: Opens the curtain/blinds.
- Pause Button: Pauses the curtain/blinds movement.
- Down Arrow: Closes the curtain/blinds.

Image: A hand pressing the up arrow button on the switch to open blinds.
5.2 App Remote Control (Tuya Smart / Smart Life)
Control your blinds from anywhere using the Tuya Smart or Smart Life app on your smartphone.

Image: A smartphone displaying the app interface for controlling curtain movement (Open, Paused, Close).
- Download the App: Search for "Tuya Smart" or "Smart Life" in your app store (available on iPhone App Store and Android App Store).
- Pairing: Follow the in-app instructions to pair your switch with the app.
- Control: Use the app to open, close, or pause your curtains.
- Device Sharing: Create groups in the app to manage multiple blinds and share control with family members.

Image: Illustration of controlling multiple curtain switches simultaneously using the group function in the app.
5.3 Voice Control
The switch is compatible with Amazon Alexa and Google Assistant for convenient voice commands.

Image: A person using voice commands like "Alexa, Open the curtain" to control blinds, with Amazon Echo and Google Home devices shown.
- Connect to Voice Assistant: Link your Tuya Smart/Smart Life account to your Amazon Alexa or Google Assistant app.
- Commands: Use voice commands such as "Alexa, open the curtain" or "Hey Google, close the blinds."
- Note: Alexa currently supports on/off and pause commands, but not percentage-based partial opening.
5.4 Scheduling and Automation
Automate your blinds to open and close at specific times or based on environmental conditions.
- Running Time Setting: Set the motor's running time in the app (e.g., 10-120 seconds) to calibrate full open/close positions.

Image: App interface showing how to set the schedule time for curtain movement, with examples of 10s, 60s, and 120s.
- Timer and Schedule: Create custom schedules to open or close curtains at specified times (e.g., wake up to natural light).

Image: A person stretching in bed with open blinds, and a smartphone screen showing an 'Add Schedule' interface for setting curtain open/close times.
- Sunrise/Sunset Automation: Configure the app to automatically adjust your blinds based on local sunrise and sunset times.

Image: A person sleeping in a room with blinds, and a smartphone screen showing the app interface for setting up Sunrise/Sunset Automation.
6. Maintenance
To ensure the longevity and optimal performance of your LoraTap Curtain Switch, follow these simple maintenance guidelines:
- Cleaning: Wipe the switch surface with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Power Cycles: If the switch becomes unresponsive, try turning off the power at the circuit breaker for a few minutes, then restore power.
- Firmware Updates: Regularly check the Tuya Smart/Smart Life app for any available firmware updates for your switch to ensure you have the latest features and security patches.
- Connection Check: Periodically ensure all wiring connections are secure, especially if you experience intermittent control issues.
7. Troubleshooting
If you encounter issues with your LoraTap Curtain Switch, refer to the following common problems and solutions:
- Switch is unresponsive:
- Ensure the power supply to the switch is active.
- Check wiring connections for looseness or incorrect placement.
- Try restarting the switch by cycling power at the circuit breaker. - App control not working:
- Verify your Wi-Fi network is active and the switch is connected.
- Ensure your smartphone has an internet connection.
- Check if the Tuya Smart/Smart Life app is up to date.
- Re-pair the device with the app if necessary. - Voice control (Alexa/Google Assistant) not working:
- Confirm the switch is successfully paired with the Tuya Smart/Smart Life app.
- Ensure your voice assistant account is linked to your Tuya Smart/Smart Life account.
- Check your internet connection and the status of your voice assistant device. - Motor not responding or moving incorrectly:
- Confirm your motor is a 4-wire AC motor. This switch is not compatible with DC motors.
- Check the motor wiring to the switch (L1, L2, N).
- Calibrate the running time in the app if the blinds are not fully opening or closing. - Partial opening with Alexa:
- Alexa currently only supports on/off and pause commands for this device, not percentage-based partial opening. - Looking for RF 433MHz compatibility:
- This switch is Wi-Fi only and does not support RF 433MHz.
8. User Tips
- Motor Compatibility: Always double-check that your curtain motor is a 4-wire AC motor before purchasing and installing this switch. This is a common point of confusion.
- App Integration: Take advantage of the Tuya Smart or Smart Life app's scheduling and automation features to enhance your daily routine, such as setting blinds to open with your alarm.
- Group Control: If you have multiple smart curtain switches, use the app's group function to control all of them simultaneously with a single command.
- Physical vs. Smart Control: Remember that the physical push buttons on the switch provide immediate control, which can be useful even when smart features are configured.
9. Frequently Asked Questions (FAQ)
- Q: What are the dimensions of the part that goes into the wall?
- A: The size of the bottom part of the product that fits into the wall is 49mm, and its height is 25mm.
- Q: Is it necessary to install an additional module with this electric roller shutter switch?
- A: No, after installation, this product can control the curtain motor directly through the mobile app or by pressing the physical buttons. There is no need to install additional modules.
- Q: Can Alexa perform partial opening (e.g., open to 50%)?
- A: Alexa currently can only voice control the device to turn on/off or pause. It cannot control the device in percentage for partial opening.
- Q: Is there a Zigbee version of this model?
- A: Yes, a Zigbee version of the product is available. Please refer to the product details page for a link to the Zigbee version of the curtain switch.
- Q: Are the pushers tactile or mechanical?
- A: This product features push-button type switches, which are not mechanical switches.
10. Warranty and Support
For detailed warranty information and technical support, please refer to the official LoraTap website or contact your retailer. A comprehensive user manual in PDF format is also available for download from the seller's product page: User manual (PDF).





