SWITNEX Smart WiFi Relay Module 1CHx4-TEW User Manual
SWITNEX Smart WiFi Relay Module 1CHx4-TEW User Manual
| Technical Data | |
|---|---|
| Model Number | EW748 / 1CHx4-TEW |
| Dimensions (L x W x H) | 55 x 29 x 17 mm (2.2 x 1.1 x 0.7 inches) |
| Input Voltage | DC 5V (via USB) or DC 7V-48V |
| Relay Contact Rating | 10A (AC 250V, DC 30V) |
| Power Consumption | 480 Watts (Max) |
| Wireless Standard | Wi-Fi 2.4 GHz |
| Control Methods | eWelink APP, Bluetooth Remote, Voice Control (Alexa/Google Home) |
| Operating Modes | Inching (Momentary), Self-Locking (Toggle) |
| Material | Plastic |
| Certification | CE |
| Bluetooth Remote | RM2.4G (included), with 4 channel buttons + ALL ON/ALL OFF |
Product Detail
- Smart WiFi Relay Module – compact design (55x29x17 mm)
- Bluetooth RM2.4G remote control – 4 numbered buttons, ALL ON, ALL OFF
- Relay output terminals: NO (Normally Open), COM (Common), NC (Normally Closed) – dry contacts
- Power input options: Micro USB (DC 5V/0.5A) or terminal block (DC 7V-48V)
- Pairing button – also called “Open key” for Wi-Fi pairing
- Relay indicator light – shows relay state
- WiFi network indicator light – shows connection status
Wiring Diagram
- Power input (DC 7V-48V): Connect positive (+) to VIN, negative (-) to GND
- Power input (USB): Connect micro USB cable (5V/0.5A)
- Relay output (dry contact): Connect device control circuit to NO/COM/NC
- Example: For DC device with DC 7V-48V, connect power source to VIN/GND, device to COM/NO
- Example: For AC/DC device (1V-250V), connect external power through COM/NO
Warning
- Always disconnect power before performing any wiring or maintenance.
- Do not exceed the maximum relay rating of 10A at 250V AC or 30V DC.
- Ensure the input voltage is within DC 5V (USB) or DC 7V-48V (terminal).
- Install in a dry, well-ventilated area away from moisture and extreme temperatures.
- Use a qualified electrician if unsure about wiring.
- The module supports 2.4 GHz Wi-Fi only (does not work with 5 GHz networks).
Operating Mode
The module supports two primary operating modes, configurable in the eWelink app.
Inching Mode (Momentary)
When triggered, the relay activates for a set duration (0.5 to 3600 seconds) and then automatically deactivates. Suitable for garage door openers or pulse-triggered devices.
How to configure: In eWelink app, select Inching mode and set desired duration.
Self-Locking Mode (Toggle)
Acts like a standard on/off switch – one trigger turns the relay ON, another trigger turns it OFF. Suitable for lights, fans, and continuous control.
How to configure: In eWelink app, select Self-Locking mode.
APP Control (eWelink)
- Download eWelink app (Android/iOS) from app store or scan QR code.
- Create an account and log in.
- Power on the module.
- Tap ’+’ to add device.
- Press and hold the pairing button on the module until the WiFi indicator blinks rapidly.
- Follow in-app prompts to connect to your 2.4 GHz Wi-Fi network.
- Once paired, you can:
- Turn devices on/off
- Set schedules and timers
- Configure operating modes
- Share control with family members
Bluetooth Remote Control
The included RM2.4G Bluetooth remote allows local operation:
- Buttons 1-4 – control corresponding relay channels (or functions)
- ALL ON – turns all connected devices on
- ALL OFF – turns all connected devices off
The remote is typically pre-paired. If re-pairing is needed, follow the eWelink app instructions.
Voice Control (Alexa / Google Home)
- Link your eWelink account to Amazon Alexa or Google Home through their respective apps.
- Discover devices.
- Use voice commands such as:
- “Alexa, turn on the light”
- “Hey Google, turn off the fan”
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Module not powering on | Incorrect power supply; Loose wiring | Verify DC 5V USB or DC 7V-48V connection; Check cables |
| Unable to connect to Wi-Fi | 5 GHz network; Wrong password; Out of range | Use 2.4 GHz Wi-Fi; Check password; Move closer to router; Reset and re-pair |
| App control not responding | Internet down; Module disconnected | Check smartphone internet; Ensure WiFi indicator is solid; Restart app |
| Voice control not working | Account not linked; Wrong device name | Link eWelink account in Alexa/Google Home; Verify device name in app |
| Bluetooth remote not working | Battery low; Out of range; Not paired | Replace battery; Move closer; Re-pair via eWelink app |
Maintenance
- Cleaning: Wipe with a dry, soft cloth. Do not use liquid cleaners.
- Ventilation: Ensure adequate airflow around the module.
- Avoid moisture: Keep dry and away from humidity.
- Secure connections: Periodically check wiring for looseness or corrosion.
- Firmware updates: Check eWelink app for available updates.
Contact
- WhatsApp: +86 15812381273
- Email: linktrol@icloud.com
If there is any question about the products, please contact us first. We will do our best to solve your problem. Thank you.
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