1. Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of the SONOFF 4CH Pro R2 Smart Switch. Please read this manual thoroughly before using the device to ensure proper functionality and safety.
Brand: SONOFF
Model: 4CH Pro R2 (4CHPROR3)
The SONOFF 4CH Pro R2 is a 4-gang WiFi switch designed for independent control of up to four home appliances. It supports multiple working modes including interlock, self-locking, and inching, with adjustable delay in inching mode. The device also integrates a 433.92MHz RF receiver for remote control and is compatible with voice assistants like Amazon Alexa and Google Home.
Image: The SONOFF 4CH Pro R2 Smart Switch alongside its product packaging.
2. Key Features
- Independent 4-Channel Control: Remotely turn on/off up to four home appliances independently.
- Multiple Working Modes: Supports interlock, self-locking, and inching modes.
- Adjustable Inching Delay: Set 1-16 second delay in inching mode for pulse-like operation.
- Dual Control Methods: Control via WiFi using the eWeLink app or via 433MHz RF Remote control (sold separately).
- Smart Home Integration: Compatible with Amazon Alexa, Google Home, and IFTTT for voice control and automation.
- Timing Schedules: Create up to 8 single/repeat/countdown timers for automated device control, even offline.
- Flexible Power Input: Supports 90~250V AC and 5~24V DC power supply.
- DIN Rail Mounted: Designed for easy installation on a DIN rail.
Image: Overview of control methods including remote, voice, timing, share, sync status, smart scene, and power on state.
3. Setup and Installation
3.1 Safety Precautions
- Ensure power is disconnected before installation.
- Installation should be performed by a qualified electrician if you are unsure.
- Do not exceed the maximum load ratings of the device.
3.2 Wiring Diagram
The SONOFF 4CH Pro R2 supports both AC and DC power inputs and provides clean contacts (Normally Open/Normally Closed) for each of its four relays. Refer to the specific wiring diagram provided with your product packaging or the official SONOFF website for detailed connection instructions. Ensure correct polarity for DC input.
3.3 DIN Rail Mounting
The device is designed for easy mounting on a standard DIN rail. Securely attach the switch to the rail in your electrical panel or enclosure.
3.4 Initial Pairing (eWeLink App)
- Download the eWeLink app from your smartphone's app store (available for iOS and Android).
- Register an account and log in.
- Power on the SONOFF 4CH Pro R2.
- Press and hold one of the pairing buttons on the device until the Wi-Fi LED indicator flashes rapidly.
- In the eWeLink app, tap the "+" icon to add a device. Follow the on-screen instructions to connect the device to your 2.4GHz Wi-Fi network. Note: The device only supports 2.4GHz Wi-Fi. If your router broadcasts both 2.4GHz and 5GHz with the same SSID, temporarily disable 5GHz or move further away from the router during pairing to ensure your phone connects to 2.4GHz.
- Once successfully paired, you can rename the device and individual channels within the app.
4. Operating Modes
The SONOFF 4CH Pro R2 offers three distinct working modes, configurable via the eWeLink app or onboard DIP switches (for older firmware versions). Ensure your device firmware is updated for app-based configuration.
4.1 Self-Locking Mode
In self-locking mode, each of the four channels operates independently. Turning on one channel will not affect the state of the others. This mode is suitable for controlling individual lights or appliances.
Image: Depiction of self-locking mode, allowing independent control of four connected lights.
4.2 Interlock Mode
Interlock mode ensures that only one channel can be active at any given time. When one channel is turned on, all other channels will automatically turn off. This mode is ideal for applications like controlling garage doors, blinds, or fan speeds where only one state should be active.
Image: Example of interlock mode, where enabling one channel automatically turns off others, suitable for garage doors or blinds.
4.3 Inching Mode
Inching mode allows a channel to turn on for a preset duration (1-16 seconds) and then automatically turn off. This functions as a pulse switch and is useful for momentary actions, such as triggering a gate opener or a momentary light switch.
Image: Inching mode, where the device turns on for a set period and then automatically turns off, useful for timed lighting.
4.4 RF Remote Control
The 4CH Pro R2 includes a 433.92MHz RF receiver, allowing control via a compatible RF remote (sold separately). Follow the remote's instructions for pairing with the switch.
4.5 Voice Control
The device is compatible with Amazon Alexa and Google Home. Link the "eWeLink Smart Home Fan" skill (for Alexa) or "Smart We Link" (for Google Home) in their respective apps to enable voice commands for your connected devices.
Image: Voice control functionality, showing compatibility with Alexa and Google Home for turning lights on/off.
4.6 Timing Schedules
Within the eWeLink app, you can set up to 8 enabled single, repeat, or countdown timers. These timers allow for automatic turning on/off of devices at specified times, and they will continue to function even if the internet connection is temporarily unavailable.
5. Maintenance
- Keep the device clean and free from dust. Use a dry cloth for cleaning.
- Avoid exposing the device to excessive moisture or extreme temperatures.
- Regularly check for firmware updates via the eWeLink app to ensure optimal performance and access to new features.
- Periodically verify wiring connections to ensure they remain secure.
6. Troubleshooting
- Device not connecting to Wi-Fi:
- Ensure your Wi-Fi network is 2.4GHz. The device does not support 5GHz Wi-Fi.
- Verify your Wi-Fi password is correct.
- Move the device closer to your Wi-Fi router.
- Restart your router and try pairing again.
- Ensure your phone is connected to the 2.4GHz network during the pairing process.
- Device offline in eWeLink app:
- Check your internet connection.
- Verify the device has power.
- Restart the device by cycling its power.
- If the issue persists, try re-pairing the device.
- RF Remote not working:
- Ensure the RF remote is compatible with 433.92MHz frequency.
- Follow the remote's instructions for pairing with the SONOFF 4CH Pro R2.
- Check the remote's battery.
- Voice control not responding:
- Ensure the device is online in the eWeLink app.
- Verify that the eWeLink skill/service is correctly linked in your Alexa or Google Home app.
- Try re-discovering devices in your voice assistant app.
7. Specifications
| Feature | Detail |
|---|---|
| Model | 4CHPROR3 |
| Operating Voltage | 90~250V AC / 5~24V DC |
| Max Current | 10A/gang, 16A Total |
| Wireless Standard | IEEE 802.11 b/g/n 2.4GHz |
| RF Frequency | 433.92MHz |
| Operating Mode | Automatic, Self-locking, Interlock, Inching |
| Contact Type | Normally Open (NO) |
| Dimensions (L x W x H) | 5.71 x 3.54 x 1.34 inches (145 x 90 x 34 mm) |
| Weight | 7.84 ounces |
| Manufacturer | Itead Studio |
| International Protection Rating | IP54 |
Image: A comparison table highlighting features across different SONOFF 4CH models, including 4CHPROR3.
8. Support and Warranty
8.1 Customer Support
For further assistance, technical support, or inquiries, please visit the official SONOFF website or refer to the eWeLink app's help section. You can also find additional resources and FAQs on the SONOFF Store on Amazon.
A detailed User Manual in PDF format is also available for download: Download User Manual (PDF).
8.2 Warranty Information
Warranty terms and conditions are typically provided with the product packaging or available on the manufacturer's official website. Please retain your proof of purchase for warranty claims.
