Sonoff 4CH Pro User manual
Sonoff 4CH Pro (R2) User Guide
Hi, welcome to use Sonoff 4CH Pro! Sonoff 4CH Pro is a 4 channel din rail
mounting 433MHz RF remote WiFi switch that can independently control
the 4 home appliances. It supports switching among 3 working modes:
inching/interlock/self-locking mode.
Power supply: 90-250v AC(50/60Hz)/5-24v DC. Max current: 10A/gang.
1. Download “eWeLink” app.
Search “eWeLink” in APP Store for iOS version or Google play for Android
version.
2. Wiring instruction
If you want to connect the Sonoff 4CH Pro with lights or appliances. Please
strictly follow the wiring diagram as shown below:
You may choose to power up by 5-24V DC or by 90-250V AC. Each relay
without voltage output.
R1-R4 work as local control switches, you can directly press it to turn
on/off the corresponding gang. They also work as pairing button.
If you connect the Sonoff 4CH Pro with a motor, the wiring instruction is
as below:
Working Mode Settings
RF Remote Settings
3. Add Device
1. Power up your device through 90-250v AC(50/60Hz) or 5-24v DC.
2. Press and hold one of the 4 switch buttons for 7 seconds until the
wifi LED fast blinks 3 times and repeats.
3. Click the “+” icon on eWeLink to search device, select the corresponding
pairing icon, click next.
The App will auto-search the device.
4. Enter your home SSID & password:
4.1 If your WiFi doesn’t have a password, keep it blank.
4.2 Now eWeLink only support 2.4G wifi communication protocol, 5G-
WiFi-router is not supported
5. Next, the device will be registered by eWelink and add it to your account
，it takes 1-3 minutes.
6. Name the device to complete.
7. Maybe the device is “Offline” on eWeLink, for the device needs 1 minute
to connect to your router and server. When the wifi LED is on, the device
is “Online”.
3. Working Mode Settings
You can set the switch among 3 working modes: inching/interlock/self-
locking mode.
1. In self-locking mode, you can turn on/off the 4 connected devices
independently. For example, if you turn on CH1, connected device keeps
on. If you turn off CH2, connected device keeps off.
2. In inching mode, you can turn on the connected devices for 1-16s . For
example, you can turn on CH1 connected device for 1s, then auto-off.
3. In interlock mode, you can turn on 1 device every time, and turn off
other devices at the same time. For example, if you have turned on CH2,
then when you turn on CH3, CH2 will be auto-turned off at the same time.
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