Description Sonoff SPM-4Relay Smart 4-Channel Relay Module (Requires SPM-Main)
The Sonoff SPM-4Relay is a 4-channel smart relay module designed to work in conjunction with the Sonoff SPM-Main module, forming part of Sonoff's stackable smart power meter system. This setup is ideal for applications requiring precise power monitoring and control across multiple circuits, such as in commercial buildings, server rooms, and industrial installations.
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🔧 Key Specifications
Model: SPM-4Relay
Power Supply: 100-240V AC, 50/60Hz
Max Load: 20A per channel; 80A total across all channels
Communication Interface: RS-485 (connects to SPM-Main)
Dimensions: 250 x 90 x 66.5 mm
Installation: DIN rail compatible
Operating Temperature: -10°C to +40°C
Enclosure Material: Flame-retardant V0 PC
⚙️ Features
Four Independent Channels: Each capable of handling up to 20A, allowing for control of high-power appliances.
Real-time Power Monitoring: Track voltage, current, and power consumption for each channel via the eWeLink app.
Overload Protection: Automatically cuts power to prevent damage when set limits are exceeded.
Remote Control: Manage and monitor connected devices remotely through the eWeLink app.
Stackable Design: Connect up to 32 SPM-4Relay modules to a single SPM-Main, enabling control of up to 128 channels.
Secure Communication: Utilizes RS-485 for stable and long-distance data transmission between modules.
🛠️ Installation and Setup
◆ Power Off: Ensure the main power supply is turned off before installation.
◆ Mounting: Mount the SPM-4Relay module onto a DIN rail within your electrical cabinet.
◆ Wiring: Connect the module to the SPM-Main using RS-485 communication cables.
◆ Power On: Restore power and use the eWeLink app to pair and configure the module.
Note: The SPM-4Relay requires an SPM-Main unit for operation, which is sold separately.
📦 Box Contents
One Sonoff SPM-4Relay module
User manual
