Shelly Dimmer 2 WiFi Operated Smart Relay

The Shelly Dimmer 2 represents a sophisticated advancement in intelligent lighting control, offering seamless dimming functionality for both leading-edge and trailing-edge dimmable LED lamps, halogen lamps, and low-voltage halogen transformers. This compact device installs discreetly behind existing light switches, maintaining your room's aesthetic while adding comprehensive smart control capabilities. Engineered for reliability and performance, it provides smooth, flicker-free dimming across a wide load range, making it suitable for various residential and commercial lighting applications.

Integration is straightforward through multiple methods including local WiFi connectivity, cloud-based management via the Shelly mobile application, or direct web interface access. The device supports real-time monitoring of energy consumption, allowing users to track power usage and optimise lighting efficiency. With robust construction and compliance with international safety standards, the Shelly Dimmer 2 ensures long-term reliability and safe operation in diverse electrical environments.

Technical Specifications

• Input Voltage: 110-240V AC, 50/60Hz
• Maximum Load Capacity: 150W for LED lamps, 250W for incandescent/halogen
• Dimming Types: Leading-edge and trailing-edge phase control
• Wireless Connectivity: WiFi 802.11 b/g/n 2.4GHz
• Operating Temperature: -20°C to +60°C
• Protection Rating: IP20 for dry indoor environments
• Dimensions: 42mm x 37mm x 19mm
• Compatibility: Works with dimmable LED, halogen, and low-voltage lighting systems

Key Features

• Dual Dimming Technology: Supports both leading-edge and trailing-edge dimming methods for broad compatibility with modern and traditional lighting systems
• No Neutral Requirement: Can operate in circuits without neutral wire when used with minimal load or Shelly Bypass accessory
• Multiple Control Options: Local switch control, smartphone application, voice commands, and scheduled automation
• Energy Monitoring: Real-time power consumption tracking with historical data analysis
• Over-temperature Protection: Automatic power reduction when operating temperatures exceed safe limits
• Voice Control Integration: Native compatibility with Amazon Alexa and Google Assistant for hands-free operation
• Scene Configuration: Create custom lighting scenes based on time, temperature, or other environmental parameters

Installation and Setup

Before installation, ensure the mains power is disconnected at the circuit breaker. The device offers flexible wiring configurations to accommodate different electrical setups. For standard installations with neutral connection, follow diagram 1. In scenarios without neutral wire, utilise diagram 2 with minimum 10W load requirement, or diagram 4 when using the Shelly Bypass accessory without minimum consumption limitations. For installations where switches are also connected to neutral, refer to diagram 3 for proper wiring configuration.

Use Cases

The Shelly Dimmer 2 excels in residential settings for creating ambient lighting in living rooms, bedrooms, and dining areas where mood lighting enhances comfort and atmosphere. In commercial environments, it provides precise lighting control for retail displays, restaurant lighting, and office spaces where both energy efficiency and lighting quality are paramount. The device's scheduling capabilities make it ideal for security lighting applications, automatically adjusting illumination to simulate occupancy during absence periods. For hospitality venues, the dimming functionality allows staff to create appropriate lighting scenes for different times of day and functions while maintaining energy efficiency.

Initial setup involves connecting the device to power following the appropriate wiring diagram. The unit creates its own WiFi access point for configuration, identifiable by an SSID beginning with "shellydimmer2". If the network isn't visible, verify the wiring configuration and reset the device by power cycling followed by pressing any connected switch five times within 60 seconds of power restoration.