Shelly Pro 3EM Galvanically Isolated Smart Switch Add-On

The Shelly Pro 3EM Add-On is a galvanically isolated switch designed to extend the capabilities of the Shelly Pro 3EM energy monitoring device. This add-on module enables sophisticated control of contactors and other electrical apparatus, allowing for automated management of high-power circuits based on the energy consumption data provided by the main unit. Its design integrates directly with the existing Shelly Pro 3EM, creating a unified system for comprehensive energy management and load control. Installation must be performed by a qualified electrician to mitigate risks of electrocution. The device should only be connected to power grids and appliances that comply with all applicable regulations, and it is crucial to ensure no voltage is present at the device terminals before making any connections. The unit must not be installed in damp locations or connected to loads exceeding its maximum specified capacity.

Technical Specifications

• Input Voltage: 230V AC, 50/60Hz
• Maximum Load Current: 16A (Resistive)
• Switching Type: Galvanically isolated relay
• Connection Type: Direct integration with Shelly Pro 3EM via header connector
• Mounting: DIN rail mounting
• Cable Type: Recommended solid single-core cables
• Terminal Configuration: I (Input), O (Output), and Neutral terminals

Key Features

• Galvanic Isolation: Provides electrical separation between control and load circuits for enhanced safety.
• Seamless Integration: Designed specifically to connect directly to the Shelly Pro 3EM main unit.
• Contactors Control: Enables switching of contactors for managing higher power electrical loads.
• Automated Operation: Allows for automated load control based on energy monitoring data from the Pro 3EM.
• Compact Design: Space-efficient form factor that mounts alongside the main unit on standard DIN rails.

Use Cases

The Shelly Pro 3EM Add-On is ideal for commercial and industrial environments where automated load management is required. It can be used to control lighting circuits, HVAC systems, or industrial machinery based on real-time energy consumption patterns. In renewable energy installations, it enables automatic switching of backup generators or battery systems. The device also finds application in smart building automation for scheduled operation of high-power equipment and demand response scenarios where loads need to be shed during peak usage periods.