Shelly 2PM Gen4: Dual Smart Relay with Power Monitoring

The Shelly 2PM Gen4 is a smart switch designed with a compact form factor, ideal for installation in standard electrical wall boxes, behind outlets, switches, or other confined spaces. This module acts as a smart switch with the added capability of power consumption measurement, allowing you to remotely monitor the usage of connected appliances.

The fourth generation is powered by an improved processor (ESP-Shelly-C68F) and integrates Wi-Fi, Bluetooth, and Zigbee connectivity. In addition to acting as a BLE bridge and Zigbee range extender, this device natively supports the Matter standard (with a default device profile of a switch).

Featured Use Cases

Home Automation

  • Independent control of two circuits: Ideal for double wall switches (e.g., living room and hallway lights), allowing separate control and power usage monitoring for each channel.
  • Smart control of blinds and awnings: Allows control of motorized blinds or curtains, supporting calibration for precise open/close/stop positioning and slat tilt control for Venetian blinds.
  • Appliance monitoring: Measures the power consumption of two appliances independently, with the ability to receive alerts if power thresholds are exceeded.
  • Bathroom and kitchen ventilation: Use channel 1 for the bathroom fan with humidity-based automation, and channel 2 for an electric towel warmer.

Commercial and Industrial Applications

  • Lighting for zones or offices: Automate lighting in two adjacent rooms and record power consumption separately for energy audits.
  • Dual motor control: Allows control and monitoring of two low-load motors (e.g., fans, valves, pumps).
  • Digital signage control: Use one channel for store sign lighting and the other for a promotional display or kiosk.

Technical Specifications

Feature Details
Power Supply (AC) 110 - 240 V Ì´ 50/60 Hz
Power Supply (DC) 24 V ±10 % / 24 - 30 V⎓
Max. switching current (AC) 10 A (per channel), 16 A (total), 18 A (total peak)
Max. switching current (DC) 10 A
Power Measurement Integrated Voltmeter (AC) and Ammeter (AC)
Wireless Protocols Wi-Fi (802.11 b/g/n/ax), Bluetooth (5.0), Zigbee (802.15.4)
Processor and Memory CPU: ESP-Shelly-C68F | Flash: 8MB
Safety Protections Overheat, overvoltage, overcurrent, and overpower protection