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SHELLY - 2-channel Wi-Fi DIN rail dimmer module with energy measurement Shelly Pro Dimmer 2PM




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Professional 2-channel DIN rail smart dimmer with power monitoring.

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Shelly Pro Dimmer 2PM is a DIN-rail mountable, two-channel smart dimmer with power monitoring. Use it to control, dim, and power measure a wide range of halogen lights, dimmable LED, and ferromagnetic transformers between 110-240V. Different types of actions, scenarios, and schedules can be set to sync your lighting environment to your daily activities or business needs. 

Shelly Pro series 

Enhanced with temperature, overpower, and overvoltage load protection, Shelly Pro series is designed to be installed inside the breaker box (DIN). Allowing full smart automation with no additional cables or wiring, Shelly Pro line is perfect for homes, offices, stores, business, and manufacturing facilities, as well as new buildings.

LAN, Wi-Fi, and Bluetooth connectivity

LAN connection for high security and reliability. Simultaneous Wi-Fi and LAN usage, as back up when needed. 

Light intensity adjustment 

Use the dimming function to set the brightness of your lights to your preference.  

Power Monitoring

Shelly Pro Dimmer 2PM provides precise monitoring of power consumption. 

Flexible input control

Use it with your existing switches, no matter if they're single or dual button.

Enhanced safety & security

Improved safety features and TLS 1.2 support, allowing a broad range of secure cloud-connected and local integrations, 

Smart scenes

Set custom scenes by combining Shelly Pro Dimmer 2PM with your other Shelly devices


  • LAN, Wi-Fi, and Bluetooth connection
  • Power metering and free storage data
  • Night mode for lower brightness during night hours
  • Automatic calibration of dimming type and load
  • Multiple dimming types for different types of bulbs- leading & trailing edge
  • Switch/button input mode
  • Use with your existing switches (one/dual button control)
  • Adjustable min/max brightness
  • Adjustable button fade rate and transition time  
  • No hub required! Easy control through the Shelly Smart Control app, most platforms and protocols, as well as voice assistants. Use it with Alexa, Home Assistant, or your preferred automation platform
  • Wi-Fi Range Extender & BLE Gateway
  • Extremely fast processor for immediate reaction - ESP32
  • Supports scripting, webhooks, MQTT, WebSocket, HTTPS, UDP, TLS and custom certificates


  • HV LED lamps (Dimmable): 200 W
  • Dimmable electronic transformers: 180 W
  • HV LED lamps (Non Dimmable): 110 W (On/Off mode)
  • Incandescent Light bulbs: 200 W
  • HV halogen lamp: 200 W
  • Wound transformer: 200 VA
  • CFL: 50 W
  • Dimensions (LxWxH): 94x19x69 mm
  • Weight: 75 g 
  • Ambient temperature: -20 °C to 40 °C
  • Humidity: 30 % to 70 % RH
  • Max. altitude: 2000 m 
  • Screw terminals max torque: 0.4 Nm
  • Conductor cross section: 0,5 to 2,5 mm2 / 20 to 14 AWG (green connectors) 0,5 to 1,5 mm2 / 20 to 16 AWG (blue connector) (solid, strand-ed, and bootlace ferrules)
  • Conductor stripped length: 6 to 7 mm (green connectors) 5 to 6 mm (blue connector)
  • Power supply: 110-240 V~ 50/60 Hz
  • Power consumption: < 2 W
  • External protection: max. 10 A, tripping characteristic B or C,
  • Max. output power: 200 W per channel
  • Dimming type: Trailing edge
  • Supported loads: Incandescent, dimmable LED and CFL
  • RF band: 2400 - 2495 MHz
  • Max. RF power: < 20 dBm
  • Wi-Fi protocol: 802.11 b/g/n
  • Wi-Fi operational range (depending on local conditions): up to 50 m outdoors up to 30 m indoors
  • Bluetooth protocol: 4.2
  • Bluetooth operational range (depending on local conditions): up to 30 m outdoors up to 10 m indoors
  • CPU: ESP32-D0WDQ6
  • Flash: 8 MB
  • Schedules: 20
  • Webhooks (URL actions): 20 with 5 URLs per hook
  • Scripting: Yes
  • MQTT: Yes