Shelly Pro Dimmer 2PM -- 2-Channel DIN Rail Smart Dimmer with Power Metering (WiFi + LAN + Bluetooth)

Professional dimming from the DB board. The Shelly Pro Dimmer 2PM is a DIN rail mountable, 2-channel smart dimmer with built-in power metering. Dim two independent lighting circuits up to 200W per channel using trailing-edge technology for smooth, flicker-free control of dimmable LEDs, halogen bulbs, incandescent lamps, and dimmable electronic transformers (110-240V). Automatic dimming calibration ensures smooth performance across the full range. Night mode, adjustable min/max brightness, and configurable fade rates give you precise control. Connect your existing wall switches -- supports single-button, dual-button, and push-button configurations. WiFi + Ethernet + Bluetooth. No hub or subscription required. Made in Bulgaria.

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2 x 200W

Dual Channel Dimming

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Power Metering

Per-Channel

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Night Mode

Reduced Brightness

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WiFi + LAN + BT

No Hub Required

Key Features

2-Channel Dimming, 200W Per Channel -- dim two independent lighting circuits from a single DIN rail module; trailing-edge dimming for smooth, silent operation
Automatic Dimming Calibration -- the device automatically calibrates to your specific bulbs for smooth dimming across the full range; eliminates flicker and dead zones
Per-Channel Power Metering -- real-time voltage, current, power, and energy monitoring for each dimming channel independently
Supported Load Types -- incandescent, dimmable LED, dimmable CFL, dimmable electronic transformers, and iron-core transformers with low-voltage incandescent lamps
Night Mode -- set a specific lower brightness level during night hours; lights automatically dim to the night level within the scheduled window
Adjustable Min/Max Brightness -- reframe the dimming range to match your bulbs; prevents flickering at low levels and avoids wasted range at the top
Adjustable Fade Rate and Transition Time -- control how quickly lights dim up and down; from instant switching to slow cinematic fades
4 Switch/Button Inputs -- connect existing wall switches (SW1-SW4); supports single-button, dual-button, toggle, and momentary push-button configurations
One/Dual Button Dimming -- use one button for on/off and dim, or two buttons (up/down) for more intuitive control with any existing wall switch
Triple Connectivity -- WiFi 802.11 b/g/n, Ethernet RJ45, and Bluetooth 4.2
DIN Rail Mounting -- standard DIN rail form factor (94 x 19 x 69 mm); fits inside any residential or commercial distribution board
Home Assistant Native -- auto-discovered; each channel appears as a dimmable light entity with brightness slider and energy sensor
Voice Control -- "Alexa, dim the living room to 30%" works out of the box
Smart Scheduling -- up to 20 schedules including sunrise/sunset-based automation
Scripting (mJS) -- custom on-device automation scripts
MQTT, HTTP, WebSocket -- full API access for advanced integrations
No Hub or Subscription Required

Important: Maximum 200W per channel (at 220V AC). Not suitable for non-dimmable LEDs, fluorescent tubes, or motor loads. Always use bulbs marked as dimmable. The external circuit breaker protecting the dimmer must be rated at maximum 10A with tripping characteristic B or C.

Perfect For

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Living Room Ambience

Dim two zones independently -- main ceiling lights on channel 1, accent or wall lights on channel 2. Set a night mode for evening movie lighting. Fade rate creates smooth transitions.

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Bedroom Lighting

Gentle wake-up with sunrise-scheduled brightness ramp. Night mode dims to minimal level for nighttime navigation. Dual-button control from bedside switches.

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Hotel and Hospitality

Centralised DIN rail dimming for multiple rooms. KNX and MQTT integration with property management. Night mode for energy savings during unoccupied hours.

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Office and Conference Rooms

Schedule lights to dim after hours. Adjust brightness for presentations vs working. Per-channel metering tracks lighting energy costs by zone.

Dimming tip: After installation, run the automatic calibration by holding the button or triggering it from the Shelly app. The device tests your specific bulbs and maps the optimal dimming curve. This eliminates flicker, dead zones, and uneven brightness steps -- especially important with dimmable LEDs from different manufacturers.

Technical Specifications

Product	Shelly Pro Dimmer 2PM
Model	SPDM-002PE01EU
Type	2-Channel DIN Rail Smart Dimmer with Power Metering
Channels	2 (independent)
Max Output Power	200W per channel (at 220V AC)
Max Current	0.9A per channel
Dimming Type	Trailing edge
Supported Loads	Incandescent, dimmable LED, dimmable CFL, dimmable electronic transformers, iron-core transformers with LV incandescent
Power Supply	110-240V AC, 50/60 Hz
Power Consumption	Less than 2W
External Protection	Max 10A, tripping B or C, 6kA, energy limiting class 3
Metering	Voltage, current, power, accumulated energy (kWh) per channel
Switch Inputs	4 (SW1-SW4) -- switch, push-button, single or dual button
Outputs	2 (O1, O2)
WiFi	802.11 b/g/n (2.4 GHz)
Ethernet	RJ45 (LAN)
Bluetooth	4.2
CPU / Flash	ESP32-D0WDQ6 / 8 MB
Schedules	20
Scripting	mJS (on-device)
Protocols	MQTT, HTTP, WebSocket, Webhooks, TLS
Mounting	DIN rail
Dimensions (H x W x D)	94 x 19 x 69 mm
Weight	75 g
Colour	Lime
Shell Material	Plastic
Operating Temperature	-20 to 40 degrees C
Humidity	30-70% RH
Works With	Home Assistant, Alexa, Google Home, Samsung SmartThings
Hub Required	No
Made In	Bulgaria

What is in the Box

1 x Shelly Pro Dimmer 2PM
1 x Installation Guide

Frequently Asked Questions

Will it work with my dimmable LED bulbs?

Yes -- as long as the bulbs are marked as dimmable. After installation, run the automatic calibration to map the optimal dimming curve for your specific bulbs. Non-dimmable LEDs are not supported and may flicker or fail.

Can I use my existing wall switches?

Yes. The Pro Dimmer 2PM has 4 switch inputs (SW1-SW4) that work with toggle switches, push buttons, and momentary switches. Single-button mode (press for on/off, hold for dim) or dual-button mode (one button dims up, the other dims down) are both supported.

What is night mode?

Night mode lets you set a specific lower brightness level during scheduled hours. When activated, the lights automatically dim to the night level. Useful for hallway and bathroom lights that should be dim at night but full brightness during the day.

Can I dim two rooms independently?

Yes. The two channels are fully independent. Each has its own brightness level, schedule, night mode setting, and min/max brightness configuration. Connect each channel to a different lighting circuit.

What is trailing-edge dimming?

Trailing-edge dimming cuts the power at the end of each AC cycle rather than the beginning. It produces smoother, quieter dimming and is the preferred method for dimmable LED and electronic transformer loads. It avoids the buzzing noise associated with older leading-edge dimmers.

Does it work with Home Assistant?

Yes. Auto-discovered via the Shelly integration. Each channel appears as a dimmable light entity with a brightness slider in Lovelace. Energy sensors are also exposed for the HA Energy Dashboard.