---
title: Shelly Pro Dimmer 2PM Professional
date: 2025-10-13T05:35:30Z
modified: 2026-05-18T12:02:35Z
permalink: "https://tech.co.za/product/shelly-pro-dimmer-2pm-professional/"
type: product
status: publish
excerpt: "Professional 2-channel DIN rail smart dimmer with power monitoring\\n\\n\\n\\n\\n\\n 	\\nLAN, Wi-Fi, and Bluetooth connection\\n 	\\nPower metering\\n 	\\nFree storage data (using Shelly App)\\n 	\\nNight mode for lower brightness during night hours\\n 	\\nAutomatic dimming calibration\\n 	\\nSwitch/button input mode\\n 	\\nUse with your existing switches (one/dual button control)\\n 	\\nAdjustable min/max brightness\\n 	\\nAdjustable button fade rate and transition time\\n 	\\nNo 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\\n 	\\nWi-Fi Range Extender & BLE Gateway\\n 	\\nExtremely fast processor for immediate reaction – ESP32\\n 	\\nSupports scripting, webhooks, MQTT, WebSocket, HTTPS, UDP, TLS and custom certificates\\n 	\\nSupports KNXnet / IP communication"
wpid: 554668
product_brand:
  - Shelly
product_type:
  - simple
product_visibility:
  - featured
product_cat:
  - Smart Home
featured_image: "https://tech.co.za/wp-content/uploads/2025/10/SHELLY-PRO-DIMMER-2PMa.png"
---

### Diagrams

![](https://shellysa.co.za/wp-content/uploads/2025/08/shelly-pro-dimmer-2pm_wiring_01.png)

| **Terminals** | **Wires** |  |  |
| --- | --- | --- | --- |
| **SW1**, **SW2** | Switch/button input terminals controlling O1 | **L** | Live (110-240 V) wire |
| **SW3**, **SW4** | Switch/button input terminals controlling O2 | **N** | Neutral wire |
| **O1**, **O2** | Load circuit output terminals |  |  |
| **L** | Live (110-240 V) terminals |  |  |
| **N** | Neutral terminal |  |  |
| **LAN** | Local Area Network RJ 45 connector |  |  |

### Specifications



| **Physical** |  |
| --- | --- |
| Size (HxWxD): | 94x19x69 mm / 3.70×0.75×2.71 in |
| Weight: | 75 g / 2.7 oz |
| Screw terminals max torque: | 0.4 Nm / 3.54 lbin |
| 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, stranded, and bootlace ferrules) |
| Conductor stripped length: | 6 to 7 mm / 0.24 to 0.28 in (green connectors) 5 to 6 mm / 0.20 to 0.24 in (blue connector) |
| Mounting: | DIN rail |
| Shell material: | Plastic |
| Shell color: | Lime |
| **Environmental** |  |
| Ambient working temperature: | -20 °C to 40 °C / -5 °F to 105 °F |
| Humidity: | 30 % to 70 % RH |
| Max. altitude: | 2000 m / 6562 ft |
| **Electrical** |  |
| Power supply: | 110 – 240 V~ 50/60 Hz |
| Power consumption: | < 2 W |
| External protection: | 10 A, tripping characteristic B or C, 6 kA interrupting rating, Energy limiting class 3 |
| Dimming type: | Trailing edge |
| **Output circuits ratings** |  |
| Max. output power: | 200 W per channel |
| **Sensors, meters** |  |
| Voltmeter (AC): | Yes |
| Ammeter (AC): | Yes |
| Power and energy meters: | Yes |
| Internal-temperature sensor: | Yes |
| **Radio** |  |
| **Wi-Fi** |  |
| Protocol: | 802.11 b/g/n |
| RF band: | 2401 – 2483 МHz |
| Max. RF power: | < 20 dBm |
| Range: | Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors (Depends on local conditions) |
| **Bluetooth** |  |
| Protocol: | 4.2 |
| RF band: | 2400 – 2483.5 MHz |
| Max. RF power: | < 4 dBm |
| Range: | Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors (Depends on local conditions) |
| **Microcontroller unit** |  |
| CPU: | ESP32-D0WDQ6 |
| Flash: | 8 MB |
| **Firmware capabilities** |  |
| Schedules: | 20 |
| Webhooks (URL actions): | 20 with 5 URLs per hook |
| Scripting: | Yes |
| MQTT: | Yes |