Shelly Plus 1 UL
Device Identification
- Device name: Shelly Plus 1 UL
- Device model: SNSW-001X15UL
- Device SSID: ShellyPlus1-XXXXXX
Short Description
The Shelly Plus 1 UL is a UL-certified, compact smart switch featuring potential-free contacts, enabling remote control of electrical appliances via smartphone, tablet, PC, or home automation systems. It operates standalone within a local Wi-Fi network or integrates with cloud-based home automation services.
Users can access, control, and monitor the device remotely from any location with internet connectivity, provided the device is connected to a Wi-Fi router and the Internet.
Designed for retrofit installation, it fits into standard electrical wall boxes, behind power outlets, light switches, or other space-constrained areas.
The device includes an embedded web interface for monitoring, control, and configuration.
Main Applications
- Residential
- MDU (Multi Dwelling Units – apartments, condominiums, hotels, etc.)
- Light Commercial (small offices, retail stores, restaurants, gas stations, etc.)
- Government/Municipal
- University/College
Integrations
Amazon Alexa Supported Capabilities
- Toggle Controller
Google Smart Home Supported Traits
- On/Off
Samsung SmartThings Supported Capabilities
- Switch
Simplified Internal Schematics
Device Electrical Interfaces
Inputs
- 1 switch/button input on screw terminal: SW
- 1 potential-free contacts relay input on screw terminal: I
- 3 power supply inputs on screw terminals: N (+), L (Ʇ), and 12V
Outputs
- 1 potential-free contacts relay output on screw terminal: O
Add-on Interface
- Shelly proprietary serial interface
⚠ CAUTION! High voltage present on the add-on interface when the device is powered.
Connectivity
- Wi-Fi
- Bluetooth
Safety Functions
- Overheating protection
Supported Load Types
- Resistive (incandescent bulbs, heating devices)
- Capacitive (capacitor banks, electronic equipment, motor start capacitors)
- Inductive with RC Snubber (LED light drivers, transformers, fans, refrigerators, air conditioners)
User Interface
Inputs
- One (Reset) button
- Press and hold for 5 seconds to enable Device Access Point and Bluetooth connection.
- Press and hold for 10 seconds to perform a factory reset.
Outputs
- LED (monochromatic) indicator
- AP enabled, Wi-Fi disabled: 1 second ON / 1 second OFF
- Wi-Fi enabled, not connected to a network: 1 second ON / 3 seconds OFF
- Connected to Wi-Fi network: Constantly ON
- Cloud enabled but not connected: 1 second ON / 5 seconds OFF
- Connected to Shelly Cloud: Constantly ON
- OTA (Over-the-Air Update): ½ second ON / ½ second OFF
- Button pressed and held for 5 seconds: ½ second ON / ½ second OFF
- Button pressed and held for 10 seconds: ¼ second ON / ¼ second OFF
Note: The listed states are prioritized from lowest to highest. Each subsequent state overrides the previous one.
Specifications
| Category | Type | Value |
|---|---|---|
| Physical | Size (H×W×D) | 37 × 42 × 16 mm / 1.46 × 1.65 × 0.63 in |
| Weight | 26 g / 0.92 oz | |
| Mounting | Wall console | |
| Screw terminals max torque | 0.4 Nm / 3.5 lbf·in | |
| Conductor cross section | 0.5 to 1.5 mm² / 20 to 14 AWG | |
| Conductor stripped length | 5 to 6 mm / 0.20 to 0.24 in | |
| Shell material | Plastic | |
| Color | Blue | |
| Environmental | Ambient 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 |
|
| Power consumption | < 1.2 W | |
| Output circuits ratings | Max switching voltage (AC) | 240 V (single wire) |
| Max switching voltage (DC) | 30 V | |
| Max switching current (AC) | 15 A | |
| Max switching current (DC) | 10 A | |
| Sensors, meters | Internal temperature sensor | Yes |
| Radio | RF band | 2400 – 2495 MHz |
| Max RF power | < 20 dBm | |
| Wi-Fi protocol | 802.11 b/g/n | |
| Wi-Fi range | Up to 30 m / 100 ft indoors, up to 50 m / 160 ft outdoors (Depends on local conditions) | |
| Bluetooth protocol | 4.2 | |
| Bluetooth range | Up to 10 m / 33 ft indoors, up to 30 m / 100 ft outdoors (Depends on local conditions) | |
| MCU | CPU | ESP32-U4WDH |
| Flash | 4 MB | |
| Firmware capabilities | Schedules | 20 |
| Webhooks (URL actions) | 20 with up to 5 URLs per hook | |
| Scripting | Yes | |
| MQTT | Yes | |
| CoAP | No |
Basic Wiring Diagrams
110–240 VAC power supply
Resistive load
110–240 VAC power supply
Inductive load with RC snubber
24–48 VDC power supply
Resistive load
24–48 VDC power supply
Inductive load with RC snubber
12 VDC stabilized power supply
Resistive load
12 VDC stabilized power supply
Inductive load with RC snubber
Legend
Terminals
- I: Load circuit input terminal
- O: Load circuit output terminal
- L: Live (110–240 VAC) terminal
- N: Neutral terminal
- SW: Switch (controlling O) input terminal
- +: 24–48 VDC positive terminal
- +12V: 12 VDC positive terminal
- GND: 12/24–48 VDC ground terminal
- Ʇ: 12/24–48 VDC ground terminal
Wires
- L: Live (110–240 VAC) wire
- N: Neutral wire
- +: 12/24–48 VDC positive wire
- GND: 12/24–48 VDC ground wire
Web Interface Guide
Read the Shelly Plus 1, Plus 1 UL web interface guide