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 small form factor smart switch with potential-free contacts, which allows remote control of electric appliances through a mobile phone, tablet, PC, or home automation system. It can work standalone in a local Wi-Fi network or it can also be operated through cloud home automation services.
The Shelly Plus 1 UL can be accessed, controlled and monitored remotely from any place where the user has internet connectivity, as long as the device is connected to a Wi-Fi router and the Internet.
It can be retrofitted into standard electrical wall boxes, behind power sockets and light switches or other places with limited space.
The Shelly Plus 1 UL has an embedded Web Interface that can be used to monitor and control the device, as well as adjust its settings.
Main Applications
- Residential
- MDU (Multi Dwelling Units – apartments, condominiums, hotels, etc.)
- Light commercial (small office buildings, small retail/restaurant/gas station, 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)and12V
Outputs
- 1 potential-free contacts relay output on screw terminal:
O
Add-on Interface
- Shelly proprietary serial interface
⚠ CAUTION! High voltage 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 factory reset the device.
Outputs
- LED (monocolor) indication
- AP (Access Point) enabled and Wi-Fi disabled: 1 second ON / 1 second OFF
- Wi-Fi enabled, but not connected to a Wi-Fi network: 1 second ON / 3 seconds OFF
- Connected to a Wi-Fi network: Constantly ON
- Cloud is enabled, but not connected: 1 second ON / 5 seconds OFF
- Connected to Shelly Cloud: Constantly ON
- OTA (Over the Air Update): ½ sec ON / ½ sec OFF
- Button pressed and held for 5 seconds: ½ sec ON / ½ sec OFF
- Button pressed and held for 10 seconds: ¼ sec ON / ¼ sec OFF
The list above starts with the initial device status and the lowest priority. Every next state cancels the previous one.
Specifications
| Type | Value |
|---|---|
| Physical | |
| Size (HxWxD) | 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 lbin |
| 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 | |
| - 110–240 VAC, 50/60 Hz - 12 VDC stabilized - 24–48 VDC | |
| 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 and 50 m / 160 ft outdoors (Depends on local conditions) |
| Bluetooth Protocol | 4.2 |
| Bluetooth Range | Up to 10 m / 33 ft indoors and 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 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 and RC snubber |
 |  |
|---|---|
| 24–48 VDC power supply Resistive load | 24–48 VDC power supply Inductive load and RC snubber |
 |  |
|---|---|
| 12 VDC stabilized power supply Resistive load | 12 VDC stabilized power supply Inductive load and RC snubber |
Legend
| Terminals | Description | Wires | Description |
|---|---|---|---|
I | Load circuit input terminal | L | Live (110–240 VAC) wire |
O | Load circuit output terminal | N | Neutral wire |
SW | Switch (controlling O) input terminal | + | 12 / 24–48 VDC positive wire |
+12V | 12 VDC positive terminal | GND | 12 / 24–48 VDC ground wire |
L | Live (110–240 VAC) terminal | ||
N | Neutral terminal | ||
+ | 24–48 VDC positive terminal | ||
Ʇ | 12 / 24–48 VDC ground terminal |
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)
Web Interface Guide
Read the Shelly Plus 1, Plus 1 UL web interface guide