Shelly Plus 2PM UL

Device identification

Name: Shelly Plus 2PM UL

Model: SNSW-002P15UL

Device SSID: ShellyPlus2PM-XXXXXX

Short description

Shelly Plus 2PM UL is a UL-certified, compact two-channel smart switch with power measurement and cover control
functionality. It enables remote control and automation of electrical appliances through Wi-Fi or cloud-based systems.
Designed for easy installation in standard electrical wall boxes or behind sockets and switches, it offers
reliable power monitoring, safety features, and flexible integration options.
The embedded web interface allows direct configuration, control, and real-time monitoring of connected loads.

Main applications

• Residential
• MDU (apartments, condominiums, hotels)
• Light commercial (offices, retail, restaurants, gas stations)
• Government / municipal buildings
• University / college facilities

Integrations

• Amazon Alexa: Supported
• Google Smart Home: Supported
• Samsung SmartThings: Supported

Simplified internal schematics

Plus-2PM-UL-internal-schematics.png

Device electrical interfaces

Inputs:

2 switch/button inputs on screw terminals: S1 and S2

3 power supply inputs on screw terminals: 1 N (+) and 2 L (Ʇ)

Outputs:

2 relay outputs with power measurement on screw terminals

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 features

Overheating protection

Overvoltage protection

Overcurrent protection

Overpower protection

Obstacle detection (cover mode)

Safety switch (cover mode)

Supported load types

• Resistive (incandescent bulbs, heating devices)
• Capacitive (capacitor banks, electronic equipment, motor start capacitors)
• Inductive with RC Snubber (LED drivers, transformers, fans, refrigerators, air conditioners)

User interface

Inputs:

One (Reset) button

• Hold 5 seconds → Enable access point and Bluetooth connection

• Hold 10 seconds → Factory reset

Outputs:

LED (monocolor) indication

• AP enabled, Wi-Fi disabled → 1s ON / 1s OFF

• Wi-Fi enabled, not connected → 1s ON / 3s OFF

• Connected to Wi-Fi → Constantly ON

• Cloud enabled, not connected → 1s ON / 5s OFF

• Connected to Shelly Cloud → Constantly ON

• OTA update → ½s ON / ½s OFF

• Button held 5s → ½s ON / ½s OFF

• Button held 10s → ¼s ON / ¼s OFF

The LED indication list begins with the lowest priority state. Each subsequent condition overrides the previous one.

Physical

Size (HxWxD): 42×37×12 ±0.5 mm / 1.65×1.46×0.66 ±0.02 in

Weight: 17 g / 0.60 oz

Screw terminals torque: 0.2 Nm (1.8 lbf·in)

Conductor size: 0.1–1 mm² (30–16 AWG, solid, stranded, and bootlace ferrules)

Strip length: 6 mm (0.24 in)

Mounting: In-wall

Shell material: Plastic

Shell color: Yellow

Connectors color: Green

Environmental

Ambient temperature: −20 °C to 40 °C (−5 °F to 105 °F)

Humidity: 30–70% RH

Electrical

Power supply: 12/24 V⎓

Power consumption: < 1.2 W

Output ratings

Max control voltage: 24 V⎓

Max control current: 4 A per channel (10 A total)

PWM frequency: 833 Hz

Sensors & Meters

Voltmeter: 0–24 V

Voltmeter accuracy: ±5%

Ammeter: 0–10 A

Ammeter accuracy: ±10%

Power and energy meters: Power measurement

No load threshold: 0.5 VA per channel

Internal temperature sensor: Yes

Radio

Wi-Fi protocol: 802.11 b/g/n

RF band: 2401–2495 MHz

Max RF power: < 20 dBm

Range: Up to 30 m / 100 ft indoors; 50 m / 160 ft outdoors (depends on conditions)

Bluetooth protocol: 4.2

Bluetooth RF band: 2400–2483.5 MHz

Bluetooth max RF power: < 4 dBm

Bluetooth range: Up to 10 m / 33 ft indoors; 30 m / 100 ft outdoors (depends on conditions)

MCU

CPU: ESP-Shelly C38F

Clock frequency: 160 MHz

RAM: 400 KB

Flash: 4 MB

Firmware capabilities

Schedules: 20

Webhooks: 20 (up to 5 URLs each)

Scripting: Yes

MQTT: Yes