Shelly 2L Gen3: User and Safety Guide

Safety Information

⚠ WARNING! Risk of electric shock. Installation must be performed carefully by a qualified electrician.

⚠ WARNING! Before making any changes to connections, ensure no voltage is present at the device terminals.

☑ CAUTION! Connect the device only as shown in these instructions. Other methods may cause damage or injury.

☑ CAUTION! Connect only to power grids and appliances compliant with all applicable regulations. Short circuits can cause fire, property damage, and electric shock.

☑ CAUTION! The device and connected appliances must be secured by a cable protection switch compliant with EN60898-1 (type B or C, max. 16 A rated current, min. 6 kA interrupting rating, energy limiting class 3).

⚠ WARNING! Turn off circuit breakers before installation. Use a suitable test device to confirm no voltage on wires. Proceed with installation only when voltage-free.

☑ CAUTION! Do not use the device if it shows signs of damage or defect.

☑ CAUTION! The device may only be connected to and control electric circuits and appliances compliant with applicable standards and safety norms.

☑ CAUTION! The device is intended for indoor use only.

☑ CAUTION! Keep the device away from dirt and moisture.

ℹ Important Note: For the first channel load, a Shelly Bypass is required, except for incandescent lights.

Product Description

The Shelly 2L Gen3 is a compact, dual-channel smart switch designed for lighting control without requiring a neutral wire. It enables effortless control of resistive, inductive, and capacitive loads via mobile phone, tablet, PC, or integrated home automation systems. It is suitable for managing lighting, electric heaters, transformers, fans, and generators. The device can operate standalone on a local Wi-Fi network or integrate with cloud home automation services, allowing remote access and control. Its compact design fits standard electrical wall boxes and behind light switches. The embedded Web Interface allows for easy configuration. This device is Matter-ready, with Matter functionality available via a future firmware update.

Wiring Diagram

The wiring diagram illustrates the Shelly 2L Gen3 device with the following terminals:

• O2: Load circuit output terminal 2
• S2: Switch input terminal 2
• L: Live (220-240 V~) terminal
• O1: Load circuit output terminal 1
• S1: Switch input terminal 1
• Sx: Switch signal output terminal

Connections involve wiring the Live (L) wire to the L terminal, connecting loads to O1 and O2, connecting switches/buttons to S1/Sx and S2/Sx respectively, and connecting the Neutral (N) wire. A Shelly Bypass must be connected in parallel to the load at O1 (mandatory, except for incandescent lights).

Installation Instructions

1. Connect the first load (up to 1.2 A) to the O1 terminal of the Device and the Neutral wire as shown in the wiring diagram.
2. Connect the Shelly Bypass, provided in the package, in parallel to the first load (mandatory, except for incandescent lights).
3. Connect the second load to the O2 terminal and the Neutral wire.
4. Connect the first switch or button to the S1 and Sx terminals.
5. Connect the second switch or button to the S2 and Sx terminals.
6. Connect the Live wire to the L terminal.

ℹ Note: Use solid single-core wires or stranded wires with ferrules. Wire insulation should have increased heat resistance (not less than PVC T105°C / 221°F). Do not connect multiple wires to a single terminal.

Specifications

• Size (HxWxD): 37x42x16 ±0.5 mm / 1.46x1.65x0.63 ±0.02 in
• Weight: 28 g / 1 oz
• Screw terminals max torque: 0.4 Nm / 3.5 lbin
• Conductor cross section: 0.2 to 2.5 mm² / 24 to 14 AWG (solid, stranded, and bootlace ferrules)
• Conductor stripped length: 6 to 7 mm / 0.24 to 0.28 in
• Mounting: In-wall
• Shell material: Plastic
• Shell color: Cyan
• Ambient working temperature: -20°C to 40°C / -5°F to 105°F
• Storage temperature: 10°C to 40°C
• Humidity: 30% to 70% RH
• Max. altitude: 2000 m / 6562 ft
• Power supply: 220-240 V~ 50 Hz (Shelly Bypass required for load at O1)
• Shelly Bypass included: Yes
• Power consumption: < 1.2 W
• Neutral not needed: Yes (Shelly Bypass required for load at O1)
• Min. load without neutral and without Bypass: Bypass is required for the load at O1, except for incandescent lights.
• Max. switching voltage: 240 V~
• Max. switching power: 200 W through O1, 700 W through O2
• Internal-temperature sensor: Yes
• Wi-Fi Protocol: 802.11 b/g/n
• Wi-Fi RF band: 2401 - 2495 MHz
• Wi-Fi Max. RF power: < 20 dBm
• Wi-Fi Range: Up to 30 m / 98 ft indoors and 50 m / 164 ft outdoors (depends on local 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 and 30 m / 98 ft outdoors (depends on local conditions)
• CPU: ESP-Shelly-C38F
• Clock frequency: 160 MHz
• RAM: 512 KB
• Flash: 8 MB
• Schedules: 20
• Webhooks (URL actions): 20 with 5 URLs per hook
• Scripting: Yes
• MQTT: Yes

Shelly Cloud Inclusion

The device can be monitored, controlled, and set up via the Shelly Cloud home automation service. Access is available through Android, iOS, or Harmony OS mobile applications, or via any internet browser at https://control.shelly.cloud/. For detailed instructions on connecting and controlling the device with the Shelly app, refer to the application guide at https://shelly.link/app-guide.

Troubleshooting

For installation or operation issues, consult the knowledge base page: https://shelly.link/2L_Gen3

Declaration of Conformity

Shelly Europe Ltd. declares that the radio equipment type Shelly 2L Gen3 complies with Directive 2014/53/EU, 2014/35/EU, 2014/30/EU, 2011/65/EU. The full text of the EU declaration of conformity is available at: https://shelly.link/2L_Gen3_DoC

Manufacturer: Shelly Europe Ltd.

Address: 51 Cherni Vrah Blvd., bldg. 3, . 2-3, 1407 Sofia, Bulgaria

Tel: +359 2 988 7435

E-mail: support@shelly.cloud

Official website: https://www.shelly.com

Contact information changes are published on the official website. All rights to the Shelly® trademark and other intellectual rights associated with this device belong to Shelly Europe Ltd.