Shelly Plus Add-on

The Shelly Plus Add-on is a galvanically isolated sensor interface for all Shelly Plus, Gen3 and Gen4 relays.

Use it to measure temperature and humidity using its 1-Wire terminals, or connect various analog and digital sensors for complex automation and higher efficiency.

Compatible with the following Gen3 and Gen4 devices in the store:

• Shelly 1 or Shelly 1PM Gen3
• Shelly 2PM Gen3
• Shelly i4 Gen3
• Shelly DALI Dimmer Gen3
• Shelly Dimmer 0/1-10V PM Gen3
• Shelly EM Gen3
• Shelly 1 Gen4
• Shelly 1PM Gen4

⚠️Caution – Read Before Buying⚠️

• Before beginning the installation, please read this guide and any other documents accompanying the device carefully and completely
• Danger of electrocution. The mounting/installation of the device should be performed by a qualified person (electrician)
• Failure to follow the installation procedures could lead to malfunction, danger to your health and life, violation of the law or refusal of legal and/or commercial guarantee (if any)
• Allterco Robotics (makers of Shelly products) and Mann Enterprises LTD are not responsible for any loss or damage in case of incorrect installation or improper operation of this device due to failure to follow the user and safety instructions in the printed guide accompanying this product (also available in the resources section below)
• Do not connect the device to appliances exceeding the given max load.
• Use the device only with a power grid and appliances which comply with all applicable regulations. Short circuit in the power grid or any appliance connected to the device may damage the device.
• Before starting, wire check that the breakers are turned off and there is no voltage on their terminals. This can be done with a phase meter or multimeter. When you are sure that there is no voltage, you can start wiring the cables.

Features

• Compatible with Shelly Plus, Gen3 and Gen4 devices
• Can be used with up to five DS18B20 sensors or one DHT22 sensor
• Has an analog and a digital input

Specifications

Physical
Size (HxWxD)	37x42x15 ±0.5 mm
Weight	105g
Shell material	Plastic
Screw terminals max torque	0.1 Nm
Conductor cross section	max. 1 mm² / 17 AWG
Conductor stripped length	4.5 mm
Color	Black
Environmental
Ambient temperature	-20 °C to 40 °C
Humidity	30 % to 70 % RH
Max. altitude	2000 m / 6562 ft
Electrical
Power supply voltage AC	N/A
Power supply voltage DC	3.3 V (from Shelly Plus device)
Power consumption	< 0.5 W (without sensors)
Output circuits ratings
VCC max. current	10 mA
VREF OUT max. current	1 mA
VREF+R1 OUT resistor	10 kΩ
Shelly Plus device firmware capabilities
Shelly Plus Add-on supporting devices	Shelly Plus devices: Shelly Plus 1/1PM Shelly Plus 1/1PM UL Shelly Plus 2PM Shelly Plus 2PM UL Shelly Plus i4/i4DC Shelly Plus 0-10V Dimmer PM Shelly Plus RGBW PM Shelly Gen3 devices: Shelly 1/1PM Gen3 Shelly 2PM Gen3 Shelly i4 Gen3 Shelly DALI Dimmer Gen3 Shelly Dimmer 0/1-10V PM Gen3 Shelly EM Gen3
Temperature reading	Depends on the DS18B20 or DHT22 sensors
Humidity reading	Depends on the DHT22 sensor
Digital input	-15 V to 0.5 V (True) / 2.5 V to 15 V (False)*
Analog input range	0 to 100%
Analog input report threshold	1%**
Voltmeter range	0 to 10 V
Voltmeter report threshold	0.1 V**
Analog input / Voltmeter accuracy	Better than ±5%

* Logic can be inverted in the digital input settings

** Can be configured in the analog input/voltmeter settings

Resources

• Shelly Product Documentation
• Printed User Guide (as found within the package)
• Components and APIs
• Declaration of Conformity
• Device Identification
  • Device name: Shelly Plus Add-on
• EAN: 3800235266427

Installation Guides

• Use Shelly Plus 2PM and Add-on with a wind sensor to retract your motorized awning in high winds
• Using Shelly Plus Add-on with a LDR (photoresistor) to control lights
• Using Shelly Plus Add-on to measure soil moisture with a capacitive sensor
• Using Shelly Plus Add-on with a capacitive liquid detection sensor

Handy Shelly Resources

• Shelly Cloud
• Shelly App
  • Apple App Store
  • Google Play
  • Huawei AppGallery
• Home Assistant Shelly Integration
• Shelly Community Forum
• Shelly Facebook Support Group
• Shelly Knowledgebase
• Shelly Device Finder (easy-to-use software to find Shelly devices in the local network)
• Shelly Developer API

Package Contents

• 1x Shelly Plus Add-on
• 1x User Guide