Shelly Plus Add-on

This document contains important technical and safety information about the Shelly Plus Add-on device, its safe use, and installation.

CAUTION! Before beginning installation, please read this guide and any other accompanying documents carefully and completely. Failure to follow installation procedures could lead to malfunction, danger to health and life, violation of the law, or refusal of warranty. Allterco Robotics EOOD is not responsible for any loss or damage due to incorrect installation or improper operation.

The Shelly Plus Add-on is a galvanically isolated sensor interface for Shelly Plus devices.

Legend

Device Terminals:

• VCC: Sensor power supply terminals
• DATA: 1-Wire data terminals
• GND: Ground terminals
• ANALOG IN: Analog input
• DIGITAL IN: Digital input
• VREF OUT: Reference voltage output
• VREF+R1 OUT: Reference voltage through a pull-up resistor* output

External Sensor Pins:

• VCC/VDD: Sensor power supply pins
• DATA/DQ: Sensor data pins
• GND: Ground pins

*For passive devices that need it to form a voltage divider.

Installation Instructions

CAUTION! Danger of electrocution. Mounting/installation must be performed with caution by a qualified electrician.

CAUTION! Danger of electrocution. Ensure no voltage is present at the device terminals before making any connection changes.

CAUTION! Use the device only with power grids and appliances that comply with all applicable regulations. Short circuits can damage the device.

CAUTION! Do not connect the device to appliances exceeding the maximum load.

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

CAUTION! Do not install the device where it can get wet.

If installing to a powered Shelly Plus device, ensure breakers are off and terminals have no voltage. Use a phase tester or multimeter. Once confirmed, proceed with installation.

Attach the Shelly Plus Add-on to the Shelly Plus device as shown in Fig. 3. Be careful not to bend the header pins (C) when inserting them into the connector (D). Ensure brackets (A) lock onto the device hooks (B) before wiring.

Connecting Sensors

Digital Sensors (Fig. 1A, 1B):

Connect one DHT22 digital humidity and temperature sensor or up to 5 DS18B20 digital temperature sensors. CAUTION: Do not connect more than one DHT22 sensor or a combination of DHT22 and DS18B20 sensors.

• Fig. 1A & 1B Diagram Description: Diagrams illustrate sensor connections. Figure 1A shows a single DHT22 sensor connected to the Shelly Plus Add-on's VCC, DATA, and GND terminals. It also shows how up to five DS18B20 sensors can be connected in series or parallel to the same terminals, with each DS18B20 having VDD, DATA, and GND pins.

Analog Sensors (Fig. 2A, 2B):

Connect a 10 kΩ potentiometer (Fig. 2A) for smooth analog readings, or a thermistor with 10 kΩ nominal resistance and β=4000 K (Fig. 2B) for analog temperature measurement. The analog input can also measure external voltage sources within the 0 to 10 VDC range (source internal resistance should be less than 10 kΩ).

• Fig. 2A Diagram Description: Shows a potentiometer connected between the ANALOG IN, VREF OUT, and GND terminals of the Shelly Plus Add-on.
• Fig. 2B Diagram Description: Shows a thermistor connected between the ANALOG IN, VREF OUT, and GND terminals of the Shelly Plus Add-on.

Digital Signal Input: The device provides an interface for an auxiliary digital signal via its digital input. Connect a switch/button, relay, or electronic device.

Fig. 3 Diagram Description: Depicts the physical attachment of the Shelly Plus Add-on to a Shelly Plus device. It shows the Add-on's mounting brackets (labeled A) clipping onto the corresponding hooks (labeled B) on the Shelly Plus device. The Add-on's header pins (labeled C) are shown being inserted into the Shelly Plus device's header connector (labeled D).

Specifications

• Mounting: Attached to a Shelly Plus device
• Dimensions (HxWxD): 37x42x15 mm
• Working temperature: -20°C to 40°C
• Max. altitude: 2000 m
• Power supply: 3.3 VDC (from Shelly plus device)
• Electrical consumption: < 0.5 W (without sensors)
• Analog input range: 0 - 10 VDC
• Analog input report threshold: 0.1 VDC
• Analog input sampling rate: 1 Hz
• Analog measurement accuracy: better than 5%
• Digital input levels: -15 V to 0.5 V (True) / 2.5 V to 15 V (False)
• Screw terminals max. torque: 0.1 Nm
• Wire cross section: max. 1 mm²
• Wire strip length: 4.5 mm

*Can be configured in the analog input settings.

**Logic can be inverted in the digital input settings.

Declaration of Conformity

Allterco Robotics EOOD hereby declares that the equipment type Shelly Plus Add-on is in compliance with Directive 2014/30/EU, 2014/35/EU, 2011/65/EU.

The full text of the EU declaration of conformity is available at the following internet address: https://shelly.link/Plus-Addon_DoC

Manufacturer:

Allterco Robotics EOOD
Address: Bulgaria, Sofia, 1407, 103 Cherni vrah Blvd.
Tel.: +359 2 988 7435
E-mail: support@shelly.cloud
Web: https://www.shelly.cloud

Changes in contact data are published by the Manufacturer on the official website: https://www.shelly.cloud

All rights to the Shelly® trademark and other intellectual rights associated with this Device belong to Allterco Robotics EOOD.