Shelly Pro 3EM Switch Add On

Shelly Pro 3EM Switch Add-on

Device identification

 

Short description

Shelly Pro 3EM Switch Add-on (the Device) is a galvanically isolated switch that extends the features of the Shelly Pro 3EM series of devices allowing the control of contactors or other electrical appliances.

Main applications

  • Residential

  • MDU (Multi Dwelling Units - apartments, condominiums, hotels, etc.)

  • Light commercial (small office buildings, small retail/restaurant/gas station, etc.)

  • Industrial (factories, power plants, water processing, refineries, etc.)

  • Agricultural (farms, barns, silos, etc.)

  • Government/municipal

  • University/college

 

Simplified internal schematics

Shelly Pro 3EM Switch Add-on internal schematics

Device electrical interfaces

Inputs

  • 1 load circuit input I

Outputs

  • 1 load circuit output O

Add-on interface

  • Shelly proprietary serial interface

Shelly Pro 3EM Switch Add-on add-on interface

?CAUTION! High voltage on the add-on interface when the Device is powered!

 

Safety features

  • Internal temperature sensing and reporting

 

Supported load types

  • Resistive (incandescent bulbs, small heating devices)

  • Capacitive (LED light drivers, capacitor banks, electronic equipment)

  • Inductive (contactors, transformers, fans, refrigerators)

 

User interface

Outputs

  • LED indication

    • Power: Red light if the power supply is connected.

    • Out: Red light if the output relay contact is closed.

 

Specifications

Type

Value

Physical

Size (HxWxD):

94x19x69 ±0.5 mm / 3.70x0.75x2.71 ±0.02 in

Weight:

20 ±1 g / 0.70 ±0.05 oz

Mounting:

DIN rail, attached to a Shelly Pro 3EM

Screw terminals max torque:

0.4 Nm / 4.43 lbin

Conductor cross section:

0.5 to 2.5 mm? / 20 to 14 AWG (solid, stranded and bootlace lugs)

Conductor stripped length:

6 to 7 mm / 0.24 to 0.28 in

Shell material:

Plastic

Color:

White

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 voltage AC:

N/A

Power supply voltage DC:

3.3 V and 12 V (from Shelly Pro 3EM device)

Power consumption:

< 1 W

Sensors, meters

Internal-temperature sensor:

Yes

Output circuits ratings

Max switching voltage AC:

240 V

Max switching voltage DC:

30 V

Max switching current AC:

2 A

Max switching current DC:

2 A

 

Basic wiring diagrams

 

Shelly Pro 3EM Switch Ad-on

 

Resistive load

 

Inductive load and RC snubber

Legend

Terminals

Wires

O

Load circuit output terminal

L

Live (110-240 V) wire

I

Load circuit input terminal

N

Neutral wire

 

Components and APIs

Compliance

Shelly Pro 3EM Switch Add-on multilingual EU declaration of conformity.pdf

Printed user guide

Shelly Pro 3EM Switch Add-on multilingual printed user and safety guide.pdf