Shelly Pro 3EM Switch Add-on
Galvanically isolated switch designed to expand the capabilities of the Shelly Pro 3EM device. Easily control electrical devices with greater flexibility and control over your consumption. *Only compatible with Shelly Pro 3EM and Pro 3EM 3CT63! Key Features Dry contacts DIN-rail mountable
- Brand: SHELLY
- SKU: 3EM-3CT63
- Shipping:
Learn More
Device identification
Device name: Shelly Pro 3EM Switch Add-on
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
Device electrical interfaces
Inputs
1 load circuit input I
Outputs
1 load circuit output O
Add-on interface
Shelly proprietary serial 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
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
