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Shelly PRO EM - 50 is a heavy-duty Wi-Fi energy meter DIN


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Shelly PRO EM - 50 is a heavy-duty Wi-Fi energy meter DIN


Code S3800235268148
Manufacturer code 3800235268148
Availability 6 pc.
Usually ships within: 1-2 business days
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Shelly Pro EM-50

Shelly Pro EM

Device identification

  • Device name: Shelly Pro EM-50

  • Device model: SPEM-002CEBEU50

  • Device SSID: ShellyProEM50-XXXXXX

Short description

Shelly Pro EM-50 (The Device) is a DIN rail mountable two-channel, single-phase energy meter. Enhanced with all the gen2 firmware flexibility and LAN connectivity, it provides professional integrators with additional options for end-customer solutions. It can work standalone in a local LAN and/or Wi-Fi network, or it can also be operated through cloud home automation services through MQTT, HTTP, and WebSocket. All inbound connections support TLS.

The Device reports accumulated energy as well as instantaneous voltage, current, active, and apparent power per phase in real time. It stores data in non-volatile memory that can be retrieved for a period of up to 60 days in 1-minute intervals.

The Device has a real-time clock to keep the correct time if the connection to an SNTP server is lost.

Shelly Pro EM-50 can be accessed, set up, and monitored remotely by the User, as well as the Device can access and communicate with an automation system, as long as they are in the same network infrastructure.

The Device has an embedded Web Interface which can be used to monitor and control the device, as well as adjust its settings.

The Device has a built-in relay for contactor control.

Features

  • 4 Quadrant measurement

  • DIN rail mounting

  • Current transformer connection

  • External contactor control via built in dry-contact relay

  • Optical pulse indication of energy usage

  • Real-time clock

  • Data logs

  • Accuracy Class B (IEC 62053-21)

  • Photovoltaic ready

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 EM internal schematics

Device electrical interfaces

Inputs

  • 2 line inputs on screw terminals: 1 L and 1 N

  • 2 current transformer inputs: IA and IB for current measurement

Outputs

  • 2 galvanically isolated relay terminals: I and O

 

Ethernet port

  • 1 RJ45 connector

⚠CAUTION! Plug in or unplug the LAN cable only when the Device is powered off! The LAN cable connector must not be metallic in the parts touched by the user to plug in or unplug the cable.

Add-on interface

  • Shelly proprietary serial interface

 

 

Pro-EM-addon-interface.png

 

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

Connectivity

  • Wi-Fi

  • Ethernet

  • Bluetooth

Each connectivity option can be enabled or disabled by the user.

Safety features

  • Overheating protection

Supported load types

  • Resistive (incandescent bulbs, heating devices)

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

  • Inductive (transformers, fans, refrigerators, air-conditioners)

User interface

Inputs

  • One tactile dome button

    • Press briefly to toggle the state of the built-in relay.

    • Press and hold for 5 sec to activate Device AP.

    • Press and hold for 10 sec to factory reset.

Outputs

  • LED indication

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

    • Wi-Fi (varies):

      • Blue light if in AP mode.

      • Red light if in STA mode, and not connected to a Wi-Fi network.

      • Yellow light if in STA mode, and connected to a Wi-Fi network. Not connected to Shelly Cloud or Shelly Cloud disabled.

      • Green light if in STA mode, and connected to a Wi-Fi network and the Shelly Cloud.

      • The LED will be flashing Red/Blue if OTA update is in progress.

    • LAN: Green light if LAN is connected.

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

    • Count: Red light will be flashing when the Device is measuring energy according to settings with frequency dependent on the energy flowing through the measured circuit.

Specifications

Type

Value

Physical

Size (HxWxD):

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

Weight:

63 ±1 g / 2.22 ±0.05 oz

Mounting:

DIN rail

Screw terminals max torque:

0.4 Nm / 4.43 lbin

Conductor cross section:

0.5 to 2.5 mm² / 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:

100 - 260 V, 50/60 Hz

Power supply voltage DC:

N/A

Power consumption:

< 3 W

Output circuits ratings

Max switching voltage AC:

240 V

Max switching voltage DC:

N/A

Max switching current:

2 A

Sensors, meters

Internal-temperature sensor:

Yes

Voltmeter (RMS):

100 - 260 V

Voltmeters accuracy:

±1 %

Ammeters (RMS via CT):

0 - 50 A

Ammeters accuracy:

±1 % (5 - 50 A), ±2 % (0 - 5 A)

Power and energy meters:

  • Active and apparent power

  • Active and apparent energy

  • Power factor

Measurement data storage:

At least 60 days of 1 min data resolution

Data export:

  • CSV for PQ recorded values

  • JSON format export through RPC

Radio

RF band:

2400 - 2495 MHz

Max. RF power:

<20 dBm

Wi-Fi protocol:

802.11 b/g/n

Wi-Fi Range:

Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors
(Depends on local conditions)

Bluetooth Protocol:

4.2

Bluetooth Range:

Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors
(Depends on local conditions)

MCU

CPU:

ESP32-D0WDQ6

Flash:

16 MB

Firmware capabilities

Webhooks (URL actions):

20 with 5 URLs per hook

Scripting:

Yes

MQTT:

Yes

CoAP:

No

Basic wiring diagrams

Shelly Pro EM wiring diagram

Legend

Terminals

Cables

O

Load circuit output terminal

L

Live (110-240 V) cable

I

Load circuit input terminal

N

Neutral cable

IA

First channel current transformer input

Current transformers

IB

Second channel current transformer input

CTA

First channel current transformer

L

Live (110-240 V) terminal

CTB

Second channel current transformer

N

Neutral terminal

 







 
Our company was established in 2008 and is one of the leading CCTV cameras and equipment suppliers in Estonia and the Baltics. The most new models and technologies, the latest products from the most famous manufacturers of security equipment for video surveillance systems, and security systems can be found in the equipment catalog on our website.
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