Shelly Pro EM-50: Single-Phase Energy Meter User & Safety Guide

Product Introduction

Shelly® devices are innovative microprocessor-managed products designed for remote control of electric circuits via mobile phone, tablet, PC, or home automation systems. They can operate independently on a local Wi-Fi network or integrate with cloud home automation services. The Shelly Cloud service is accessible via Android or iOS mobile applications or any internet browser at https://control.shelly.cloud/. Shelly devices offer remote access, control, and monitoring when connected to a Wi-Fi router and the internet. An Embedded Web Interface is available at http://192.168.33.1 (or the device's local IP address) for configuration and control. Shelly devices can communicate with other Wi-Fi devices via HTTP protocol, with an API provided by Shelly Europe Ltd. available at https://shelly-api-docs.shelly.cloud/#shelly-family-overview.

Shelly devices are shipped with factory-installed firmware. Shelly Europe Ltd. provides firmware updates, including security updates, free of charge via the device's Embedded Web Interface or the Shelly mobile application. Users are solely responsible for installing these updates.

Shelly Pro Series

The Shelly® Pro series comprises devices suitable for homes, offices, retail stores, and manufacturing facilities. These devices are DIN rail mountable within breaker boxes, making them ideal for new construction. Shelly® Pro devices support Wi-Fi and LAN connections for control and monitoring, with Bluetooth available for the inclusion process.

The Shelly Pro EM-50 is a DIN rail mountable, single-phase, dual-channel energy meter featuring a dry contact relay for contactor control. It provides real-time accumulated energy, voltage, current, and power factor data, storing at least 60 days of 1-minute resolution data in non-volatile memory.

Schematic

Fig. 1 illustrates the wiring diagram for the Shelly Pro EM-50. It shows the device connected to a power supply via Live (L) and Neutral (N) terminals. Two current transformers (CTA and CTB) are depicted, each clamped around a load circuit cable, with their outputs connected to the device's IA and IB input terminals, respectively. The device itself contains internal components such as a relay output (O) and a relay input (I), along with connections for power, Wi-Fi, LAN, and a reset button.

Legend

• Device terminals: [Relay Output] (O), [Relay Input] (I), [Current Transformer A Input] (IA), [Current Transformer B Input] (IB), [Neutral Terminal] (N), [Live Terminal] (L)
• Cables: [Neutral Cable] (N), [Live Cable] (L)

Installation Instructions

[CAUTION!] Danger of electrocution. Installation to the power grid must be performed 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 compliant with all applicable regulations. Short circuits may damage the device.

[CAUTION!] Do not connect appliances exceeding the maximum load ratings.

[CAUTION!] Connect the device strictly as shown in these instructions to avoid damage or injury.

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

[CAUTION!] Plug or unplug the LAN cable only when the device is powered off. The LAN cable must not have metallic parts accessible to the user during connection/disconnection.

[ RECOMMENDATION:] Connect the device using solid single-core cables or stranded cables with ferrules. Use cables with insulation rated for increased heat resistance, not less than PVC T105°C (221°F).

[CAUTION!] The device and its load current circuit must be protected by a cable protection switch compliant with EN60898-1 (tripping characteristic B or C, max. 2 A rated current, min. 6 kA interrupting rating, energy limiting class 3).

Before installation, turn off all breakers and verify there is no voltage present at the terminals using a phase tester or multimeter.

Follow Fig. 1 to install the current transformer CTA around the cable of one load circuit and CTB around the cable of another load circuit.

Mount the device onto the DIN rail.

Connect the cables from CTA and CTB to the device's IA and IB input connectors, respectively.

Connect the Live cable through a circuit breaker to the L terminal and the Neutral cable to the N terminal.

After verifying all connections, turn on the circuit breakers.

Initial Inclusion

For integration with the Shelly Smart Control mobile application and cloud service, refer to the mobile application guide for connection and control instructions. The Shelly mobile application and Shelly Cloud service are optional; the device functions properly standalone or with other home automation platforms.

[CAUTION!] Do not allow children to play with the device's connected buttons/switches. Keep remote control devices (mobile phones, tablets, PCs) away from children.

LED Indication

• [Power LED]: Red light when power supply is connected.
• [Wi-Fi LED] (varies):
  • Blue light: AP mode.
  • Red light: STA mode, not connected to Wi-Fi.
  • Yellow light: STA mode, connected to Wi-Fi but not to Shelly Cloud or Shelly Cloud disabled.
  • Green light: STA mode, connected to Wi-Fi and Shelly Cloud.
  • Flashing Red/Blue: OTA update in progress.
• [LAN LED]: Green light when LAN is connected.
• [Output Relay LED]: Red light when the relay is closed.
• [Energy Measurement LED]: Red light flashes when the device is measuring energy, with frequency dependent on the energy flow.

User Button

• Press and hold for 5 seconds to activate Device AP mode.
• Press and hold for 10 seconds for a factory reset.

Specifications

• Dimensions (HxWxD): 94 x 19 x 69 mm / 3.70 x 0.75 x 2.71 in
• Mounting: DIN rail
• Ambient Temperature: -20 °C to 40 °C / -5 °F to 105 °F
• Humidity: 30% to 70% RH
• Max. Altitude: 2000 m / 6562 ft
• Power Supply: 100 - 260 VAC, 50/60Hz
• Electrical Consumption: < 3 W
• Max. Switching Voltage: 260 VAC
• Max. Switching Current: 2 A
• Internal Temperature Sensor: Yes
• Voltmeters (RMS per phase): 100 - 260 V
• Voltmeters Accuracy: ±1%
• Ammeters (RMS via CT): 0 - 50 A
• Ammeters Accuracy: ±1% (5-50 A), ±2% (1-5 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 via RPC
• External Protection: Max. 2 A, tripping characteristic B or C, 6 kA interrupting rating, energy limiting class 3
• Wi-Fi Frequency: 2412-2462 MHz
• Wi-Fi Protocol: 802.11 b/g/n
• Wi-Fi Operational Range: up to 50 m / 160 ft outdoors, up to 30 m / 100 ft indoors (local conditions apply)
• Bluetooth Protocol: 4.2
• Bluetooth Frequency: 2402 - 2480 MHz
• Bluetooth Operational Range: up to 30 m / 100 ft outdoors, up to 10 m / 33 ft indoors (local conditions apply)
• LAN/Ethernet (RJ45): Yes
• CPU: ESP32
• Flash: 16 MB
• Schedules: 20
• Webhooks (URL actions): 20 with 5 URLs per hook
• Scripting: Yes
• MQTT: Yes

Declaration of Conformity

Shelly Europe Ltd. declares that the radio equipment type Shelly Pro EM-50 complies with EU Directives 2014/53/EU, 2014/35/EU, 2014/30/EU, and 2011/65/EU. The full text of the EU declaration of conformity is available at: https://shelly.link/ProEM-50_DoC.

FCC Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits for an uncontrolled environment. Installation and operation should maintain a minimum distance of 20cm between the radiator and the user's body.

FCC Warning: This device complies with Part 15 of the FCC Rules. Operation is subject to two conditions: (1) it may not cause harmful interference, and (2) it must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, designed to provide reasonable protection against harmful interference in residential installations. If interference occurs, users are encouraged to try correcting it by reorienting or relocating the receiving antenna, increasing separation between equipment and receiver, or connecting the equipment to a different circuit outlet. Consult the dealer or a qualified technician for assistance.

Note 2: Modifications not expressly approved by the party responsible for compliance may void the user's authority to operate the equipment.

Manufacturer Information

Manufacturer: Shelly Europe Ltd.

Address: 103 Cherni vrah Blvd., 1407 Sofia, Bulgaria

Tel.: +359 2 988 7435

E-mail: support@shelly.cloud

Official Website: https://www.shelly.com

Contact information updates are published by the Manufacturer on the official website. All rights to the Shelly® trademark and other intellectual rights associated with this device belong to Shelly Europe Ltd.