Wi-Fi Energy Meter with Contactor Control Shelly Pro EM 50A - SHELLY

Shelly Pro EM-50 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.

Shelly Pro EM-50 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.

Your Smart Solution for Accurate Energy Monitoring and Control

Shelly Pro EM-50 is a DIN-mountable 1-Phase Energy Meter with an integrated switch for contactor control. With active energy measurement accuracy of 1%, Shelly Pro ЕМ-50 can be used to monitor the consumption of and control any home appliances, electric circuits, and office equipment. It features 60 days of on-device historical data with a 1-minute resolution. Additionally, its scripting functionalities allow for the execution of complex scenes and provide broader monitoring abilities.

Wi-Fi, LAN and Bluetooth connectivity

Simultaneous Ethernet and Wi-Fi usage. MQTT, inbound and outbound WebSocket, UDP, mTLS support.

Accuracy class B (active energy)

Shelly Pro EM-50 has a measurement accuracy of 1%.

MODBUS support

Allows for easy and fast deployment in existing industrial installations.

Power measurement

Monitors two independent channels on the same phase.

Integrated switch

2 A dry contacts switch for contactor control.

Scripting

Shelly Pro EM-50 fully supports mjS scripting, allowing you to create further features and functionalities.

Note : Package includes 2 pieces of 50 A Current Transformers

FONCTIONS :

• LAN, Wi-Fi and Bluetooth connection for high security and reliability
• Reports accumulated energy, as well as instantaneous voltage, current, active and apparent power per phase in real time
• Power metering - two independent measurement channels on the same phase
• 4 Quadrant measurement with optical pulse indication of energy usage
• Can be used with contactors for bigger loads
• Accuracy Class B (IEC 62053-21)
• Photovoltaic ready
• Stores data in non-volatile memory that can be retrieved for a period of up to 60 days in 1-minute intervals.
• No hub required! Easy control through the Shelly Smart Control app, most platforms and protocols, as well as voice assistants. Use it with Alexa, Home Assistant, or your preferred automation system.
• Supports scripting, webhooks, MQTT, WebSocket, HTTPS, UDP, TLS and custom certificates & Modbus TCP protocol

TECHNICAL SPECIFICATIONS :

• PHYSICAL
• Size (HxWxD): 94x19x69 ±0.5 mm
• Weight: 63 ±1 g
• Mounting: DIN rail
• Screw terminals max torque: 0.4 Nm
• 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
• Shell material: Plastic
• Color: White
• ENVIRONMENTAL
• Ambient temperature: -20 °C to 40 °C
• Humidity: 30 % to 70 % RH
• ELECTRICAL
• Power supply voltage AC: 110 - 240 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
• No load threshold: 30 VA per phase
• 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 (Depends on local conditions)
• Bluetooth Protocol: 4,2
• Bluetooth Range: Up to 10 m / 33 ft indoors and 30 m (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