Shelly Pro EM-50 Power Meter

DIN-mountable Single-Phase Energy Meter with Contactor Control

The Shelly Pro EM-50 is a DIN rail mountable two-channel, single-phase energy meter. It has an integrated relay with dry contacts for contactor control.

• 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, web hooks, MQTT, WebSocket, HTTPS, UDP, TLS, custom certificates & Modbus TCP protocol

*Package includes 2 pieces of 50 A Current Transformers

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 Monitoring

Monitors two independent channels on the same phase. Fast notifications and at least 60 days of consumption data in 1-minute intervals.

Specification

Power

• Power supply voltage AC110-240V, 50/60Hz
• Power consumption< 3W
• Max switching voltage AC240V
• Max switching current2A
• Power metering2 channels, up to 50A each

Features

• Mounting Din rail
• Voltmeter (RMS)100-260V
• Voltmeters accuracy±1%
• Ammeters (RMS via CT)0-50A
• Ammeter’s accuracy• ±1% (5-50A)
  • ±2% (0-5A)
• Power and energy meters• Active and apparent power
  • Active and apparent energy
  • Power factor
• No load threshold30VA per phase
• Measurement data storage At least 60 days of 1 minute data resolution
• Data export• CSV for PQ recorded values
  • JSON format export through RPC.
• Webhooks (URL actions)20 with 5 URLs per hook
• Scripting Yes
• Mattes
• Coupon
• Internal temperature sensors
• Ambient temperature-20°C to +40°C / -5°F to +105°F
• Humidity30% to 70% RH

Connectivity

• Wi-Fi protocol802.11 b/g/n (2.4 GHz)
• Wi-Fi range (depending on local construction)
• • up to 50m outdoors
  • up to 30m indoors
• RF band2400-2495 MHz
• Max. RF power<20 dBm
• Bluetooth protocol4.2
• Bluetooth range (depending on local construction)
• • up to 30m outdoors
  • up to 10m indoors

Dimensions

• (H x W x L)
• • 94x19x69 ±0.5 mm
  • 3.70×0.75×2.71 ±0.02 in