Shelly Pro EM-50 DIN Rail Energy Meter, 50 A

Shelly Pro EM-50 is a two-channel single-phase energy meter designed for DIN rail mounting. Enhanced with Gen2 firmware flexibility and LAN connectivity, it offers professional integrators additional options for end-customer solutions. It can operate independently on a local LAN and/or Wi-Fi network or be used via home automation cloud services through MQTT, HTTP, and WebSocket. All incoming 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 persistent memory, which can be retrieved for up to 60 days at 1-minute intervals. The device has a real-time clock that keeps accurate time if the connection to the SNTP server is lost.

The Shelly Pro EM-50 can be used, configured, and monitored remotely and can communicate with the automation system as long as they are on the same network infrastructure. The device features a built-in web interface for monitoring and controlling the device and adjusting its settings. It includes a built-in relay for contactor control.

Installed on Wi-Fi network, no need for a separate central unit.

Features:

• LAN, Wi-Fi, and Bluetooth connections
• DIN rail mounting
• Real-time measurement of accumulated energy and instantaneous voltage, current, active, and apparent power per phase
• Power measurement - two measurement channels on the same phase
• Accuracy class B (IEC 62053-21)
• Solar power ready
• Real-time clock

Technical specifications:

• Power and energy measurement: active and apparent power, active and apparent energy, power factor
• Unloaded threshold: 30 VA / phase
• Measurement data storage: at least 60 days, with 1-minute accuracy
• Temperature sensor: yes
• Voltage measurement (RMS): 100 - 260 V
• Voltage measurement accuracy: ±1 %
• Current measurement (RMS via CT): 0 - 50 A
• Current measurement accuracy: ±1 % (5 - 50 A), ±2 % (0 - 5 A)
• Data transfer: in CSV format
• JSON transfer via RPC
• RF frequency band: 2400 - 2495 MHz
• Max. RF power: < 20 dBm
• Wi-Fi protocol: 802.11 b/g/n
• Wi-Fi range: up to 30 m indoors and 50 m outdoors (depends on local conditions)
• Bluetooth protocol: 4.2
• Bluetooth range: up to 10 meters indoors and 30 meters outdoors (depends on local conditions)
• CPU: ESP32-D0WDQ6
• Flash: 16 MB
• Webhooks (URL actions): 20, each with 5 URL addresses per action
• Scripting: Yes
• MQTT: Yes
• CoAP: No
• Operating voltage: 110 - 240 V, 50/60 Hz
• Power consumption: < 3 W
• Maximum switching voltage: 240 V AC
• Maximum switching current: 2 A
• Mounting: DIN rail
• Enclosure material: plastic
• Operating environment: -20 °C ... +40 °C / 30 % ... 70 % RH / 2000 m (max.)
• Dimensions (H x W x D): 94 x 19 x 69 mm (±0.5 mm)
• Weight: 63 g (±1 g)