Three-phase electric energy meter EM514012

DIN railRS-485residential

Product overview
EM514012 is a three-phase, four-wire electronic multifunction DIN-rail energy meter designed for residential and commercial power distribution. It supports prepaid and postpaid billing modes, local RS485 (Modbus) communication and remote LoRaWAN communication (EU868). A built-in magnetic latching relay enables local and remote on/off control and supports remote meter management.

Key features

• Measurements: bidirectional active/reactive energy, active power, voltage, current, frequency, power factor and demand.
• Communication: LoRaWAN (EU863-870 / EU868) and RS485 with Modbus protocol.
• Bidirectional metering: records forward and reverse energy and power.
• Billing modes: supports prepaid and postpaid models for energy and monetary amounts.
• Built-in magnetic latching relay for load control and remote on/off switching.
• Overcurrent cut-off: configurable threshold and recovery time; relay interrupts supply when threshold exceeded and attempts to reclose after recovery time.
• Alarm and detection: overcurrent, overvoltage, frequency deviation, low balance/charge, and cover/tamper detection.
• Event log: stores events such as recharge, alarms, power outage and tamper; up to 20 entries.

Benefits

• Comprehensive three-phase monitoring for industrial, commercial and large residential installations.
• Wireless long-range communication reduces wiring and infrastructure costs.
• Low power consumption for extended operation and simplified maintenance.
• Remote reading and control enable centralized monitoring, load switching and tariff management.
• Accurate metering and transparent billing for tenants, departments or customers.
• Easy integration with building management systems and IoT platforms.

Dimensions and wiring
Dimensions and wiring diagram are provided as images on the product page for installation reference.

Technical specifications

• Product Name: EM514012
• Reference voltage: 3×230/400 V (±20%)
• Reference current: 0.25-5(100) A
• Impulse constant: 1000 imp/kWh
• LCD display: LCD6+2
• Operating temperature: -40 ~ +70°C
• Relative humidity: <95%
• Reference frequency: 50 Hz
• Accuracy class: Cl.B
• Load control: Built-in magnetic latching relay
• Reference standard: EN 50470-3:2022; EN IEC 62052-11-2021 A11-2022
• Communication: LoRaWAN, RS485 (Modbus)
• Frequency band: EU863-870 MHz (EU868)
• LoRa antenna: SMA socket (base/stick type)