Multifunctional Electric Power Parameter Meter
The EM123 rail-mounted multifunctional power parameter meter provides a cost-effective solution for internal sub-metering, itemized metering, energy management, and other applications.
The EM123 features 0.5 class high accuracy, optional single rate or 8/12 time period 4 rates, standard RS485 communication interface, supporting Modbus RTU or DL/T645 protocols. Supports single-phase and three-phase.
The EM123 is compact, with a 35mm standard rail mount, direct connection for currents below 50A, voltage signal powered, no auxiliary power required. Easy to install, simple wiring, low engineering workload, especially suitable for distribution box installation and various new construction and renovation projects.
The EM123 supports 2 channels of switch input and 2 channels of switch output functions (only applicable to three-phase meters) to achieve local or remote switch signal monitoring and control output functions ("remote signaling" and "remote control" functions).
The EM123 features a 7-digit LCD display with data cycling.
- Commodity name： Multifunctional Electric Power Parameter Meter
- Commodity ID： EM123
- Product Description
- Summary
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Product Performance
Technical Parameters
Performance
Accuracy
Current, Voltage: Class 0.3, Active Energy: Class 0.5
Display
7-digit LCD
Voltage Un
Single-phase: AC 220V, Three-phase: AC220V×3
Current
1.5(6)A, 5(20)A, 10(40)A, 20(80)A;
For currents above 50A, it is recommended to use an external current transformer with a secondary current of 5A. Medium and high voltage systems: 1.5(6)A (must use an external measuring CT with a secondary current of 5A);
Frequency
50Hz, 60Hz
Clock Accuracy
Error ≤0.5s/day
Voltage Range
Normal operating voltage: 150V～265V
Power Consumption
<5VA
Energy Pulse Output
Standard with one active energy pulse output; passive output, external power supply DC5～24V
Communication
Standard RS485 interface and infrared communication, supports MODBUS-RTU or DL/T645 protocol
Switch Input
Optional: 2 switch inputs (dry contact type)
Switch Output
Optional: 2 relay outputs with normally open contacts, relay contact capacity: AC220V/5A
Operating Environment
-10～60℃, relative humidity ≤93%, no corrosive gases, altitude ≤2500m
Installation Method
35mm DIN rail mounting
Dimensions
Single-phase: 76×89×76mm, Three-phase: 144×85×75mm
Functional Features
■ Measurement: single-phase/three-phase voltage, current, forward/reverse active energy;
■ Automatic identification and indication of power direction;
■ Optional multi-rate (TOU) function, can set 4 rates: peak, high, flat, valley, with 8 or 12 time periods;
■ Display: 7-digit LCD display;
■ Optional 2 switch status inputs and 2 switch outputs for alarm or communication switching; (only applicable to three-phase meters)
■ Communication: standard RS-485 communication interface and infrared communication, MODBUS-RTU or DL/T645 protocol optional; standard with one active energy pulse output (user needs to connect external DC5～35V voltage);
■ Voltage signal powered, no auxiliary power required;
■ Circuits below 50A can be directly connected without current transformer; for currents above 50A, it is recommended to use an external current transformer with a secondary current of 5A (medium and high voltage applications: voltage connected via PT, current connected via CT);
■ 35mm standard DIN rail mounting;
■ Main unit size: single-phase: 76×89×76mm, three-phase: 144×85×75mm
Wiring Method
■ Low voltage single-phase application
■ Low voltage three-phase four-wire application
■ Medium and high voltage three-phase three-wire application
■ Optional 2DI/2DO wiring method
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The EM123 rail-mounted multifunctional power parameter meter provides a cost-effective solution for internal sub-metering, itemized metering, energy management, and other applications.
The EM123 features 0.5 class high accuracy, optional single rate or 8/12 time period 4 rates, standard RS485 communication interface, supporting Modbus RTU or DL/T645 protocols. Supports single-phase and three-phase.
The EM123 is compact, with a 35mm standard rail mount, direct connection for currents below 50A, voltage signal powered, no auxiliary power required. Easy to install, simple wiring, low engineering workload, especially suitable for distribution box installation and various new construction and renovation projects.
The EM123 supports 2 channels of switch input and 2 channels of switch output functions (only applicable to three-phase meters) to achieve local or remote switch signal monitoring and control output functions ("remote signaling" and "remote control" functions).
The EM123 features a 7-digit LCD display with data cycling.
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