EM427 120/240V 10(100)A smart electricity kwh meter
single phase digital 120v din rail watt-hour meter 
- single phase digital 120/240V
- 4 DIN modules, Standard DIN rail Format (DIN43880)
- IEC62053-21/22 Class 1.0,0.5S
- Import &Export active energy
- Import &Export reactive energy
- Instant Volt, Amp, Power factor, Frequency, Active power, Reactive
power, Apparent power
- Isolate pulse output (DIN43864)
- LCD display, 6 integer 2 decimal , meter display when power fails
- Large clear backlight display
- Internal transformer
- Direct metering up to 100A
- RS485 communication port, modbus protocol
- IR port
- Program by button on the nameplate
- Memory back-up (EEprom)
- CE approval
specification :
Electrical Characteristics | EM427 |
Voltage(v) | 120/240v |
Operational voltage | (70-130)%Un |
Current(A) |
- Iref | 10A |
-Itr | 1A |
-Imax | 100A |
-Imin | 0.5A |
-Ist | 40mA |
Power consumption of current circuits(VA) | < 0.01 |
Power consumption of voltage circuits(W) | < 1.3W |
General data |
Frequency (Hz) | 50/60 |
Memory back-up | EEprom |
Environment resistance to heat and fire | Terminal 960°C Cover 650°C |
Enclosure material |
upper | ABS+PC |
lower | ABS+PC |
Pulse output |
Pulse width(ms) | 80 |
Pulse constant(imp/kWh) | 1000 |
LED |
LED constant | 1000 |
Dimension |
Width (mm) | 72 |
Height (mm) | 104.5 |
Depth (mm) | 60 |
Dimension :
Wiring diagrams:
3 Wire with RS485: 2 wire with RS485 :
Main function:
Measuring Function:
Meter can measure import & export active energy , import & export
reactive energy.
Display function :
Smart meter have two status: cycle display status andbutton press display .When pressing the button, User can set according their request. Button press will Backlight
the LCD. Display cycle can be set within 5~20 seconds, The default
is 5 seconds.
Electricity parameters measurement and monitoring :
Measure record and display voltage, current, power and power factors. error
is not more than ±1%.
Communication Function :
With an infrared COM and a RS485 COM. Communication protocols fit
Modbus RTU standard. RS485 communications transfer rates allow
selected at 1200bps, 2400bps, 4800 bps and 9600bps, default is
9600bps.
Alarm function:
When the meter connect wire wrong example: current reverse, the
meter will display , the ALARM led will be on.
Pulse output function :
Smart meter is equipped with a pulse output which is fully separated from the
inside circuit. That generates pulses in proportion to the measured
energy .include the testing pulse output of active energy and
reactive energy. 8/ 11 Test pulse output contact (P+/P-).
