Product Catalogue

DDS238-4 W Lora wireless type single phase din rail watt hour meter(D1409)

  • DDS238-4 W Lora wireless type single phase din rail watt hour meter(D1409)
  • DDS238-4 W Lora wireless type single phase din rail watt hour meter(D1409)


Display mode:

Display format:
①XXXXXX.X(6-digit integer + 1-digit decimal)

The electricity meter features advanced SoC (System on a Chip) design, SMT (Surface mounting technology) manufacturing process, simple circuit, high reliability and measuring precision to measure active energy, voltage, current, power and power factor. Dual data communication functions of WIFI and RS-485 are available, which feature good anti-interference and anti-attack performances and a wide range of applicable working temperatures to allow for long-term reliable and stable operation. Matched WIFI mobile software helps to realize remote viewing and switch control.

The meter is designed to measure single phase two wire AC active energy and suitable for users of secondary circuits with flat rate tariff or single phase electric equipment with narrow interior space. It is produced by SMT (Surface mounting technology) process and is in accordance with international standard IEC62053-21. RS-485 data communication terminal is available upon request to perform remote data collection.

1. Active energy is measured bi-directionally and total, forward and reverse electricity can be showed.
2. Interval electric quantity display and reset mode available.
3. Realtime current, voltage, active power, reactive power, power factors and frequency measurement and display.
4. LORA wireless communication featuring strong transmissive ability with communication distance more than 1 km in open field.
5. LORA frequency can be customized based on the frequency of customer’s receiver.
6. Remote switch control
7. Ultra-wide voltage operating range from 100V to270V
8. Remote meter reading is available through RS485 communication interface. The baud rate of data communication is 1200bps~9600bps, conform to MODBUS-RTU.
9. Passive pulse output, conform to DIN43864 standard
10. Continuous data saving after power failure and lasting for more than 15 years.
11. Width of the meter is only 76mm. 35mm DIN-rail installation. Similar shape as 4P breaker.
12. All connection lines are incoming and outgoing at the bottom.
13. RS485 to LORA transmitter and LORA to USB receiver available (as required)

Technical Data

Rate voltage 110V~270V(wide voltage operation)
Working voltage range 0.8~1.2Un
Rate Current 5(60)A
Frequency 50Hz or 60Hz +10%
Connection mode Direct type
Display LCD
Accuracy class 1.0
Power consumption < 0.5W/5VA
Start current 0.004Ib
AC voltage withstand 4000V/25mA for 60 sec
Impulse Voltage 6kV 1.2μs waveform
Over current withstand 30Imax for 0.01s
IP grade IP20
Constant 1600~3200 imp/kWh
Pulse output Passive pulse, pulse width is 80+5 ms
Communication port RS485 port , baud rate 1200~9600 bps ,default is 9600bps ,address 1~247,None parity , stop bits 1 , data bits 8 .
Lora transfer distance 2~5km in open space
Executive standard DIN 43880,IEC62053-21,IEC62052-11,MODBUS-RTU
Outline dimension LXMXH 93x76x78mm
Weight Approx 0.36kg


Voltage 0.5%
Current 0.5%
Power Factor 1%
Active power ±1%
Reactive Power ±2%
Active Energy (kWh) Class 1.0


Operating temperature -25℃~55℃
Storage temperature -40℃~80℃
Reference temperature 23℃+2℃
Relative humidity 0 to 95% , non-condensing
Altitude Up to 2500m
Warm up time 10s
Mechanical Environment M1
Electromagnetic Environment E2
Degree of pollution 2

Wire connection

DDS238-4 W Lora wireless type single phase din rail watt hour meter(D1409)

Outline dimension

DDS238-4 W Lora wireless type single phase din rail watt hour meter(D1409)

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