Applications: DDS870 single-phase LCD kilowatt-hour meter module is a kind of electric energy measuring meters, which adopt large-scale compositive circuits and advanced SMT technic of full-automatic patch welding, designed and manufactured with high quality electronic components and superior structure material. And also with strict, mature and reasonable testing, debugging technic and management, so that it can efficiently guarantee the meter running accuracy in measurement, firm structure, and long life motion of requirement. Technical parameters: 1) Rated voltage: AC 220V, 50 / 60Hz 2) Specifications: 2.5(10)A, 5(20)A, 10(40)A, 15(60)A, 20(80)A, 30(100)A 3) Accuracy: Class1, Class2 4) Working temperature: -20 - 55癈 5) Power loss: ≤2.0W 6) Starting current: ≤0.004Ib 7) Executive standards: GB/T 17215-2002 Functions and features: 1) Electric energy display adopts wide temperature LCD screen 2) Adopts double-system clock working model, when power cut off the electricity data can choose display or not display 3) With RS485 and infrared serial port communication (optional) 4) Can do programme setting up for the kilowatt meter, such as meter number and bottom grade 5) Communication conventions adopt DL/T645-1997, with good compatibility 6) Positive and reversed direction voltage displayed by turns (optional) 7) Pulse constant can select by wire jumper 8) Voltage redundancy save, the pulse data also saved if power is interrupted 9) Has pulse indication and communication indication 10) Decimal may select one or 2 digits by wire jumper