Siemens MM4 series is sold in China in recent years the main universal converter , with its 6SE70 / 71 series to form high-low mix, MM4 in power is 250KW or less, 6SE70 / 71 can cover 2.2-2300KW range; MM4 focus on generic, relatively Cheaper, while the 6SE70 / 71 focuses on high performance and multi-drive solutions at high prices. MM4 is divided into the internal: MM410 / 420/430/440, to target a number of different markets, reducing its configuration and cost, and enhance their competitiveness. among them: 1) MM420 power range is: 0.12-11kw, mainly used in OEM industry supporting small and medium power inverter, such as textile, printing, packaging and so on. 2) MM430 power range: 7.5-90KW, mainly used for fan pump applications. 3) MM440 Power range: 0.12-250KW, is MM4 series performance, power, all of the products that can cover the case MM410 / 420/430 can not meet the requirements, provided superior performance, using a variety of control schemes comprises a vector control , To meet the needs of most industries. There is the main difference between applications, 440 the most advanced, with vector control, can be used in demanding situations; 430 is generally used in pumps or fans like the motor; 420 is a general purpose inverter, used in less demanding General frequency conversion occasions. Further, the MM420 three-phase AC power supply or a single-phase AC voltage, having optional fieldbus interface, the conveyor belt may be used, the material conveyors, pumps, fans, and the machine is driven; MM430 special type pumps and fans; all applicable MM440 Transmission with advanced vector control for a wide range of applications, such as conveyor systems, textile machinery, elevators, hoists and construction machinery . 2, as for the difference between MM4 and G series inverter sinamICs G series inverter is introduced in recent years, Siemens products, the price is more expensive than the MM4 series, will gradually replace MM4 products. And G series inverter comes with DP communication interface, unlike the MM4 also need to be equipped with communication card options. If your load is not a fan, pump load, but requires relatively high single-drive applications, I suggest you use the G series inverter. We are a manufacturer of reverse osmosis membrane water treatment. RO Membrane can achieve proper water production and high desalination rate under certain pressure conditions. Used in large-scale industrial and municipal water treatment systems. Through innovative technology, the product has a stronger membrane surface, stronger oxidation resistance, and adopts an extremely low-voltage working mode, which can significantly improve the system and operating economy. ro water system, water filter membrane, Ro Membrane,water filter membrane Hebei Chengda Water Technology Co.,Ltd. , https://www.arclionchengda.com