EMERSON QMP550A4R是艾默生电气公司生产的一款DCS/PLC产品。它属于Unidrive SP系列，是一种独立式的全工程交流驱动器。这款产品的配置包括一个独立的速度控制器，可以实现变速和再生的功能。它的工作温度范围是0至40摄氏度（32至104华氏度）。此外，它的交流输入电压为500到690伏，直流电流为533安培。

It is a DCS/PLC product produced by Emerson Electric Company. It belongs to the Unidrive SP series and is a standalone fully engineering AC drive. The configuration of this product includes an independent speed controller that can achieve variable speed and regeneration functions. Its operating temperature range is 0 to 40 degrees Celsius (32 to 104 degrees Fahrenheit). In addition, its AC input voltage is 500 to 690 volts and its DC current is 533 amperes.