The Power Meter (PM) enables high-precision measurement of voltage, current, frequency, and other parameters, while simultaneously supporting power quality monitoring. It features 4-channel temperature measurement and 2-channel AC220V active digital inputs. Utilizing PowerBUS 24V power supply bus and RS-485 communication interface, it can be seamlessly integrated into various energy management systems. With its compact design and standard DIN-rail mounting, installation is simple and convenient. This device is suitable for widespread applications in rail transportation, smart buildings, low-voltage power distribution systems, energy management systems, and industrial automation.