Modbus Power Meter, PLC power meter , GPRS power meter , RF power meter , etc. , are all smart meters , and they are classified according to environmental communication methods.

In addition to the basic function of power consumption measurement , communication is another key function , stable and reliable communication network to realize human-computer interaction of power management , additional functions have been extended. In the power industry , AMR centralized meter reading system , AMI intelligent advanced measurement system , and intelligent prepaid solution all rely on stable and perfect communication networks. 

A power meter with a RS485 Modbus interface called Modbus Power Meter is a traditional bus communication meter, connected with the concentrator through twisted pair, multiple power meters can be connected in parallel on the twisted pair, generally support 32 nodes.


The number of supports depends on the RS485 communication chip used in the design of the RS485 Modbus power meter, which can reach 128, 256, and the maximum can support up to 400 nodes.

RS485 Modbus power meter communication will use different communication protocols according to application scenarios and different countries and regions, common Modbus, DLT645, IEC1107, DLMS, IDIS, etc., you can also adopt customized communication protocols according to yourself.

The RS485 ModBus power meter is an indispensable tool for energy monitoring and management.The RS485 ModBus power meter is a revolutionary device used to measure energy consumption in various industrial and residential settings. This cutting-edge technology combines the power of RS485 communication and ModBus protocol to provide accurate and reliable data.
With its advanced features, the RS485 ModBus power meter allows for seamless integration with other energy management systems. It can be easily connected to a central monitoring unit, enabling real-time data analysis and efficient energy management.
Moreover, this power meter offers numerous benefits, including high speed, long-distance communication, and multi-drop capability. It can be easily configured and customized to meet the specific needs of different applications.

RS485 Modbus power meter communication rate, also called baud rate, is the number of 0 and 1 codes (or high and low level) sent by the communication port within 1S. The baud rate commonly used in RS485 Modbus power meter is 9600bps, and with the expansion of the acquisition frequency rate requirements at the application level, it will meet the baud rate of 1200bps to 115200bps in the development and design.

RS485 Modbus power meter and concentrator need to use twisted pair for wiring connection (the A interface of the meter RS485 is connected to the A interface of the concentrator RS485, and the B interface of the meter RS485 is connected to the B interface of the concentrator RS485), the installation amount is relatively large, and it is more suitable for the environment of centralized installation in the building. RS485 communication is recommended in point-to-point, line, and bus networks, but cannot be star or ring networks; The maximum transmission distance is about 1200 meters.

RS485 Modbus power meter in the meter reading communication application has obvious advantages, the use of balance drive and differential, receiver combination, strong anti-common-mode interference ability, the use of special communication bus to connect the meter and the concentrator for the communication system to run stably and well, the meter reading system has always maintained a good communication effect and reading success rate. RS485 has two-way communication capability, which can receive and send data at the same time, meeting the communication requirements of smart meters. RS485 Modbus power meteris the most common and the earliest to appear, and has been favored by the market. RS485 Modbus power meter has a wide range of applications, such as residential electricity, shopping mall market power management, industrial electricity monitoring, equipment electricity monitoring, etc.