M-Bus is a data system designed to transmit information for consumption measuring instruments and counters. M-Bus has many applications in building and industrial energy consumption data acquisition.

For a remote meter reading system, the data transmitted on the line is the important data such as water, electricity and gas consumed by the end user. Therefore, the requirements for the line's anti-external interference are very high. To be able to resist various capacitive and inductive coupling interference, all the slave devices, slave devices and master devices are isolated from each other. At the same time, it is required that the networking cost is relatively low, the transmission line does not need to use shielded cables, and in order to save costs, it is necessary to use remote power supply to provide power to the slave equipment, so as to minimize the use of components. To solve these practical problems, we must adopt a suitable bus structure.

At present, M-BUS has been included in the industry standard by the Ministry of Construction. It has a series of advantages, such as non-polarity of two lines, no topological requirements for wiring, self-power supply of lines, strong anti-interference ability, multiple relay levels, multiple levels with terminals, simple and reliable. It is the best standard for the application of automatic meter reading system at present. M-Bus meets the needs of networking and remote meter reading of utility instruments, and it can also meet the special requirements of remote power supply or battery power supply system. The topology of M-Bus serial communication mode is very suitable for the reliable and low-cost networking requirements of utility instruments, and can connect hundreds of slave devices at a distance of several kilometers.

This is a high-quality M-BUS smart meter, which is a three-phase four-wire multi-function DIN rail type high accuracy energy meter. It uses a shunt sampling method, has high accuracy, M-BUS communication, M-BUS protocol, anti-magnetic field 200mT, supports LCD display, standard din rail-type installation, convenient installation, compact size, and is widely used in household or commercial power systems and other power consumption systems.

1. Comply with EN50470-1/3 standard 2. Voltage specification: three-phase 3 x230 (400) V ± 20% 3. Current specification: 5 (80) A 4. Accuracy class: active 1.0 reactive 2.0 5. Protection grade: IP51 (indoor use only) 6. The metering mode can be configured: absolute value metering, algebraic sum metering, and counting forward only 7. It can measure voltage, current, power, power factor and electricity 8. Support active and reactive power, demand and tariff 9. Installation mode: din rail type, small size, convenient installation 10. Working temperature: - 40~+70 ℃

At present, there are a variety of communication modes for instruments in the market. M-bus still occupies a place in the market with the advantages of low cost and high stability. The M-bus electricity meters developed and manufactured by YTL continue to develop and update according to the market demand, and have polished out stable and reliable main products suitable for the market demand.