M-Bus (Meter-Bus) is a communication interface widely used for remote reading of meters such as: electricity meters, water meters, heat meters, etc. It is easy to install for its two-wire system already includes power and communication function. It also features   the most important feature: robustness. M-Bus has its own physical layer and protocol. Therefore, it is usually required to be switched to other systems, such as Modbus, to facilitate the overall application. Modbus RTU is one of the most common communication standards in automation. ICP DAS developed the gateway GW-7828 for Modbus RTU to M-Bus, allows the direct transmission of meter data to a control system using Modbus RTU. The GW-7828 supports operating up to 100 meters on the M-Bus. The GW-7828 serves as a Modbus RTU slave gateway via RS-232, RS-422 or RS-485. After an initial configuration by M-Bus utility, GW-7828 will read out the meter data automatically. The PLC or PC as a Modbus RTU master can access meter data via a serial connection easily.



 

Specifications & Features:

• Supports M-Bus standard: EN-13757, CJ/T-188
• Supports up to 100 M-Bus slaves
• Supports Modbus RTU function code 0x03 and 0x04
• Serial Baud and M-Bus Baud can be configured separately
• Provides 10 kinds of Baud for default, 6 kinds of Baud for user-defined
• Allows updating firmware by the RS-232 port
• M-Bus overloading alarm
• Overcurrent and short-circuit protection on the M-Bus port
• 3750 Vrms photo-couple isolation on the M-Bus port
• ±4 kV ESD to contact
• Reverse polarity protection on power
• Watchdog inside
• Provide 3 LED indicators, PWR LED, MTX LED and MRX LED

 

Utility:

• Provide EN-13757 and CJ/T-188 meter configuration
• Provide M-Bus user-defined baud rate
• Provide serial bus user-defined baud rate
• Check firmware version
• M-Bus meter reader test
   

For more information, please visit the following website:
https://www.icpdas.com/en/product/GW-7828