fieldbus modem
1Modbus — is a serial communications protocol published by Modicon in 1979 for use with its programmable logic controllers (PLCs). Simple and robust, it has since become one of the de facto standard communications protocols in the industry, and it is now… …
2Meter-Bus — For similarly named bus technologies, see MBus. M Bus (Meter Bus) is a European standard (EN 13757 2 physical and link layer, EN 13757 3 application layer) for the remote reading of gas or electricity meters. M Bus is also usable for other types… …
