Reliable error-free industrial communications using advanced carrier modulation techniques
M.E. Maes, J.R. Steffey · 2002
Advanced carrier modulation (CM) technology can be applied to conditions requiring the utmost reliability and "user friendly" ease of installation, operation and reconfiguration, often at significantly lower cost. The technology supports data transmission for a wide variety of applications, such as process control, data acquisition, monitoring, energy management, access control, etc. Modular, portable units may be used for point-to-point, multi-drop, polling/addressing, multiplexing or full LAN applications transmitting discrete, analog (4-20 mA, 0-5 volt, etc.), pulse or digital (RS232, 422, 485) data.