FREELANCE 2000

process control instrumentation, namely, [ operator interface units, namely, operator stations, engineering stations, ] namely, process control units, namely, central processor unit modules for modulating and sequential control, process control communication modules, namely, digital input and output modules, analog input and output modules, process communication units, namely, communication modules for diagnosis, power supply modules, racks for housing modules, process control application software, namely, software for configuration and engineering, for operation and observation, [ for dynamic data exchange, for user groups with various access rights, for viewing trends and logs on external personal computers, and for batch control ]