A Design for the Remote Link Unit---A Multiprocessor Remote Terminal
John R. Glover, Carlos J. Tavora · IEEE Transactions on Industrial Electronics and Control Instrumentation · 1981
The Remote Link Unit (RLU) is an advanced remote terminal which provides a complete interface between a CPU and remote subsystems. The RLU consists of several intelligent Link Modules (LM) which provide the direct interfaces to the subsystems, and an intelligent Link Manager (LMG) which maintains control over the LM's and supervises communications with the CPU. By implementing the RLU with a hierarchy of specialized processors, it is possible to achieve with the RLU highly efficient, reliable, and flexible operation.