Distributed Input/Output is commonly used to reduce installation cost, " home-run" wiring, and potential noise interference. REMOTE ACCES pods installed in RIDACS systems let you install interfaces and control outputs close to the sensors and controllers and provide communication with a host computer via a two-wire, high-noise-immunity serial communications network. The two-wire connection keeps the number of cables and connectors to a minimum, simplifies installation, and reduces overall cost. Further, optical isolation at each pod prevents ground loop problems between the computer and the I/O circuits. RIDACS systems consist of pods such as RAG128, RDG-24, etc. and combinations of signal conditioning multiplexers such as AIM-16P and LVDT-8. Typically, one or two of the latter will be used with an RAG128. These are installed in a NEMA4 rated, 14-gauge steel case without any holes or knock-outs except for glands provided for I/O wiring.