Completed in 1975, the CR5 was our first data acquisition system. It was also our first modular data logger; modules needed for the application could be order while excluding other capabilities. This tradition has been continued on in our CR7 and CR9000X systems. Due to age and a lack of parts in this technological vintage, repairs are no longer available.
A practical maximum is to connect one multiplexer per every two control terminals on the data logger. Control terminals can be shared between multiplexers to increase the number of connected multiplexers. Sharing terminals, however, requires more complex wiring and programming. Users who would like to connect more than one multiplexer per every two control terminals are advised to contact a sales or support engineer at Campbell Scientific for assistance.