We stock Mitsubishi MELSEC-A. This is a modular PLC system that in addition to digital I/O modules the Mitsubishi AnS also offers analog I/O modules, modules for temperature measurement and temperature control, counters, positioning modules and a large number of various communication modules. All CPUs have built in RAM where the PLC program can be stored. As extra protection an EPROM memory cassette can be used. These come with a backup battery that protects the memory in case of a power failure. When you purchase a Mitsubishi A memory cassette from us a new backup battery is always included. The system is phased out but we can offer used/refurbished Mitsubishi AnS spare parts from our stock.