There are many CPU models in the MicroNet digital control series, and this specific model 5466-409 is a Pentium CPU. Typically, models in the MicroNet series can operate in redundant or simplex mode, but this module can only run in simplex systems and will be installed in the expansion rack of the chassis. When the Pentium CPU is located in the expansion rack, it must be used together with the main transceiver (XCVR) and remote XCVR. Related recommendations: 5466-318 5466-1000 5466-017 5466-258 5466-419 5466-3321 5466-1001 5466-409 5466-355 5466-256 more……