Built-in vs. Remote Decoder
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Usually, resolver-to-digital decoders are housed in a separate enclosure, but resolvers with built-in decoders are also avail-able. The units with decoder circuitry packaged inside a resolver-housing combine the ruggedness of a resolver with simplicity of an optical encoder. However, due to the electronics present in the same housing, the operating temperature range is considerably reduced as compared to a resolver with separate decoder. The foregoing discussion is helpful in determining as to what type of transducer will be suitable for a particular application.

But before one can finalize a transducer selection, one needs to obtain additional mechanical and electrical requirements of the system. Mechanical parameters to be determined are housing size, shaft size and loading requirements, mounting style, NEMA or explosion proof rating needed and system resolution. Electrical requirements are the power supply voltage and cur-rent, output type (TTL, CMOS, sinking, sourcing, etc), Analog or Digital outputs, output format (BCD, Binary, or Grey) etc.