Page 54 Non-Sound Decoder MX618 - MX634 and Sound Decoder MX640 - MX648
The MX633P22 has a “complete” PluX connector with 9 function outputs.
The sound decoders MX643 was and the MX645 is available with either 16 or 22-
pin “PluX” connect-
or. Also see chapter 2 (“Technical Information).