I am reworking an DC conveyor that is using selsyn to do synchronization. The selsyn gives me a position error signal (0 to 90V AC proportional to the difference in position between the signal selsyn-master- and the differential selsyn-slave-) It is pretty old technology but it is installed and has been running for years so my customer does not want to change it. I need to use that error signal to regulate my drive speed (trim). My drive analog input use +/-10 VDC signal. How can I convert that 0-90VAc to +/-10 VDC. I know AB use to make a "Reflex demodulator" (12M03-00103-01) but it seems that they do not offer it anymore. Any idea?