A06B-0502-B204 Fanuc AC Model 20S Servo Motor. On the name plate for this A06B-0502-B204 motor are: 23Nm TRQ, 20 Amp, 3 phase 146V, 2000RPM motor with straight shaft and BRAKE, keyed or not keyed, with normal Fanuc seals or special waterproof seals and any combination off. This A06B-0502-B204 motor from the Fanuc 20S Series AC motor range is fitted with a 2000 RPM red incremental pulse coder which is available either as exchange, outright surplus, repair, and testing services.- other Fanuc S Series Servo Motors - Other Model 20S motors. NEW 20SB MOTORS IN STOCK.