The TFC-7050A is a device that detects the speed by taking the slip frequency on the secondary side 3 of the wire-wound motor as input.

The speed detection method is precisely calculated digitally using the MCU after removing the noise with a filter.

The display is displayed as a percentage of the motor synchronous speed in 7-segment. When the motor rotates at the synchronous speed, it is displayed as 100, and when the motor rotates in reverse, the first 7-segment displays (-).

The motor speed detector is an electronic speed detector that uses the RS-422 communication with the FDA-Series, a wire-wound motor controller, to send and receive speed information and replace it as a conventional tacho-generator.