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The Tern MotionC-S is another variant of the MotionC board. It is designed primarily to support brushless motor servo control with sinusoidal waveforms.

The MCS2340 uses incremental quadrature encoders for position feedback, as well as 8 channels of high speed 12-bit DAC to generate +-10V phase shifted commutation sinusoidal waveforms. Each axis outputs three pulses or two voltage waveforms. The three pulses are PWM pulses with 120 degrees of phase shift. The two voltage waveforms are commutation DAC sinusoidal voltage waveforms with 120 degrees of phase shift. Programmable phase count, algorithmic or Hall-Sensor based commutation initialization, commutation angle adjusting, index pulse reference are all supported.

The MCS provides protected inputs, up to 24V, for home switches, line switches, and fault switches on each axis. The MCS also supports other PMD chip sets: MCS2540 (stepper) , and MCS2140 (DC servo).

Includes:
4-axis control DSP chipset
Solenoid drivers
24 I/Os
2 RS232
DAC