Delta Tau Power PMAC Clipper, Руководство пользователя

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Power PMAC Clipper User Manual
Connections and Software Setup
26
Note
Use an encoder cable with high quality shield.
The standard encoder inputs on the Power PMAC Clipper are designed for differential quadrature type
signals.
Quadrature encoders provide two digital signals to determine the position of the motor. Each nominally
with 50% duty cycle, and nominally 1/4 cycle apart. This format provides four distinct states per cycle of
the signal, or per line of the encoder. The phase difference of the two signals permits the decoding
electronics to discern the direction of travel, which would not be possible with a single signal.
Channel A
Channel B
Typically, these signals are 5V TTL/CMOS level whether they are single-ended or differential.
Differential signals can enhance noise immunity by providing common mode noise rejection. Modern
design standards virtually mandate their use in industrial systems.