Performance Motion Devices Magellan DK58113, User Manual

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Operation
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DK58113 Developer Kit User Manual
2
Figure 2-9:
Main Encoder
Input Circuits
2.8.2 Hall Inputs
The input buffer for the Hall A, B and C signals is shown in Figure 2-10 . This circuit accepts signals in the range of
0 – 24 V and has TTL compatible, Schmitt trigger thresholds. It has a pull-up to 5V to allow direct interfacing to open
collector sources without the need for an external pull-up resistor and an R-C low pass filter to reject noise.
Figure 2-10:
Hall Input
Circuits
The Hall signals are only used with Brushless DC motors. They are used to directly commutate the motor in 6-step
commutation mode or to provide an absolute phase reference for sinusoidal commutation.
2.8.3 Limit and Home Inputs
The input buffer for the end-of-travel Limit and Home signals is shown in Figure 2-11 . This circuit accepts signals in
the range of 0–24 V and has TTL compatible, Schmitt trigger thresholds. It has a pull-up to 5V to allow direct
interfacing to open collector sources without the need for an external pull-up resistor and a 1.3 kHz R-C low pass filter
to reject noise.