Due to inherent low resolution of motor mounted hall sensors, using hall sensors for velocity
feedback is not recommended for low speed applications.
Halls wiring should be physically isolated from motor, AC power and all other power wiring.
Analog Halls interface
The Pluto Servo Drive can operate with analog Hall sensors (also known as linear halls) as feedback option.
Signals provided by these sensors are typically 5 V peak-to-peak sinusoidal signals, with 2.5 V offset and a
phase shift of 120 degrees. These sensors can be used for a fine positioning of the rotor. Pluto analog
halls inputs main features are shown in next table:
Specification Value
Type of inputs Non-isolated
Single ended analog filtered
ESD protected
Number of inputs 3
ESD capability IEC 61000-4-2 (ESD) ± 15 kV (air), ± 8 kV (contact)
IEC 61000-4-4 (EFT) 40 A (5/50 ns)
Maximum working
frequency
5 kHz (limited by 2nd order Sallen-key low pass filter at 10 kHz cutoff
frequency)
Voltage range 0 ~ 5 V (10 bits)
Maximum voltage range -0.3 ~ 5.3 V
Input impedance > 24 kΩ
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