maxon EC motor
10 Document ID:: rel8710 EC-i30 IE
Edition: March 2019 Operating Manual
© 2019 maxon motor. Subject to change without prior notice.
3 Functional Description
3.1 Inputs
3.1.1 Set point «Set value speed»
The motor speed is set with the analog input «Set value speed». The input is protected against overvolt-
age up to the maximum operating voltage.
Figure 7 «Set value speed» – Input circuitry
The speed set value is set with the voltage at the set value input. The set speed is controlled by the con-
troller. Changes to speed set value are executed by a delayed internal speed ramp.
A set value smaller a predefined minimum voltage (Table 1) disables the power stage, the motor shaft
coasts.
Table 1 «Set value speed» – Setpoint range
Pin assignment Connection wire «Set value speed», white
Input voltage range 0…+10.1 V (referenced to GND)
Input impedance
101 kΩ (in range of 0…+11.1 V)
68 kΩ (in range of +11.1 V…+V
IN
)
Continuous overvoltage protection −30…+30 V
Nominal design point 10.0 VDC equals 6'000 rpm
Set Value Function Remarks
0.00…0.21 V IDLE mode Motor not engaged or coasts
0.21…0.42 V Operation at minimal speed (250 rpm)
0.42…10.0 V
Linear speed setting between 250 rpm
and 6‘000 rpm
10.0…10.1 V
Linear speed setting between 6‘000 rpm
and 6‘060 rpm
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