maxon motor
10
maxon EC motor
EC 20 flat with integrated electronics
Operating Instructions
September 2010 Edition / document number 903155_PDF_E - 07 / subject to change
4 Description function of inputs and outputs 5-wire version
4.1 Set value speed input
Motor speed is set with an analog voltage at the set value speed input.
The set value speed input is protected against overvoltage.
Pin allocation
Cable white
Input voltage range
0 ... +10.8 V (based on GND)
Input impedance
62 k
W
(range 0 ... +21.9 V)
47 k
W
(range 21.9 V... +30 V)
Continuous overvoltage protection
-30 V ... +30 V
47k
15k
1µ
F
white
set value speed
12k
100k
grey
6’000
0
0
200
10.0
0.17 0.33
3’000
5
10.8
6’480
7’000
Speed
[rpm]
0
0
28
2’500
10
6’000
24
Enable
3’500
0
0
28
1’250
10
3’000
24
Operating voltage [V]
Speed
[rpm]
Operating voltage [V]
Speed
[rpm]
Operating voltage [V]
12k
100k
grey
Direction «cw/ccw»
Picture 15: Wiring set value speed
The speed set value is set with the voltage at the speed set value input. The
set speed is controlled by the amplifier. Changes to speed set value are re-
stricted by the maximum acceleration (see section 2.4).
To activate the output stage in the «enable» version, the voltage at the enable
input must be higher than 2.4 V, while the speed set value must be above
0.17 V.
With the «cw/ccw» direction pre-selection version, the output stage is activa-
ted when the speed set value is higher 0.17 V.
Set value input area
Function
Comments
0 V … 0.17 V
«Disable»
Power stage switched off.
0.17 V … 0.33 V
Operation at minimum speed
(200 rpm)
If «enable» higher than 2.4 V for version
«Enable».
0.33 V … 10.8 V
Linear speed setting between
200 rpm and 6480 rpm
f
n
V
n
10
10
600
Monitor n
actual
actual
Monitor n
target
target
$
=
=
=
If «enable» higher than 2.4 V. In speed
range between 200 rpm and 300 rpm,
control accuracy of the speed controller
is restricted. The speed can vary from
the specified set value depending on the
load and supply voltage.
V
target
= Set value voltage
n
target
=
Desired speed
