TMCM-1141 Hardware Manual (Rev. 1.06 / 2015-JAN-09)
16
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3.2.5
Motor Connector
As motor connector a 4pin 2mm pitch single row connector is available. The motor connector is used for connecting
the four motor wires of the two motor coils of the bipolar stepper motor to the electronics.
4
1
Pin
Label
Direction
Description
1
OB2
Output
Pin 2 of motor coil B
2
OB1
Output
Pin 1 of motor coil B
3
OA2
Output
Pin 2 of motor coil A
4
OA1
Output
Pin 1 of motor coil A
Table 3.7 Motor connector
Do not connect or disconnect motor during operation!
Motor cable and motor inductivity might lead to voltage spikes when the motor is disconnected /
connected while energized. These voltage spikes might exceed voltage limits of the driver
MOSFETs and might permanently damage them. Therefore, always disconnect power supply
before connecting / disconnecting the motor.
For hardware version 1.3: please note the additional high current range for motor currents up-
to 2A RMS!
Setting motor current too high might lead to excessive power dissipation inside the motor,
overheating and even permanent damage of the motor. Therefore, make sure the motor current
is properly set. Also with hardware version 1.3 the low current range is set as default.
M
A
black
green
B
b
lu
e
re
d
TMCM-1141
QS4218 Motor
Motor connector pin
Cable color
Coil
Description
1
Red
B
Motor coil B pin 1
2
Blue
B-
Motor coil B pin 2
3
Green
A-
Motor coil A pin 2
4
Black
A
Motor coil A pin 1