User Manual

PD28-1-1021 / PD28-3-1021 V1.4 Hardware Manual (Rev. 1.03 / 2018-JAN-25) 17
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3.4.2 Motor Connector
A 4-pin, 2mm pitch single row connector is used for connecting the four motor wires to the electronics.
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 3.4 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 TMCM-1021 hardware version 1.4: please note the additional high current range
for motor currents up-to 1.4A 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 1.4 the low current range is set as
default. Do not use the high current range with the PD28-1-1021 and PD28-3-1021
PANdrives for prolonged time!
PD28-1-1021
PD28-3-1021
QSH2818-32-07-006
QSH2818-51-07-012
Motor connector pin
Cable colour
Coil
Description
1
Blue
B-
Motor coil B pin 2
2
Red
B
Motor coil B pin 1
3
Green
A-
Motor coil A pin 2
4
Black
A
Motor coil A pin 1
M
black
green
red
blue
A
B