User Manual

PD42-x-1241 Hardware Manual • Hardware Version V1.00 | Document Revision V1.23 • 2019-JAN-02
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4.1 Power Supply Input Connector
The PD42-x-1241 offers one 4pin JST PH series power supply input connector. In addition to main power
supply input and related ground connection this connector offers a separate logic supply input with the
option to keep the on-board logic alive while the driver stage is switched off. It is not necesary to connect
the logic supply input in case separate supplies are not required as the main power supply input will
always supply power to the driver stage and the logic part.
The power supply input connector offers a driver enable input. This input has to be connected to any
voltage above 3.5V up-to max. supply voltage of 30V in order to enable the driver stage. Leaving this pin
unconnected or connected to ground (voltage below 2.4V) will disable the driver stage regardless of any
settings in software. This input may be connected to main power supply input permanently in case an
enable input in hardware is not required.
Power Supply Connector Pin Assigment
Pin Label Direction Description
1 GND Power (GND) Common system supply and signal ground
2 V
MAIN
Power (input) Main power supply input for the driver and on-board logic
10. . . 30V
3 Enable Digital input Driver enable input. A voltage above 3.5V is required here
in order to enable the on-board stepper motor driver. This
input maybe connected to main power supply input in order
to enable the driver stage (+24V tolerant input).
4 V
LOGIC
Power (input) Optional separate power supply input for the on-board logic
10. . . 30V
Table 5: Power Supply Connector Pin Assignment
NOTICE
Do not connect or disconnect motor during operation! Motor cable and mo-
tor inductivity might lead to voltage spikes when the motor is (dis)connected
while energized. These voltage spikes might exceed voltage limits of the driver
MOSFETs and might permanently damage them. Therefore, always switch off
/ disconnect power supply or at least disable driver stage before connecting /
disconnecting motor.
NOTICE
Take care of polarity, wrong polarity can destroy the board!
NOTICE
Connect Enable pin to voltage >3.5V in order to enable motor movements!
4.2 Motor Connector
A second 4pin JST PH series connector is available for connection of a 2-phase bipolar stepper motor.
Motor Connector Pin Assignment
Pin Label Direction Description
1 B1 out Pin 1 of motor coil B
2 B2 out Pin 2 of motor coil B
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