User Manual

TMCM-1260 Hardware Manual • Hardware Version V1.10 | Document Revision V1.20 • 2018-05-17
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4.2 Motor Connector
Two four pin motor connectors are available. Either of them can be used for connecting a bipolar stepper
motor. Both connectors are connected to the same driver stage therefore, just one connector should
be used at the same time. While the more compact 4pin JST EH series connector is suitable for motor
currents up-to 3A RMS the larger JST VH series connector is able to support all motor current up-to 6A
RMS (limit of the unit).
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
3 A1 out Pin 1 of motor coil A
4 A2 out Pin 2 of motor coil A
Table 5: Motor Connector Pin Assignment
NOTICE
Connect just one motor connector at the same time! Both connectors are
connected to the same driver stage.
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
Do not mix-up power supply connector and the larger motor connector!
4.3 RS485 + CAN Connector
For serial communication the TMCM-1260 offers selection between RS485, CAN and USB interfaces. While
the USB interface is available for configuration and service of the board, mainly (e.g. parameter settings,
firmware updates) a 5-pin JST PH series connector offers 2-wire RS485 and CAN interfaces for in system
communication.
NOTICE
Due to hardware ressource sharing USB and CAN communication interfaces are
not available at the same time. As soon as USB is physically attached to a host or
hub the CAN interface will be switched off.
RS485 + CAN Connector Pin Assignment
Pin Label Direction Description
1 GND Power (GND) Common system supply and signal ground
2 RS485+ Bidirectional RS485 interface, diff. signal (non-inverting)
3 RS485- Bidirectional RS485 interface, diff. signal (inverting)
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