AKT2G-SM-L15 General Connection Examples


  • Risk of injury through electric shock and damage to the device!

    Bring the Bus Terminal system into a safe, de-energized state before starting mounting, disassembly or wiring of the Bus Terminals.


  • Connect the motor strands correctly!

    Connect the windings of a motor strand only to the terminal points of the same output driver of the stepper motor terminal, e.g.:

    • one motor strand to terminal points A1 and A2,
    • the other motor strand to terminal points B1 and B2.

    Connecting a motor strand to the terminal points of different output drivers (e.g. to A1 and B1) can lead to destruction of the output drivers of stepper motor terminal!

Connection types

The AKT2G-SM-L15 Stepper Motor terminal has bipolar output stages and can control bipolar and unipolar motors.


  • Fuse protection of the supply voltage

    The electrical protection of the load voltage must be selected in such a way that the maximum flowing current is limited to 3 times the rated current (max. 1 second)!

Bipolar motors

Figure 1: Bipolar control (serial) of a bipolar motor

Figure 2: Bipolar control (parallel) of a bipolar motor

Unipolar motors

Figure 3: Bipolar control of a unipolar motor. Only one half of each winding is controlled.