DM503 Fully Digital Stepper Drive Manual V1.0
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8. Wiring Notes
In order to improve anti-interference performance of the driver, it is recommended to use twisted pair shield cable.
To prevent noise incurred in PUL/DIR signal, pulse/direction signal wires and motor wires should not be tied up
together. It is suggested to leave by at least 10 cm (4 inches) from another stepper drive in multi-axis applications.
Otherwise, the disturbing signals generated by a motor could affect pulse direction signals, thus cause motor
position error, system instability and other failures.
If several more than one stepper drives share the same power supply, separate connection for the drivers is
recommended instead of daisy-chaining connection.
It is prohibited to pull and plug connector P2 while the driver is powered ON due to the high current flowing in
motor coils (even when motor is at standstill). Pulling or plugging connector P2 with power on will result in
extremely high back-EMF voltage, which may damage the DM503 stepper drive.
9. Typical Connection
A complete stepping system should include stepping motor, stepping driver, power supply and controller (pulse
generator). A typical connection is shown as figure 10.
Figure 10: Typical connection
