DM860 Fully Digital Stepper Drive Manual V1.0
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8. Wiring Notes
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In order to improve anti-interference performance of the driver, it is recommended to use twisted pair shield cable.
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To prevent noise incurred in PUL/DIR signal, pulse/direction signal wires and motor wires should not be tied up
together. It is better to separate them by at least 10 cm, otherwise the disturbing signals generated by motor will
easily disturb pulse direction signals, causing motor position error, system instability and other failures.
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If a power supply serves several drivers, separately connecting the drivers is recommended instead of
daisy-chaining.
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It is prohibited to pull and plug connector P2 while the driver is powered ON, because there is high current
flowing through motor coils (even when motor is at standstill). Pulling or plugging connector P2 with power on
will cause extremely high back-EMF voltage surge, which may damage the driver.
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.
DM860
DIR+
Controller
VCC
PUL-
270O
270O
270O
PUL+
ENA-
Pulse
Direction
Enable
DIR-
ENA+
VDC
GND
Recommended Power Supply
24 ~ 68VDC
VCC = 5V
A+
A-
B+
B-
Stepper
Motor
Figure 10: Typical connection
