8
8.
Wiring Notes
l
In order to improve anti-interference performance of the driver, it is recommended to use twisted pair shield cable.
l
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.
l
If a power supply serves several drivers, separately connecting the drivers is recommended instead of daisy-
chaining.
l
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.
Figure 10: Typical connection
Controller
DM860
VCC = 5V
270O
VCC
PUL+
Pulse
270O
Direction
ENA+
270O
ENA-
Enable
Motor
A-
B-
Recommended Power Supply
24 ~ 68VDC
VDC
GND
PUL-
