Data Sheet

Digital Stepper Drive DM320T
3
3. Connection Pin Assignments and LED Indication
The DM320T has two connector blocks P1&P2 (see above picture). P1 is for control signals connections, and P2 is for
power and motor connections. The following tables are brief descriptions of the two connectors. More detailed
descriptions of the pins and related issues are presented in section 4, 5, 9.
3.1 Connector P1 Configurations
Pin Function
Details
PUL
Pulse signal: Pulse active at rising edge; 4-5V when PUL-HIGH, 0-0.5V when PUL-LOW. Minimal
pulse width of 2.5μs. Add a resistor for current-limiting at +12V or +24V input logic voltage (1K
for +12V, 2k for +24V). The same as DIR and ENA signals.
DIR
DIR signal: This signal has low/high voltage levels to represent two directions of motor
rotation.. Minimal direction setup time of 5μs. Also swapping the connection of two wires of a
coil (e.g. A+ and A-) to the drive will reverse motor direction.
OPTO
Opto-coupler power supply, and the typical voltage is +5V. Series connect resistors (at the PUL,
DIR, ENA terminals) for current-limiting when +12V or +24V used.
ENA
Enable signal: This signal is used for enabling/disabling the drive. High level +5V (NPN control
signal) for enabling the drive and low level for disabling the drive. PNP and Differential control
signals are on the contrary, namely Low level for enabling. By default it is left
UNCONNECTED (ENABLED).
!
Notice
Notes: (1) shielding control signal wires is suggested; (2) To avoid interference, don’t tie PUL/DIR control
signal and motor wires together
3.2 Connector P2 Configurations
Pin Function
Details
GND
Power supply ground connection.
+Vdc
Power supply positive connection. Suggest 24VDC power supply voltage
A+, A-
Motor Phase A connections. Connect motor A+ wire to A+ Pin; motor A- wire to A-
B+, B-
Motor Phase B connections. Connect motor B+ wire to B+ Pin; motor B- wire to B-