Selecting Active Pulse Edge And Control Signal Mode; Connector P2 Configurations; Control Signal Connector (P1) Interface; Connecting The Motor - HELIX DM422 User Manual

Selecting Active Pulse Edge and Control Signal Mode

The DM422 supports PUL/DIR and CW/CCW modes and pulse active at rising or falling edge. See
more information about these settings in Section 13. Default setting is PUL/DIR mode and rising
edge active.

Connector P2 Configurations

Pin Function
+Vdc Power supply, 20~40 VDC, Including voltage fluctuation and EMF voltage.
GND Power Ground.
A+, A- Motor Phase A
B+, B- Motor Phase B

4. Control Signal Connector (P1) Interface

The DM422 uses opto-couplers to increase noise immunity and interface flexibility. If the
opto-couplers' supply voltage is higher than +5V, a current-limiting resistor needs to be connected
at each command signal terminal to prevent overheating the opto-couplers. In the following
figures, connections to open-collector and differential controller are illustrated.
Figure 2: Connections to open-collector signal (common-anode)
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Figure 3: Connections to differential control signal

5. Connecting the Motor

The DM422 can drive any 2-pahse and 4-pahse hybrid stepping motors.

Connections to 4-lead Motors

4 lead motors are the least flexible but easiest to wire. Speed and torque will depend on winding
inductance. In setting the driver output current, multiply the specified phase current by 1.4 to
determine the peak output current.
Figure 4: 4-lead Motor Connections

Connections to 6-lead Motors

Like 8 lead stepping motors, 6 lead motors have two configurations available for high speed or high
torque operation. The higher speed configuration, or half coil, is so described because it uses one half
of the motor's inductor windings. The higher torque configuration, or full coil, uses the full windings
of the phases.

Half Coil Configurations

As previously stated, the half coil configuration uses 50% of the motor phase windings. This gives
lower inductance, hence, lower torque output. Like the parallel connection of 8 lead motor, the torque
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