DM556T Digital Stepper Drive User Manual
5
3.3 LED Light Indication
There are two LED lights for DM556T. The GREEN one is the power indicator which will be always on generally. The
RED one is a protection indicator which will flash 1-2 times in a 3-second period, when protection enabled for a
DM556T. Different number of flashes indicates different protection type (read section 11 for detail).
4. Control Signal Connector (P1) Interface
The DM556T can accept differential and single-ended inputs (including open-collector and PNP output). The DM556T
has 3 optically isolated logic inputs which are located on connector P1 to accept line drive control signals. These
inputs are isolated to minimize or eliminate electrical noises coupled with the drive control signals. Recommend using
line drive control signals to increase noise immunity for the drive in interference environments. In the following
figures, connections to open-collector and PNP signals are illustrated.
Figure 2: Connections to open-collector signal Figure 3: Connections to PNP signal
(common-anode)
(common-cathode)
5. Motor Connection
The DM556T can drive 2-phase and 4-pahse bipolar hybrid stepper motors with 4, 6, or 8 wires.
5.1 Connections of 4-lead Motor
The 4 lead motors are the least flexible and easy to connect. And the Speed – torque of motor depends on winding
inductance. The output current from drive that is multiply the specified phase current by 1.4 to determine the peak
output current.
Figure 4: 4-lead Motor Connections
5.2 Connections of 6-lead Motor
Like 8 lead stepping motors, 6 lead motors have two configurations available for high speed or high torque operations.
The higher speed configuration, or half coil, is described, because it uses one half of the motor’s inductor windings.
The higher torque configuration, or full coil, uses the full coil windings.
Drive
Controller
VCC
PUL-
PUL+
ENA-
PUL
DIR
ENABLE
DIR-
DIR+
ENA+
Drive
Controller
VCC
PUL-
PUL+
ENA-
PUL
DIR
ENABLE
DIR-
DIR+
ENA+
