SDM-44140 (-D4140)
Description
The SDM-44140 resides inside the DMC-40x0 enclosure and contains four microstepping drives for operating two-
phase bipolar stepper motors. The drives produce 64 microsteps per full step which results in 12,800 steps/rev for a
standard 200-step motor. The maximum step rate generated by the controller is 6,000,000 microsteps/second. The
SDM-44140 drives motors operating at up to 3 Amps at 20 to 60 VDC (available voltage at motor is 10% less). There
are four software selectable current settings: 0.5 A, 1 A, 2 A and 3 A. Plus, a selectable low current mode reduces
the current by 75% when the motor is not in motion. No external heatsink is required.
WARNING
Do not “hot swap” the motor power or supply voltage power input connections. If the amplifier is
enabled when the motor connector is connected or disconnected, damage to the amplifier can
occur. Galil recommends powering the controller and amplifier down before changing the connector,
and breaking the AC side of the power supply connection in order to power down the amplifier.
Chapter 5 Integrated Components ▫ 34
DMC-40x0 UL Installation Manual