DM4050tm Stepper Motor Driver
Microstepping, 40V 5A



  • DIP switch selectable full-step, half-step, quarter-step or eighth-step resolutions
  • Equalized half-step mode for smooth operation
  • Over-current and short-circuit protection
  • Easy screw terminal hookup
  • Switch selectable current levels
  • Bipolar chopper circuit provides the highest performance
  • Optoisolated step & direction inputs
  • Optoisolated Fault and Home signal outputs
  • Current cutback (50% current after ½ second of idle when enabled)
DM4050 Photo

The DM4050tm microstepping driver is a 40 volt, 5 Amp per phase stepper motor driver providing 400 watts of power in a compact package. The DM4050tm is suitable to drive NEMA size 23 and 34 motors typically used in engravers, wood routers and many types of automated machinery. The DM4050 driver can be used in conjunction with our OptiStep Plus, MN100 or MN400 motion controllers or with any controller capable of producing TTL compatible step and direction signals.


Drive circuit

Constant current bipolar chopper

Chopping rate

21 KHz nominal

Operating voltage range

20 ~ 40 VDC

Output Current

0.5 - 5.0 Amps in 0.3 A increments

Stepping Modes

Full/Half/Quarter/Eighth step

Current cutback

50 % of full current when enabled

Step input signal

TTL compatible positive edge trigger

Direction input signal

TTL compatible

Fault and Home output signals

Open collector (50 mA max sink)

Motor control outputs

4 current mode chopper lines

Current capability

5.0 amps per phase continuous

Physical dimensions

4.15" × 3.00" × 0.75"(add 0.60" for standoffs)

Working temperature range

32° F ~ 158° F (0° C ~ 70° C)


5 years parts & labor

DM4050 Block Diagram


DM4050 Typical Application


DM4050 Mechanical Outline