Introduction The d2hb542ma is an economical microstepping driver based on patented technology of longs motor.It is suitable for driving 2-phase 4-phase hybrid stepping motors .By using the advanced bipolar constant-current shopping technique , it can output more speed and torque from the same motor, compared with traditional drivers , such as l/r drivers .Its 3-state current control technology allows coil currents to be well controlled and with relatively small current ripple, therefore less motor heating is achieved. Features Low cost and good high-speed torque Supply voltage up to +45vdc Output current up to 5.86a Optically isolated input signals Automatic idle-current reduction 14 selectable resolutions Suitable for-2-phase and 4-phase motors Dip switch current setting 8 different values Pulse frequency up to 200khz Dip switch current setting 8 different values Small size (122.2*90*33), weight:0.3kg