DMA860H Stepper Driver

Description The DMA860H is a digital stepper drive with simple design and easy setup. By implementing Leadshine advanced stepper control technology, this stepper drive is able to power 2-phase and 4 phase stepper motors smoothly with optimal torque and low motor heating & noise. Its operating voltage is 18-80VAC or 24-110VDC and it can output up to 7.2A current. All the micro step and output current are done via DIP switches. Therefore, the DMA860H are ideal choices for applications requiring simple step & direction control of NEMA 23, 24, 34, and 42 stepper motors. Features Anti-Resonance for optimal torque, smooth motion, low motor heating and noise Motor auto-identification and parameter auto-configuration for optimal torque from wide-range motors Step & direction (PUL/DIR) and CW/CCW (via internal jumper set) control. Step & direction by default Multi-Stepping for smooth motor movement Opto Isolation for input control signals Input voltage 18-80VAC or 24-110VDC 16 selectable micro-step resolutions of 400-51,200 via DIP switches 8 selectable output current settings of 2.4 – 7.2A via DIP switches Soft-start with no “jump” when powered on Pulse input frequency up to 200 KHz. TTL compatible and optically isolated inputs Automatic idle-current reduction Protections for over-voltage and over-current Specification Parameters DMA860H Min Typical Max Unit Output current 2.4 - 7.2 A Supply voltage 18 24 36 - 70 50 - 90 80 110 VAC VDC Logic signal current 7 10 16 mA Pulse input frequency 0 - 200 kHz Minimal Pulse Width 2.5 - - μS Minimal Direction Setup 5.0 - - μS Isolation resistance 500 -   Mohm   Connectors   Pin Function Details PUL Pulse signal: Pulse active at rising edge; 4-5V when PUL-HIGH, 0-0.5V when PUL-LOW. Minimal pulse width of 2.5μs. Add a resistor for current-limiting at +12V or +24V input logic voltage (1K for +12V, 2k for +24V). The same as DIR and ENA signals. DIR DIR signal: This signal has low/high voltage levels to represent two directions of motor rotation. 4-5V when DIR-HIGH, 0-0.5V when DIR-LOW. Minimal direction setup time of 5μs. Swapping the connection of two wires of a coil (e.g. A+ and A-) to the drive will reverse motor direction. ENA Enable signal: This signal is used for enabling/disabling the drive. High level +5V (NPN control signal) for enabling the drive and low level for disabling the drive. PNP and Differential control signals are on the contrary, namely Low level for enabling. By default it is left UNCONNECTED (ENABLED).. Connector P2 Configurations Pin Function Details A+, A- Motor Phase A connections. Connect motor A+ wire to A+ Pin; motor A- wire to A B+, B- Motor Phase B connections. Connect motor B+ wire to B+ Pin; motor B- wire to B AC Power supply input 18~80VAC or 24-110 VDC; No polarity AC     Microstep & Current Microstep resolution is set by SW5, 6, 7, 8 of the DIP switches as shown in the following table:   Microstep  Steps/rev.(for 1.8o motor) SW5 SW6 SW5 SW6 2 400 ON ON ON ON 4 800 OFF ON ON ON 8 1600 ON OFF ON ON 16 3200 OFF OFF ON ON 32 6400 ON ON OFF ON 64 12800 OFF ON OFF ON 128 25600 ON OFF OFF ON 256 51200 OFF OFF OFF OFF 5 1000 ON ON ON OFF 10 2000 OFF ON ON OFF 20 4000 ON OFF ON OFF 25 5000 OFF OFF ON OFF 40 8000 ON ON OFF OFF 50 10000 OFF ON OFF OFF 100 20000 ON OFF OFF OFF 200 40000 OFF OFF OFF OFF               Current Settings  For a given motor, higher drive current will make the motor to output more torque, but at the same time causes more heating in the motor and drive. Therefore, output current is generally set to be such that the motor will not overheat for long time operation. Since parallel and serial connections of motor coils will significantly change resulting inductance and resistance, it is therefore important to set drive output current depending on motor phase current, motor leads and connection methods. Phase current rating supplied by motor manufacturer is important in selecting drive current, however the selection also depends on leads and connections. The first three bits (SW1, 2, 3) of the DIP switch are used to set the dynamic current. Select a setting closest to your motor’s required current.   Peak Current  RMS Current SW1 SW2 SW3 2.40A 1.70A ON ON ON 3.08A 2.18A OFF ON ON 3.77A 2.67A ON OFF ON 4.45A 3.15A OFF OFF ON 5.14A 3.64A ON ON OFF 5.83A 4.12A OFF ON OFF 6.52A 4.61A ON OFF OFF 7.20A 5.09A OFF OFF OFF   Notes: Due to motor inductance, the actual current in the coil may be smaller than the dynamic current setting, particularly under high speed condition.