Up to 6.3kHz Stepping Rates
Connects to the PC serial port and provides an easy to use interface for connecting and controlling stepper motors by your PC.
You can connect up to four KT-5191 Bipolar Chopper Drive, KT5158 Bipolar Stepper Motor Drivers (See Below) or KT5179 Unipolar Stepper Motor Drivers to the card using their step and direction signals.
You can multidrop up to 4 interface cards off the 1 RS232 serial line so you can control up to a total of 16 stepper motors.

You simply write ascii commands through the PC's serial port to the card to control each of the stepper motors.

Examples of the commands are

@01 AMOV 2000 do an absolute move of stepper 1 to position 2000
@02 RMOV -400 do a relative move of stepper 2 400 steps backwards
@03 POSN 10000 indicate stepper 3 is at position 1000
@04 STOP stop stepper 4
@01 STAT card sends the status of motors 1 to 4 whether they are moving or not and status of limit switches.

Positions can be between -99999999 and 99999999 steps. Stepping rates are now up to 6300Hz, amazing for such a low cost unit.
The user can also set the acceleration and deceleration rates when starting and ending a sequence of steps.
Limit switch inputs are available for each of the motors to prevent motors moving out of range.
Jan 06 - Two new commands can turn on and off a direction signal on the board for a specified time.
For example the user could control two stepper motors for a telescope and using the commands switch on and off a relay for a specified time to operate a camera shutter.
Nov/Dec 06 - Faster Stepping rates, Alternate Acceleration Curve, Saving of parameters to EEPROM, Serial Response on completion of Move and XOR Checksum Options Added

Finished Dimensions (mm): 78Wx88Lx25H

KT-5190A DATA SHEET