Appendix A Specifications
© National Instruments Corporation A-3 NI 7350 User Manual
S-curve time range..........................1 to 32,767 samples
Following error range..................... 0 to 32,767 counts
Gear ratio........................................ ±32,767:1 to ±1:32,767
Stepper outputs
Max pulse rate.................................8 MHz (full, half, and microstep)
Max pulse width..............................6.5 μs at <40 kHz
Min pulse width.............................. 40 ns at >4 MHz
Step output mode............................ Step and direction or CW/CCW
Voltage range..................................0 to 5 V
Output low voltage.................. 0.6 V at 64 mA sink
Output high voltage................. Totem Pole: 2V at 16 mA source;
open collector: built-in 3.3 kΩ
pull-up to +5 V
Polarity............................................Programmable, active high
oractive low
System SafetyWatchdog timer function....................... Resets board to startup state
Watchdog timeout........................... 63 or 256 ms, programmable
Shutdown input
Voltage range..................................0 to 5 V
Input low voltage..................... 0.8 V
Input high voltage....................2 V
Built-in pull-up resistor...................3.3 kΩ to +5 V
Polarity............................................Rising edge
Control............................................ Disable all axes and
command outputs; resets I/O
to default states
Host +5 V max current
sourced from controller..........................100 mA at 5 V
Motion I/OEncoder inputs........................................Quadrature, incremental,
single-ended
Max count rate................................ 20 MHz