user manual

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
or active low
System Safety
Watchdog 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/O
Encoder inputs........................................ Quadrature, incremental,
single-ended
Max count rate ................................ 20 MHz