National Instruments 7344 Series User Manual page 45

System Safety
Motion I/O
© National Instruments Corporation
Voltage range .................................. 0 to 5 V
Output low voltage .................. < 0.6 V at 64 mA sink
Output high voltage ................. Open collector with built-in
Polarity............................................ Programmable, active-high
Watchdog timer function ....................... Resets board to startup state
Watchdog timeout........................... 63 ms
Shutdown input
Voltage range .................................. 0 to 12 V
Input low voltage ..................... 0.8 V
Input high voltage .................... 2 V
Polarity..................................... Rising edge
Control ............................................ Disable all axes and
Encoder inputs........................................ Quadrature, incremental,
Max count rate ................................ 20 MHz
Min pulse width .............................. Programmable; depends
Voltage range .................................. 0 to 12 V
Input low voltage ..................... 0.8 V
Input high voltage .................... 2 V
Min index pulse width .................... 60 ns
Forward, reverse, and home inputs
Number of inputs ............................ 12 (3 per axis)
Voltage range .................................. 0 to 12 V
Input low voltage ..................... 0.8 V
Input high voltage .................... 2 V
Polarity............................................ Programmable, active-high
3.3 kΩ pull-up to +5 V
or active-low
command outputs
single-ended
on digital filter settings
or active-low
A-3
Appendix A Specifications
7344/7334 Hardware User Manual