National Instruments NI 951x, Руководство пользователя, Страница: 58 / 79

Appendix A Specifications
NI 951x User Manual A-2 ni.com
Digital logic levels, differential (Step/Dir(+) – Step/Dir(–))
At 20 mA ..................................±1 V min
At 12 mA ..................................±1.5 V min
At 4 mA....................................±2 V min
Max pulse rate .................................5 MHz
Continuous output current
on each channel ...............................±20 mA
Pulse width ......................................Approximately 50% of the period,
up to 6.4
μ
s max
Output mode ....................................Programmable: step and
direction, or CW/CCW
Active state ......................................Programmable: high or low
Servo command analog outputs
Voltage range...................................±10 V, relative to
Drive Command COM
Resolution........................................16 bits (0.000305 V/LSB),
monotonic
Max output current ..........................±2 mA
Drive enable output
Output type ......................................Programmable: sinking or
sourcing
Voltage range................................... 0 to 30 V
V
sup
input .........................................19 to 30 V
Continuous output current ( I
0
)
on each channel ...............................±100 mA max
Output impedance ( R
0
) ....................0.3
Ω
max
Output voltage ( V
0
) sourcing ...........V
sup
– ( I
0
R
0
)
Output voltage ( V
0
) sinking .............I
0
R
0
Min output pulse width....................100
μ
s
Active state ......................................Programmable: on or off