NI SMD-7611/7612 User Manual
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© National Instruments
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41
Figure 69.
Mechanical Dimensions (Side View)
Technical Specifications
Amplifier
Features..................................................... Digital MOSFET. 20kHz PWM. Suitable for
driving two phase and four phase step motors
with four, six, or eight leads.
SMD-7611
Supply voltage .................................. 12-48 VDC
Under voltage alarm ......................... 20 VDC
Over voltage shutdown..................... 60 VDC
Motor current.................................... 1.12 to 4.5 A/phase peak of sine, with rotary
switch set to position 7 and current at 70%
SMD-7612
Supply voltage .................................. 24-60 VDC
Under voltage alarm ......................... 20 VDC
Over voltage shutdown..................... 85 VDC
Motor current.................................... 2.35 to 8 A/phase peak of sine, with rotary
switch set to position 7 and current at 70%
Digital Inputs
Isolation .................................................... Optically isolated, 5 to 24 V logic
Digital logic levels.................................... Minimum ON: 4 VDC
Maximum: 30 VDC
Input current ............................................. 5 mA typical at 4 VDC
15 mA typical at 30 VDC
Maximum pulse frequency ....................... 150 kHz or 2 MHz (set by internal jumper)
Minimum pulse width............................... 3
μ
sec at 150 kHz setting
0.25
μ
sec at 2 MHz setting
Fault output....................................................... Photodarlington, 80 mA, 30 VDC max.
Voltage drop.............................................. 1.2 V max at 80 mA
Dimensions ....................................................... 1.3 × 3.0 × 4.65 inches (33 × 75.5 × 118 mm)
2.97”
(75.5 mm)
1.
3
0
”
(
33
mm)