USER MANUAL
NI SMD-7611/7612
This manual contains information about the configuration and use of the National Instruments
SMD-7611 and SMD-7612. They are referred to inclusively as the NI SMD-7611/7612.
Functionality on these devices are roughly equivalent. The NI SMD-7611 operates from 24 to
48 VDC, and has a running current of up to 4.5 A per phase. The SMD-7612 operates from 24 to
60 VDC, and runs current up to 7.8 A per phase.
Contents
Safety Information.................................................................................................................... 2
Block Diagram.......................................................................................................................... 3
Getting Started.......................................................................................................................... 3
Mounting the Drive .................................................................................................................. 4
Connecting the Power Supply .................................................................................................. 4
Drive CE Requirements............................................................................................................ 5
Choosing a Power Supply......................................................................................................... 5
Voltage.............................................................................................................................. 6
Current .............................................................................................................................. 6
Regeneration..................................................................................................................... 8
Connecting Motors ........................................................................................................... 8
Connecting Input Signals.................................................................................................. 10
FAULT Output ......................................................................................................................... 13
Configuring the Drive............................................................................................................... 14
Step 1: Selecting a Motor and Setting the Current ........................................................... 14
Step 2: Fine Tuning the Motor Current ............................................................................ 16
Step 3: Setting Idle Current .............................................................................................. 17
Step 4: Load Inertia .......................................................................................................... 17
Step 5: Step Size ............................................................................................................... 18
Step 6: Step Pulse Type .................................................................................................... 19
Step 7: Step Pulse Noise Filter ......................................................................................... 20
Step 8: Self Test................................................................................................................ 21
Torque Speed Curves................................................................................................................ 21
Motor Heating........................................................................................................................... 28
Drive Heating ........................................................................................................................... 39
Mechanical Outline................................................................................................................... 40
Technical Specifications........................................................................................................... 41
Alarm Codes ............................................................................................................................. 42
