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USER MANUAL
NI ISM-7401/7402
Integrated Stepper
This manual describes the NI ISM-7401 and the NI ISM-7402 integrated steppers. It describes
electrical and mechanical characteristics of the devices, as well as I/O functionality.
Contents
Getting Started.......................................................................................................................... 2
Mounting the NI ISM-7401/7402............................................................................................. 3
Connecting the Power Supply .................................................................................................. 4
Choosing a Power Supply......................................................................................................... 4
Voltage.............................................................................................................................. 4
Current .............................................................................................................................. 5
Connecting Input Signals.......................................................................................................... 8
Connection Examples: STEP & DIR................................................................................ 9
Connection Examples: EN................................................................................................ 9
Connecting the Digital Output.................................................................................................. 10
Using the Optional Encoder ..................................................................................................... 12
Configuring the NI ISM-7401/7402 ......................................................................................... 12
Setting the Current............................................................................................................ 12
Setting Idle Current .......................................................................................................... 13
Load Inertia....................................................................................................................... 13
Step Size ........................................................................................................................... 14
Step Pulse Type ................................................................................................................ 15
Step Pulse Noise Filter ..................................................................................................... 16
Self Test .................................................................................................................................... 16
Reference Materials .................................................................................................................. 17
Torque-Speed Curves ....................................................................................................... 17
Heating.............................................................................................................................. 18
Mechanical Outlines ......................................................................................................... 23
Technical Specifications........................................................................................................... 28
Amplifier .......................................................................................................................... 28
Motor ................................................................................................................................ 29
Digital Inputs .................................................................................................................... 29
Fault Output...................................................................................................................... 29
Physical............................................................................................................................. 29
Incremental Encoder Specifications ................................................................................. 29
Mating Connectors and Accessories................................................................................. 30
Alarm Codes ..................................................................................................................... 30
Worldwide Support and Services ............................................................................................. 31
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Table of Contents
Related Manuals for National Instruments NI ISM-7401
Summary of Contents for National Instruments NI ISM-7401
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Page 1: Table Of Contents
USER MANUAL NI ISM-7401/7402 Integrated Stepper This manual describes the NI ISM-7401 and the NI ISM-7402 integrated steppers. It describes electrical and mechanical characteristics of the devices, as well as I/O functionality. Contents Getting Started.......................... 2 Mounting the NI ISM-7401/7402..................... 3 Connecting the Power Supply .................... -
Page 2: Getting Started
Idle Current Run Current Getting Started You will need the following items to get started with your NI ISM-7401/7402: 12 VDC to 60 VDC power supply. NI PS-12 (NI part number 748906-01) or NI PS-13 (NI part number 748907-01) recommended. -
Page 3: Mounting The Ni Ism-7401/7402
Mounting the NI ISM-7401/7402 Mount your NI ISM-7401/7402 using four #6 or #8 screws. Securely fasten the NI ISM-7401/7402 to a smooth, flat metal surface to conduct heat away from the motor. To Heating prevent overheating, forced airflow from a fan may be required. Refer to the section for more information. -
Page 4: Connecting The Power Supply
Connect power supply negative (-) terminal to the connector terminal labeled V- The NI ISM-7401/7402 contains an internal fuse that connects to the power supply positive (+) terminal. This fuse is not user-replaceable. If you want to install a user-replaceable fuse in your system, install a fast-acting 4 A fuse in line with the positive (+) power supply lead. -
Page 5: Current
The following charts list the maximum current required for each motor at several common power supply voltages. Full load curves are abbreviated because of the speed limitation at lower Note voltages. NI ISM-7401/7402 User Manual | © National Instruments | 5... - Page 6 6 | ni.com | NI ISM-7401/7402 User Manual...
- Page 7 Connecting and have large capacitors for storing energy coming back from the drive. Refer to the Power Supply for more information. NI ISM-7401/7402 User Manual | © National Instruments | 7...
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Page 8: Connecting Input Signals
To convert STEP and DIR inputs to STEP CW and STEP CCW, move Note Step Pulse Type switch #8 to the ON position. Refer to for more information. Figure 4. Connector Pin Diagram Figure 5. Internal Circuit Diagram 8 | ni.com | NI ISM-7401/7402 User Manual... -
Page 9: Connection Examples: Step & Dir
Connecting the Enable input as shown in Figure 9 causes the drive to disable when the relay is closed and enable when the relay is open. Figure 9. Connecting an Input to a Switch or Relay NI ISM-7401/7402 User Manual | © National Instruments | 9... -
Page 10: Connecting The Digital Output
When the proximity sensor activates, the input closes. Note Connecting the Digital Output The NI ISM-7401/7402 has a digital output labeled OUT. This output closes to signal a fault condition. Figure 12. Internal Circuit Diagram Use this output to drive LEDs, relays, and the inputs of other electronic devices like PLCs. The positive collector and negative emitter terminals of the output transistor are available at the connector. - Page 11 Do not connect the output to more than 30 VDC. The current through the Caution output terminal must not exceed 80 mA. Figure 13. Sinking Output Figure 14. Sourcing Output Figure 15. Driving a Relay NI ISM-7401/7402 User Manual | © National Instruments | 11...
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Page 12: Using The Optional Encoder
Using the Optional Encoder There are three versions of the NI ISM-7401 and NI ISM-7402: the NI ISM-7401/7402 has a single shaft, the ISM-7401D/7402D has a dual shaft, and the ISM-7401E/7402E has a dual shaft with a 1000-line, incremental encoder assembled to the rear shaft of the unit. You can connect the A, B, and Index (Z) channel signals of this encoder to the external controller for position verification and enhanced performance, depending on the features of the controller. -
Page 13: Setting Idle Current
Switches 1 and 2 on the front of the NI ISM-7401/7402 control the percent of rated current that is applied to the motor. Set them according to the illustration below. Figure 17. Configuring Current on Switches 1 and 2 Setting Idle Current You can also reduce motor heating and power consumption by lowering the motor current when it is not moving. -
Page 14: Step Size
Step Size The NI ISM-7401/7402 requires a source of step pulses to command motion. This source can be a PLC, an indexer, a motion controller, or another type of device that can produce step pulses with a frequency proportional to the desired motor speed. The source must also be able to smoothly ramp the step speed up and down to produce smooth motor acceleration and deceleration. -
Page 15: Step Pulse Type
(half step) motors produce more audible noise than when they are microstepped (2000 steps per revolution and beyond). The NI ISM-7401/7402 includes a feature called microstep emulation, also called step smoothing, that can provide smooth motion when using full and half steps. Set switch 6 to the ON position, as shown in the figure below, to provide the smoothest possible motion when using full and half steps. -
Page 16: Step Pulse Noise Filter
This results in extra motion and inaccurate motor and load positioning. To solve this problem, the NI ISM-7401/7402 includes a digital noise filter on the STEP and DIR inputs. The default factory setting of this filter is 150 kHz, which is suitable for most applications. -
Page 17: Reference Materials
Figure 25. Configuring Self Test on Switch 4 Reference Materials Torque-Speed Curves Figure 26. Torque Curve for NI ISM-7401 ISM-7401 Torque at 5A/phase Speed (RPS) NI ISM-7401/7402 User Manual | © National Instruments | 17... -
Page 18: Heating
There are certain combinations of speed and voltage at which you can continuously operate a motor without damage. The drive electronics of the NI ISM-7401/7402 also dissipate power. The heat produced by the electronics is dependent on power supply voltage and motor speed. - Page 19 Maximum Duty Cycle Figure 28. Duty Cycle for the ISM-7401 Figure 29. Duty Cycle for the ISM-7402 NI ISM-7401/7402 User Manual | © National Instruments | 19...
- Page 20 Temperature Figure 30. Temperature vs. Speed for the NI ISM-7401 ISM-7401 Temperature vs Speed Figure 31. Temperature vs. Speed for the NI ISM-7402 ISM-7402 Temperature vs Speed 20 | ni.com | NI ISM-7401/7402 User Manual...
- Page 21 Power Consumption Figure 32. Power Consumption for the NI ISM-7401 ISM-7401 Power Consumption 5.0A/phase, Full Load Figure 33. Power Consumption for the NI ISM-7402 ISM-7402 Power Consumption 5A/phase, Full Load NI ISM-7401/7402 User Manual | © National Instruments | 21...
- Page 22 Power Dissipation Figure 34. Power Dissipation for the NI ISM-7401 ISM-7401 Power Dissipation 5.0A/phase, Full Load Figure 35. Power Dissipation for the NI ISM-7402 ISM-7402 Power Dissipation 5.0A/phase, Full Load 22 | ni.com | NI ISM-7401/7402 User Manual...
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Page 23: Mechanical Outlines
Mechanical Outlines Figure 36. Mechanical Outline for the NI ISM-7401 Top View Side View Front View Rear View NI ISM-7401/7402 User Manual | © National Instruments | 23... - Page 24 Figure 37. Mechanical Outline for the NI ISM-7401D Top View Side View Front View Rear View 24 | ni.com | NI ISM-7401/7402 User Manual...
- Page 25 Figure 38. Mechanical Outline for the NI ISM-7401E Top View Side View Front View Rear View NI ISM-7401/7402 User Manual | © National Instruments | 25...
- Page 26 Figure 39. Mechanical Outline for the NI ISM-7402 Top View Side View Front View Rear View 26 | ni.com | NI ISM-7401/7402 User Manual...
- Page 27 Figure 40. Mechanical Outline for the NI ISM-7402D Top View Side View Front View Rear View NI ISM-7401/7402 User Manual | © National Instruments | 27...
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Page 28: Technical Specifications
Protection ............Over-voltage, under-voltage, over-current, over-temperature Supply voltage ..........12 VDC to 60 VDC Under-voltage alarm .........10 VDC Over-voltage shutdown ......75 VDC Over-temp shutdown.........85 °C Motor current ............2.5 to 5.0 A/phase peak of sine 28 | ni.com | NI ISM-7401/7402 User Manual... -
Page 29: Motor
Operating temperature range ......0 °C to 40 °C Incremental Encoder Specifications 10-pin connector signals (pin assignments) Ground ............. 1, 2 Index- ............3 Index+ ............4 A- ............. 5 NI ISM-7401/7402 User Manual | © National Instruments | 29... -
Page 30: Mating Connectors And Accessories
Over temperature RRRGG 3 red, 2 green Internal voltage out of range RRRRG 4 red, 1 green Power supply voltage too high RRRRGG 4 red, 2 green Power supply voltage too low 30 | ni.com | NI ISM-7401/7402 User Manual... -
Page 31: Worldwide Support And Services
For patents covering NI products/technology, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your media, or the National Instruments Patents Notice at ni.com/patents. You can find information about end-user license agreements (EULAs) and third-party legal notices in the readme file for your NI product.
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