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USER MANUAL
NI ISM-7400
Integrated Stepper
This manual describes the NI ISM-7400 integrated stepper. It describes electrical and
mechanical characteristics of the devices, as well as I/O functionality.
Contents
Getting Started.......................................................................................................................... 2
Mounting the NI ISM-7400 ...................................................................................................... 3
Connecting the Power Supply .................................................................................................. 3
Choosing a Power Supply......................................................................................................... 4
Voltage.............................................................................................................................. 4
Current .............................................................................................................................. 5
Regeneration..................................................................................................................... 6
Connecting Input Signals.......................................................................................................... 6
Connection Examples: STEP & DIR................................................................................ 8
Connection Examples: EN................................................................................................ 9
Connecting the Digital Output.................................................................................................. 10
Using the Optional Encoder ..................................................................................................... 11
Configuring the NI ISM-7400 .................................................................................................. 12
Setting the Current............................................................................................................ 12
Setting Idle Current .......................................................................................................... 12
Load Inertia....................................................................................................................... 13
Step Size ........................................................................................................................... 13
Step Pulse Type ................................................................................................................ 16
Step Pulse Noise Filter ..................................................................................................... 16
Self Test .................................................................................................................................... 17
Reference Materials .................................................................................................................. 18
Torque-Speed Curves ....................................................................................................... 18
Heating.............................................................................................................................. 18
Mechanical Outlines ......................................................................................................... 21
Technical Specifications........................................................................................................... 23
Amplifier .......................................................................................................................... 23
Motor ................................................................................................................................ 23
Digital Inputs .................................................................................................................... 24
Fault Output...................................................................................................................... 24
Physical............................................................................................................................. 24
Incremental Encoder Specifications ................................................................................. 24
Mating Connectors and Accessories................................................................................. 25
Alarm Codes ..................................................................................................................... 25
Worldwide Support and Services ............................................................................................. 26
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Table of Contents
Related Manuals for National Instruments ISM-7400
Summary of Contents for National Instruments ISM-7400
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Page 1: Table Of Contents
USER MANUAL NI ISM-7400 Integrated Stepper This manual describes the NI ISM-7400 integrated stepper. It describes electrical and mechanical characteristics of the devices, as well as I/O functionality. Contents Getting Started.......................... 2 Mounting the NI ISM-7400 ...................... 3 Connecting the Power Supply ....................3 Choosing a Power Supply...................... -
Page 2: Getting Started
Figure 1. Block Diagram Getting Started You will need the following items to get started with your NI ISM-7400: 12 VDC to 48 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-7400
Mount your NI ISM-7400 using four M3 screws, the mounting hole depth is 4.5 mm. Securely fasten the NI ISM-7400 to a smooth, flat metal surface to conduct heat away from the motor. To prevent overheating, forced airflow from a fan may be required. Refer to the... -
Page 4: Choosing A Power Supply
T he NI ISM-7400 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 2 A fuse in line with the positive (+) power supply lead. Figure 3 shows the NI ISM-7400 connections. -
Page 5: Current
Current The following charts list the maximum current required for each motor at several common power supply voltages. NI ISM-7400 User Manual | © National Instruments | 5... -
Page 6: Regeneration
EN—5 V to 24 V input for commanding the removal of power from the motor To convert STEP and DIR inputs to STEP CW and STEP CCW, move switch Note #8 to the ON position. Refer to Step Pulse Type for more information. 6 | ni.com | NI ISM-7400 User Manual... - Page 7 Figure 4. Connector Pin Diagram Figure 5. Internal Circuit Diagram NI ISM-7400 User Manual | © National Instruments | 7...
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Page 8: Connection Examples: Step & Dir
Figure 6. Mating Cable Diagram Connection Examples: STEP & DIR Figure 7. Connecting to Indexer with Sourcing Outputs Figure 8. Connecting to Indexer with Sinking Outputs 8 | ni.com | NI ISM-7400 User Manual... -
Page 9: Connection Examples: En
Connecting the Enable signal as shown in Figures 11 and 12 causes the drive to disable when the proximity sensor activates. Figure 11. Connecting an NPN Type Proximity Sensor to an input Figure 12. Connecting a PNP Type Proximity Sensor to an input NI ISM-7400 User Manual | © National Instruments | 9... -
Page 10: Connecting The Digital Output
Connecting the Digital Output The NI ISM-7400 has a digital output labeled OUT. This output closes to signal a fault condition. Figure 13. 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: Using The Optional Encoder
Figure 16. Driving a Relay Using the Optional Encoder There are three versions of the NI ISM-7400: the NI ISM-7400 has a single shaft, the ISM-7400D has a dual shaft, and the ISM-7400E has a dual shaft with a 1000-line, incremental encoder assembled to the rear shaft of the unit. -
Page 12: Configuring The Ni Ism-7400
70% and the heating to about 50%. Switches 1 and 2 on the front of the NI ISM-7400 control the percent of rated current that will be applied to the motor. Set them according to the illustration below. -
Page 13: Load Inertia
Figure 20. Configuring Load Inertia on Switch 7 Step Size The NI ISM-7400 requires a source of step pulses to command motion. This may be a PLC, an indexer, a motion controller, or another type of device. The device must be able to produce step pulses with a frequency proportional to the desired motor speed. - Page 14 Select the steps per revolution setting that best suits your system capabilities. Figure 21. Configuring Step Size on Switches 1, 2, 3, and 4 14 | ni.com | NI ISM-7400 User Manual...
- Page 15 (half step) motors produce more audible noise than when they are microstepped (2000 steps per revolution and beyond). The NI ISM-7400 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.
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Page 16: Step Pulse Type
(STEP CCW). Set switch 8 as shown in the following figure to allow the NI ISM-7400 to accept this type of signal. In STEP CW/STEP CCW mode, connect the CW signal to the STEP input and connect the CCW signal to the DIR input. -
Page 17: Self Test
This feature can be used to confirm that the motor is correctly wired, selected, and otherwise operational Figure 26. Configuring Self Test on Switch 4 NI ISM-7400 User Manual | © National Instruments | 17... -
Page 18: Reference Materials
There are certain combinations of speed and voltage at which a motor cannot be continuously operated without damage. The drive electronics of the NI ISM-7400 also dissipate power. The heat produced by the electronics is dependent on power supply voltage and motor speed. - Page 19 National Instruments tested the NI ISM-7400 in a 40 °C (104 °F) Note environment with the motor mounted to an aluminum plate sized to provide a surface area consistent with the motor power dissipation. Your results might vary. Maximum Duty Cycle Figure 28.
- Page 20 Power Dissipation Figure 30. Power Dissipation for the NI ISM-7400 20 | ni.com | NI ISM-7400 User Manual...
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Page 21: Mechanical Outlines
Mechanical Outlines Figure 31. Mechanical Outline for the NI ISM-7400 NI ISM-7400 User Manual | © National Instruments | 21... - Page 22 Figure 32. Mechanical Outline for the NI ISM-7400D 22 | ni.com | NI ISM-7400 User Manual...
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Page 23: Technical Specifications
Over-voltage shutdown......53 VDC Over-temp shutdown ........85°C Motor current ............ 1.0 to 2.0 A/phase peak of sine (four settings via DIP switches) Motor Torque ............... Refer to Torque-Speed Curves NI ISM-7400 User Manual | © National Instruments | 23... -
Page 24: Digital Inputs
Power supply requirements.......5 VDC at 56 mA typical, 59 mA max Encoder internal differential line driver (26C31) Source ............20 mA at TTL levels Sink ............20 mA at TTL levels Maximum encoder frequency ......100,000 cycles per second 24 | ni.com | NI ISM-7400 User Manual... -
Page 25: Mating Connectors And Accessories
Power supply voltage too high RRRRGG 4 red, 2 green Power supply voltage too low RRRRRG 5 red, 1 green Over current/short circuit RRRRRRG 6 reds, 1 green Open motor winding NI ISM-7400 User Manual | © National Instruments | 25... -
Page 26: Worldwide Support And Services
NI product. Refer to the Export Compliance Information at ni.com/legal/export-compliance for the National Instruments global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/export data. © 2013 National Instruments. All rights reserved.