National Instruments MID-7604 User Manual
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National Instruments MID-7604 User Manual

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USER GUIDE
MID-7604/7602 P
Contents
National Instruments™, NI™, and ni.com™ are trademarks of National Instruments Corporation. Product and company names mentioned herein are
trademarks or trade names of their respective companies.
322454C-01
Copyright © 1999, 2001 National Instruments Corp. All rights reserved.
Download from Www.Somanuals.com. All Manuals Search And Download.
OWER
This user guide describes the electrical and mechanical aspects of the
MID-7604/7602 power drive and how to use the MID-7604/7602 with your
motion controller.
Compliance ............................................................................................. 2
Conventions ............................................................................................ 3
Introduction ............................................................................................. 4
What You Need to Get Started ............................................................... 4
Safety Information .................................................................................. 5
Front Panel Switches............................................................................... 7
Back Panel Connector Wiring................................................................. 8
Host Bus Interlock Circuit ...................................................................... 9
Front Panel LEDs.................................................................................... 9
Driver Fault Output LEDs ............................................................... 10
Driver Inhibit LEDs ......................................................................... 10
Limit Status LEDs ........................................................................... 10
Front Panel DIP Switch Settings............................................................. 11
Microstepping Selection .................................................................. 12
Output Current Settings ................................................................... 13
Inhibit Input Polarity Setting ........................................................... 15
Limit Status LED Polarity Setting ................................................... 15
Back Panel Connector Wiring................................................................. 16
Motor Power Terminal Blocks ........................................................ 16
Encoder Terminal Blocks ................................................................ 17
Limit Switch Terminal Blocks......................................................... 20
Breakpoint and Trigger Terminal Blocks ........................................ 20
Analog I/O Terminal Blocks............................................................ 21
Accessories for Optional Use.................................................................. 22
Strain-Relief Bar .............................................................................. 22
Panel-Mount Kit (Included)............................................................. 23
Amplifier/Driver Command Signals....................................................... 23
Stepper Motor Configurations ................................................................ 24
Specifications .......................................................................................... 27
D
RIVE
July 2001

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Summary of Contents for National Instruments MID-7604

  • Page 1: Table Of Contents

    Amplifier/Driver Command Signals............23 Stepper Motor Configurations ..............24 Specifications ..................27 National Instruments™, NI™, and ni.com™ are trademarks of National Instruments Corporation. Product and company names mentioned herein are trademarks or trade names of their respective companies. 322454C-01 Copyright © 1999, 2001 National Instruments Corp. All rights reserved.

  • Page 2: Compliance

    Classification requirements are the same for the Federal Communications Commission (FCC) and the Canadian Department of Communications (DOC). Changes or modifications not expressly approved by National Instruments could void the user’s authority to operate the equipment under the FCC Rules.

  • Page 3: Conventions

    This font is also used for the proper names of disk drives, paths, directories, programs, subprograms, subroutines, device names, functions, operations, variables, filenames and extensions, and code excerpts. © National Instruments Corporation MID-7604/7602 Power Drive Download from Www.Somanuals.com. All Manuals Search And Download.

  • Page 4: Introduction

    I/O, and other motion hardware to National Instruments’ motion controllers. The MID-7604/7602 can drive a broad range of stepper motors with its rugged microstepping bipolar chopper driver and user-selectable current-per-phase settings. In all configurations, power supplies are built-in and use standard 230/115 VAC for operation.

  • Page 5: Safety Information

    One of the following shielded cable assemblies, as applicable: – SH68-C68-S (part number 186381-02) – SHC68-C68-S (part number 186380-02) Detailed specifications for the MID-7604/7602 are in the Specifications section in this guide. Safety Information Caution The following paragraphs contain important safety information you must follow when installing and operating the device.
  • Page 6 Mains is defined as the electricity supply system to which the equipment concerned is designed to be connected for either powering the equipment or for measurement purposes. MID-7604/7602 Power Drive ni.com Download from Www.Somanuals.com. All Manuals Search And Download.

  • Page 7: Front Panel Switches

    7 mm. Failure to do so could result in electric shock leading to serious bodily injury or death. The bottom surface of the MID-7604/7602 can get very hot to the touch under Caution certain conditions.

  • Page 8: Back Panel Connector Wiring

    The remaining circuitry remains active, including the quadrature encoder circuit. You must change the MID-7604/7602 main input fuse on the front panel if you Caution change the line voltage from the factory setting. Refer to the Specifications section of this guide for fuse specifications.

  • Page 9: Host Bus Interlock Circuit

    For proper operation, you must set this switch to match your power source. You must change the MID-7604/7602 main input fuse on the front panel if you Caution change the line voltage from the factory setting. Refer to the Specifications section of this guide for fuse specifications.

  • Page 10: Driver Fault Output Leds

    You can select the polarity for the limit status LEDs from the front panel DIP switches. See the Front Panel DIP Switch Settings section in this guide for more information. MID-7604/7602 Power Drive ni.com Download from Www.Somanuals.com. All Manuals Search And Download.

  • Page 11: Front Panel Dip Switch Settings

    Front Panel DIP Switch Settings The MID-7604/7602 front panel has a detachable metal plate that when removed provides access to four 10-position DIP switch banks. Refer to Figure 1 for the location of these switches. Use the first nine DIP switches on each 10-position DIP switch bank to configure the microstep rate, peak output current, and current reduction for each axis.

  • Page 12: Microstepping Selection

    Microstepping Selection The MID-7604/7602 uses bipolar chopper, two-phase microstepping drivers with a broad range of microstep rates. The factory default setting is 10-times microstepping (2,000 steps/rev with standard 1.8º stepper motors). Table 2 shows the DIP switch settings for all possible microstep settings.

  • Page 13: Output Current Settings

    2 3 4 2 3 4 If you are connecting multiple motors to your MID-7604/7602, verify that the total power dissipated by the motors at any given time is less than the total power the drive can provide. If the total power requirement exceeds the capability of the drive at any point, the drive will provide less power to the motors than desired until the total power requirement drops back down.
  • Page 14 MID-7604/7602. If the value is greater than 80 W continuous, you may still be within the operating capabilities of the MID-7604/7602, since it is unlikely you will run all of your motors simultaneously at their maximum levels. Make a reasonable estimation of the maximum power your motors will require at any given time and verify that this value is less than 80 W continuous.

  • Page 15: Inhibit Input Polarity Setting

    Inhibit Input Polarity Setting The MID-7604/7602 has a DIP switch that globally sets the polarity for the inhibit input for all axes. DIP switch 10 on the axis 1 DIP switch bank controls this setting. Refer to Figures 1 and 3 for the location of this switch.

  • Page 16: Back Panel Connector Wiring

    The stepper motor connectors on this drive are energized when the unit is Warning powered on. Disconnect the MID-7604/7602 unit from the power outlet before connecting wires to or disconnecting wires from the stepper connectors. Strip back the insulation of the stepper wires to the stepper connectors no more than 7 mm.

  • Page 17: Encoder Terminal Blocks

    Never connect unused center taps or winding terminals to pin 3 (ground) or to each other. Encoder Terminal Blocks For quadrature incremental encoder signals, each MID-7604/7602 axis has a separate 8-position removable screw terminal block. Where applicable, the MID-7604/7602 accepts two types of encoder signal inputs: single-ended (TTL) or differential line driver.
  • Page 18 If the encoder cable length is greater than 10 ft, use encoders with line driver outputs for your applications. Power for a +5 V encoder—generated by a power supply inside the MID-7604/7602—is available on pin 7. If you require other encoder power voltages, reference an external power supply to Note the Digital Ground signal on the 8-pin encoder terminal block.
  • Page 19 When connecting the encoder wiring to your MID-7604/7602, use shielded wire of at least 24 AWG. Analog noise filters filter the encoder inputs in the MID-7604/7602. You must use cables with twisted pairs and an overall shield for improved noise immunity and enhanced encoder signal integrity.

  • Page 20: Limit Switch Terminal Blocks

    The MID-7604/7602 stepper drive remains in a reset state for 500 ms after the inhibit is deasserted. Therefore, you can lose steps if you attempt to issue a start motion command within 500 ms from the deassertion of the stepper drive inhibit.

  • Page 21: Analog I/O Terminal Blocks

    Digital Ground Figure 12. Breakpoint Terminal Block Pin Assignment Analog I/O Terminal Blocks The MID-7604/7602 has two analog I/O connectors. The analog input connector uses a 6-pin removable terminal block, and the analog output connector uses a 5-pin removable terminal block.

  • Page 22: Accessories For Optional Use

    The strain-relief bar provides strain relief for wiring to the back panel terminals of the MID-7604/7602. The arms of the strain-relief bar attach to the sides of the MID-7604/7602 with the thumb nuts facing upward, as shown in Figure 15.

  • Page 23: Panel-Mount Kit (Included)

    Panel-Mount Kit (Included) The panel-mount kit allows you to mount the MID-7604/7602 inside a cabinet or enclosure. Using the provided screws, attach the panel-mount kit to the rear and front set of screw holes on the side panels of the MID-7604/7602, as shown in Figure 16.

  • Page 24: Stepper Motor Configurations

    MID-7604/7602. The MID-7604/7602 is compatible with all configurations of two-phase stepper motors. The MID-7604/7602 is not compatible with 5-lead unipolar stepper motors or Note 5-phase stepper motors. 2-phase stepper motors come in 4-, 6-, and 8-wire variations. Figure 17 shows a 6-wire and an 8-wire stepper motor.
  • Page 25 Phase A Phase B-CT Motor Case Ground Ground Phase B Phase B Phase B Shield Figure 19. Parallel Stepper Motor Wiring (Higher Speed, Lower Torque) © National Instruments Corporation MID-7604/7602 Power Drive Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 26 Figure 21 shows the wiring for a typical 4-wire motor. Phase B Phase A Phase A Motor Case Ground Ground Phase B Phase B Phase B Shield Figure 21. 4-Wire Motor Wiring MID-7604/7602 Power Drive ni.com Download from Www.Somanuals.com. All Manuals Search And Download.

  • Page 27: Specifications

    Some signals have compatibility defined as signal pass-through, which means the MID-7604/7602 may have passive filtering on these signals but will not affect the voltage range or current handling capability. Consult your motion controller specifications to determine the allowable voltage range and logic level compatibility of the signal.
  • Page 28 Compatibility ..........Signal pass-through Included Connectors Encoders ..........8-position mini-combicon 3.81 mm plug (1 per axis) Limits............6-position mini-combicon 3.81 mm plug (1 per axis) Motors.............5-position combicon 5.08 mm plug (1 per axis) MID-7604/7602 Power Drive ni.com Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 29 Undervoltage threshold ......4 VDC Physical Length ............ 30.7 cm (12.1 in.) Width............25.4 cm (10 in.) Height............. 4.3 cm (1.7 in.) Weight ............ 4.5 kg (10 lb.) © National Instruments Corporation MID-7604/7602 Power Drive Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 30 • EN 61010-1:1993/A2:1995, IEC 61010-1:1990/A2:1995 • UL 3101-1:1993, UL 3111-1:1994, UL 3121-1:1998 • CAN/CSA C22.2 No. 1010.1:1992/A2:1997 UL Recognized to UL 508C, power conversion equipment, File # E208822 MID-7604/7602 Power Drive ni.com Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 31 Technical Support Resources NI Web Support National Instruments Web support is your first stop for help in solving installation, configuration, and application problems and questions. Online problem-solving and diagnostic resources include frequently asked questions, knowledge bases, product-specific troubleshooting wizards, guides, drivers, software updates, and more. Web support is available through the Technical Support section of ni.com...
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