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

Power drive
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  • Page 1 (217) 352-9330 | Click HERE Find the National Instruments MID-7604 at our website:...

  • Page 2: Table Of Contents

    USER GUIDE MID-7604/7602 Power Drive This user guide describes the electrical and mechanical aspects of the MID-7604/7602 power drive and how to use the power drive with your motion controller. Contents Conventions .................... 2 Introduction ..................... 3 What You Need to Get Started ............... 3 Compliance with FCC/Canada Radio Frequency Interference Regulations...................

  • 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. MID-7604/7602 Power Drive User Guide ni.com...

  • 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: Compliance With Fcc/Canada Radio Frequency Interference Regulations

    One of the following shielded cable assemblies, as applicable: – SH68-C68-S (part number 186381-02) – SHC68-C68-S (part number 186380-02) For detailed specifications for the MID-7604/7602 power drive, refer to the Specifications section of this guide. Compliance with FCC/Canada Radio Frequency Interference Regulations...

  • Page 6: Safety Information

    If the device is damaged, turn it off and do The CE marking Declaration of Conformity contains important supplementary information and instructions for the user or installer. © National Instruments Corporation MID-7604/7602 Power Drive User Guide...
  • Page 7 If necessary, return the device to National Instruments for repair. Keep away from live circuits. Do not remove equipment covers or shields unless you are trained to do so. If signal wires are connected to the device, hazardous voltages can exist even when the equipment is turned off.
  • Page 8 MAINS is defined as the (hazardous live) electrical supply system to which equipment is designed to be connected for the purpose of powering the equipment. Suitably rated measuring circuits may be connected to the MAINS for measuring purposes. © National Instruments Corporation MID-7604/7602 Power Drive User Guide...

  • Page 9: 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 Hot Surface certain conditions.

  • Page 10: Back Panel Connector Wiring

    In older versions of the MID-7604/7602, the red status LEDs do not illuminate when Note the yellow status LEDs illuminate. This behavior only occurs in newer versions of the MID-7604/7602. Both the AC POWER and ENABLE switches can inhibit the stepper drivers.

  • Page 11: Host Bus Interlock Circuit

    MID-7604/7602. Wire the motor power, limit switch, encoder, and I/O terminal blocks as described in this guide and to your specific system requirements. 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...

  • Page 12: Driver Fault Output Leds

    Refer to the Driver Inhibit LEDs section of this guide for more information about inhibit conditions. In older versions of the MID-7604/7602, the red status LEDs do not illuminate when Note the yellow status LEDs illuminate. This behavior only occurs in newer versions of the MID-7604/7602.

  • Page 13: 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 14: Output Current Settings

    7 8 9 Output Current Settings The MID-7604/7602 can provide 0.20 to 1.4 A peak (0.14 to 1 A RMS), depending on the peak output current DIP switch settings for each axis. DIP switches 1 through 4 control the peak output current. Table 3 shows the DIP switch settings for all possible peak output current settings.
  • Page 15 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 16: Inhibit Input Polarity Setting

    LED (middle row) and red status LED (top row) illuminates for the axis. In older versions of the MID-7604/7602, the red status LEDs do not illuminate when Note the yellow status LEDs illuminate. This behavior only occurs in newer versions of the MID-7604/7602.

  • Page 17: Limit Status Led Polarity Setting

    Limit Status LED Polarity Setting The MID-7604/7602 has a DIP switch that globally sets the polarity for the Limit Status LED. DIP switch 10 on the axis 2 DIP switch bank controls this setting. Refer to Figures 1 and 3 for the location of this switch.

  • Page 18: Encoder Terminal Blocks

    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 19 If you require other encoder power voltages, reference an external power supply to the Digital Ground signal on the 8-pin encoder terminal block. The MID-7604/7602 supports differential inputs for Phase A, Phase B, and Index signals. You can easily accommodate encoders with various phase relationships by swapping the signals and/or connecting them to the inverting inputs as specific applications require.
  • Page 20 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 21: Limit Switch Terminal Blocks

    (killed state). Note In older versions of the MID-7604/7602, the red status LEDs do not illuminate when the yellow status LEDs illuminate. This behavior only occurs in newer versions of the MID-7604/7602.

  • Page 22: Analog I/O Terminal Blocks

    +5 V supplied by the MID-7604/7602, and digital ground. Figures 11 and 12 show the breakpoint and trigger 6-position terminal block assignments. Trigger Input 1 Trigger Input 2 Trigger Input 3 Trigger Input 4...

  • Page 23: 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 24: Amplifier/Driver Command Signals

    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 25: Stepper Motor Configurations

    MID-7604/7602. The MID-7604/7602 is compatible with all configurations of two-phase stepper motors. Note The MID-7604/7602 is not compatible with 5-lead unipolar stepper motors or 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 26 With this configuration, it is typically not possible to produce the rated torque of the motor without the risk of the motor overheating because only half of the windings are being used. © National Instruments Corporation MID-7604/7602 Power Drive User Guide...

  • 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 Inhibit high voltage....2 V Inhibit output Voltage range ........0 to 5 VDC Output low voltage ....0.5 V at 64 mA Output high voltage ....2.4 V at 32 mA © National Instruments Corporation MID-7604/7602 Power Drive User Guide...
  • Page 29 Analog input ...........6-position mini-combicon 3.81 mm plug (1 total) Analog output .........5-position mini-combicon 3.81 mm plug (1 total) AC power..........Detachable AC power cord (IEC standard type) Motion I/O ..........68-pin female high density VHDCI type MID-7604/7602 Power Drive User Guide ni.com...
  • Page 30 (10 in. × 1.7 in. × 12.1 in.) Weight ............ 4.5 kg (10 lb.) Environment The MID-7604/7602 is intended for indoor use only. Operating temperature......0 ºC to 40 ºC Storage temperature ....... –20 ºC to 70 ºC Relative humidity ........10% to 90%, noncondensing Pollution Degree ........
  • Page 31 Refer to the Declaration of Conformity (DoC) for this product for any additional Note regulatory compliance information. To obtain the DoC for this product, visit , search by model number or product line, and click the ni.com/certification appropriate link in the Certification column. MID-7604/7602 Power Drive User Guide ni.com...

  • Page 32: Where To Go For Support

    Where to Go for Support The National Instruments Web site is your complete resource for technical support. At you have access to everything from ni.com/support troubleshooting and application development self-help resources to email and phone assistance from NI Application Engineers.
  • Page 33 Instruments trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering National Instruments products, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your CD, or ni.com/patents.

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Mid-7602

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