National Instruments NI 9401 Operating Instructions Manual
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National Instruments NI 9401 Operating Instructions Manual

National instruments ttl digital input/output module operating instructions and specifications
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OPERATING INSTRUCTIONS AND SPECIFICATIONS
NI 9401
8-Channel, TTL Digital Input/Output Module
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Summary of Contents for National Instruments NI 9401

  • Page 1 OPERATING INSTRUCTIONS AND SPECIFICATIONS NI 9401 8-Channel, TTL Digital Input/Output Module Français Deutsch ni.com/manuals...
  • Page 2 This document describes how to use the National Instruments 9401 and includes specifications and pin assignments for the NI 9401. Visit ni.com/info which software you need for the modules you are using. For information about installing, configuring, and programming the system, refer to the system documentation.

  • Page 3: Safety Guidelines For Hazardous Locations

    Touching this component may result in bodily injury. Safety Guidelines for Hazardous Locations The NI 9401 is suitable for use in Class I, Division 2, Groups A, B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nC IIC T4, and Ex nC IIC T4 hazardous locations;...
  • Page 4 II 3G and is suitable for use in Zone 2 hazardous locations. If you are using the NI 9401 in Gas Group IIC hazardous locations or in ambient temperatures of –40 °C ≤ Ta ≤ 70 °C, you must use the device in an NI chassis that has been evaluated as EEx nC IIC T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.
  • Page 5 Power supply and module cables must be separated on opposite sides of the enclosure and must enter and exit through opposing enclosure walls. © National Instruments Corp. and search for the LR certificate, or NI 9401 Operating Instructions and Specifications...
  • Page 6 Connecting the NI 9401 The NI 9401 has a 25-pin DSUB connector that provides connections for eight digital input/output channels. Figure 1. NI 9401 Pin Assignments NI 9401 Operating Instructions and Specifications DIO0 DIO1 DIO2 DIO3 DIO4 DIO5 DIO6 DIO7...
  • Page 7 Note that all four channels in the port must share the same line direction. Refer to the software help for information about configuring ports on the NI 9401. Each channel also has a pull-down resistor and includes overvoltage, overcurrent, and short-circuit protection.
  • Page 8 Figure 2 illustrates how to connect an SPI device to the NI 9401. In this example, the three channels assigned to output signals are on one port and the channel assigned to an input signal is on the other port.
  • Page 9 NI 9401. Dev 1 +5 V Dev 2 +5 V Dev 3 Figure 3. Connecting Digital Devices to the NI 9401 © National Instruments Corp. DIO0 as Input TTL Signal DIO1 as Input DIO7 as Output NI 9401 Operating Instructions and Specifications...

  • Page 10: Overcurrent Protection

    Overcurrent protection on the NI 9401 allows only a specified amount of current for switching DIO channels or sourcing the output load. If the NI 9401 goes into an overcurrent state, by exceeding the specified maximum switching frequency or the...

  • Page 11: Sleep Mode

    In sleep mode, the system consumes minimal power and may dissipate less heat than it does in normal mode. Refer to the Specifications section for more information about power consumption and thermal dissipation. © National Instruments Corp. NI 9401 Operating Instructions and Specifications...

  • Page 12: Specifications

    The following specifications are typical for the range –40 to 70 °C unless otherwise noted. All voltages are relative to COM unless otherwise noted. Input/Output Characteristics Number of channels... 8 DIO channels Default power-on line direction ... Input Input/output type... TTL, single-ended NI 9401 Operating Instructions and Specifications ni.com...
  • Page 13 ... 5.25 V max Sourcing 100 μA ... 4.7 V min Sourcing 2 mA... 4.3 V min Low, V Sinking 100 μA ... 0.1 V max Sinking 2 mA... 0.4 V max © National Instruments Corp. NI 9401 Operating Instructions and Specifications...
  • Page 14 Input capacitance ... 30 pF typ Input rise/fall time... 500 ns max Overvoltage protection, channel-to-COM ... ±30 V max on one channel at NI 9401 Operating Instructions and Specifications ≤ 4.5 V)... ±250 μA typ a time; however, continued use at this level will degrade the life of the module.

  • Page 15: Power Requirements

    Physical Characteristics If you need to clean the module, wipe it with a dry towel. Weight... 145 g (5.1 oz) © National Instruments Corp. Bellcore Issue 2, Method 1, Case 3, Limited Part Stress Method NI 9401 Operating Instructions and Specifications...

  • Page 16: Isolation Voltages

    MAINS voltage. MAINS is a hazardous live electrical The maximum voltage that can be applied or output between any channel and COM without damaging the module or other devices. NI 9401 Operating Instructions and Specifications at a time, Measurement Category I...
  • Page 17 Such voltage measurements include signal levels, special equipment, limited-energy parts of equipment, circuits powered by regulated low-voltage sources, and electronics. Do not connect the NI 9401 to signals or use Caution for measurements within Measurement Categories II, III, or IV.
  • Page 18 Europe (DEMKO)... EEx nC IIC T4 Environmental National Instruments C Series modules are intended for indoor use only but may be used outdoors if installed in a suitable enclosure. Refer to the manual for the chassis you are using for more information about meeting these specifications.

  • Page 19: Shock And Vibration

    Sinusoidal (IEC 60068-2-6) ... 5 g, 10 to 500 Hz Operating shock (IEC 60068-2-27)... 30 g, 11 ms half sine, © National Instruments Corp. noncondensing noncondensing , 10 to 500 Hz 50 g, 3 ms half sine, 18 shocks at 6 orientations NI 9401 Operating Instructions and Specifications...

  • Page 20: Electromagnetic Compatibility

    2006/95/EC; Low-Voltage Directive (safety) • 2004/108/EC; Electromagnetic Compatibility Directive (EMC) Refer to the Declaration of Conformity (DoC) for Note this product for any additional regulatory compliance information. To obtain the DoC for this product, visit NI 9401 Operating Instructions and Specifications ni.com...

  • Page 21: Environmental Management

    Certification column. Environmental Management National Instruments is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial not only to the environment but also to NI customers.

  • Page 22: Where To Go For Support

    China RoHS compliance, go to environment/rohs_china Where to Go for Support The National Instruments Web site is your complete resource for technical support. At everything from troubleshooting and application development self-help resources to email and phone assistance from NI Application Engineers.
  • Page 23 Sweden 46 (0) 8 587 895 00, Switzerland 41 56 2005151, Taiwan 886 02 2377 2222, Thailand 662 278 6777, Turkey 90 212 279 3031, United Kingdom 44 (0) 1635 523545 © National Instruments Corp. NI 9401 Operating Instructions and Specifications...
  • Page 24 National Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation. Refer to the Terms of Use section on ni.com/legal for more information about National Instruments trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies.

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