National instruments analog input module operating instructions and specifications (35 pages)
Summary of Contents for National Instruments NI 9401
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OPERATING INSTRUCTIONS AND SPECIFICATIONS NI 9401 8-Channel, TTL Digital Input/Output Module Français Deutsch ni.com/manuals...
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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.
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;...
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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.
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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...
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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.
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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.
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...
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...
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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.
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...
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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.
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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.
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...
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.
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.
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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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