Summary of Contents for National Instruments NI 9401
Page 1
(217) 352-9330 | Click HERE Find the National Instruments NI 9401 at our website:...
Page 2
OPERATING INSTRUCTIONS AND SPECIFICATIONS NI 9401 8-Channel, TTL Digital Input/Output Module Français Deutsch ni.com/manuals...
Page 3
Refer to the documentation for each component in the system to determine the safety ratings and specifications for the entire system. Visit and enter for information ni.com/info cseriesdoc about C Series documentation. 2 | ni.com | NI 9401 Operating Instructions and Specifications...
Instruments for repair. 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; and nonhazardous locations only.
Page 5
IP 54 as defined by IEC 60529 and EN 60529. For Division 2 and Zone 2 applications, Caution connected signals must be within the following limit: Capacitance ......0.2 μF max 4 | ni.com | NI 9401 Operating Instructions and Specifications...
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 7
(National Instruments part number 711627-01) in accordance with the product installation instructions. Refer to the NI 9401 product page on for purchasing information ni.com about clamp-on ferrite beads. 6 | ni.com | NI 9401 Operating Instructions and Specifications...
Cable Requirements for EMC Compliance Select and install cables for the NI 9401 in accordance with the following requirements: • Install a clamp-on ferrite bead (National Instruments part number 711627-01) on cable that you are connecting to NI 9401. •...
Power supply and module cables must be separated on opposite sides of the enclosure and must enter and exit through opposing enclosure walls. 8 | ni.com | NI 9401 Operating Instructions and Specifications...
Page 11
Refer to the Specifications section for more information about input thresholds and overvoltage protection. Refer to the Overcurrent Protection section for more information about overcurrent protection. 10 | ni.com | NI 9401 Operating Instructions and Specifications...
Page 12
Figure 3 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 13
Figure 4. Connecting Digital Devices to the NI 9401 DIO0 as Input TTL Signal Dev 1 DIO1 as Input +5 V Dev 2 +5 V DIO7 as Output Dev 3 NI 9401 12 | ni.com | NI 9401 Operating Instructions and Specifications...
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 14 | ni.com | NI 9401 Operating Instructions and Specifications...
, verified by a 5 s dielectric withstand test The maximum voltage that can be applied or output between any channel and COM without damaging the module or other devices. 18 | ni.com | NI 9401 Operating Instructions and Specifications...
• EN 61326 EMC requirements; Industrial Immunity • EN 55011 Emissions; Group 1, Class A • CE, C-Tick, ICES, and FCC Part 15 Emissions; Class A 20 | ni.com | NI 9401 Operating Instructions and Specifications...
Our Environmental Impact web page at ni.com/environment This page contains the environmental regulations and directives with which NI complies, as well as other environmental information not included in this document. 24 | ni.com | NI 9401 Operating Instructions and Specifications...
United States, visit the Worldwide Offices section of to access the branch office Web ni.com/niglobal sites, which provide up-to-date contact information, support phone numbers, email addresses, and current events. 26 | ni.com | NI 9401 Operating Instructions and Specifications...
Page 28
LabVIEW, National Instruments, NI, ni.com, the National Instruments corporate logo, and the Eagle logo are trademarks of National Instruments Corporation. Refer to the Trademark Information at ni.com/trademarks for other National Instruments trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies.
Need help?
Do you have a question about the NI 9401 and is the answer not in the manual?
Questions and answers