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GETTING STARTED GUIDE NI 9478 16 DO, 0 V to 50 V, Sinking, 50 μs hnology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www...
This document explains how to connect to the NI 9478. Before you begin, complete the software and Note hardware installation procedures in your chassis documentation. The guidelines in this document are specific to Note the NI 9478. The other components in the system might not meet the same safety ratings.
CAT III, or CAT IV. Safety Guidelines for Hazardous Locations The NI 9478 is suitable for use in Class I, Division 2, Groups A, B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC T4 and Ex nA IIC T4 hazardous locations; and nonhazardous locations only.
This product was tested and complies with the regulatory requirements and limits for electromagnetic compatibility (EMC) stated in the product specifications. These requirements and 6 | ni.com | NI 9478 Getting Started Guide hnology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www...
EMC performance is attained. Preparing the Environment Ensure that the environment in which you are using the NI 9478 meets the following specifications. Operating temperature -40 °C to 70 °C...
Connecting Digital Devices You can connect a variety of industrial devices, such as solenoids, motors, actuators, relays, and lamps to the NI 9478. You must connect an external power supply to the NI 9478. The power supply provides the current for the output channels.
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Vsup and COM pins is powered on. Ensure that the devices you connect to the NI 9478 are compatible with the output specifications of the NI 9478. Refer to the device datasheet at ni.com/manuals...
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NI 9478. The heat dissipated increases with higher switching frequencies, higher currents, and longer cables. Reducing Cable Length The effective cable length is the total distance from DO to COM.
Figure 4. Cable Length of the NI 9478 with a Capacitor and Diode Vsup Load Cable Clamp External Power – Supply Cable Length NI 9478 NI recommends that you use a capacitor with a Note capacitance of at least 20 µF.
You can review the output status in software to determine if the current has exceeded the limit threshold. You can configure each channel on the NI 9478 to disable the output that exceeds the current limit threshold. Some applications require a large inrush current that may exceed the current limit threshold.
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NI recommends using 2 meters of cable for safe operating conditions. Higher currents, higher frequencies, and longer cables contribute to increased heat in the NI 9478. Refer to the device datasheet at ni.com/manuals for safe operating conditions.
+ 0.04 % 1.25 + 1 20 = 14.8 % Example Two The NI 9478 is on and passing 3 A of current through 2.0 meters of cable for 0.25 seconds. The channel passes 1.25 A of current at 20 kHz for 1.25 seconds. The channel then drives the load off for 4 seconds.
LabVIEW Help RELATED INFORMATION C Series Documentation Services & Resources ni.com/services ni.com/info cseriesdoc Located at ni.com/manuals Installs with the software 20 | ni.com | NI 9478 Getting Started Guide hnology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www...
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