Page 3
Positive analog input signal connection Negative analog input signal connection Cable Requirements Select and install cables for the NI-9239 with BNC in accordance with the following EMC requirements: Install a clamp-on ferrite bead (NI part number 782801-01) on the BNC cable ■...
Page 4
Make sure the voltage on the AI+ and AI- connections are in the channel-to-earth safety voltage range to ensure proper operation. Floating Connections Signal Source – AI– NI 9239 NI-9239 Connection Guidelines Make sure that devices you connect to the NI-9239 are compatible with the ■ module specifications. ni.com...
Page 5
You must use 2-wire ferrules to create a secure connection when connecting ■ more than one wire to a single terminal on the NI-9239 with screw terminal. Wiring for High-Vibration Applications If your application is subject to high vibration, NI recommends that you follow these guidelines to protect connections to the NI-9239 with screw terminal: Use ferrules to terminate wires to the detachable connector.
Page 6
The small amount of variation in gain with respect to frequency is called the passband flatness. The digital filters of the NI-9239 adjust the frequency range of the passband to match the data rate. Therefore, the amount of gain or attenuation at a given frequency depends on the data rate.
Page 7
12.8 MHz, the result is data rates of 50 kS/s, 25 kS/s, 16.667 kS/s, and so on down to 1.613 kS/s, depending on the value of n. When using an external timebase with a frequency other than 12.8 MHz, the NI-9239 has a different set of data rates.
Need help?
Do you have a question about the NI-9239 and is the answer not in the manual?
Questions and answers