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National instruments bnc-2140 signal conditioning accy
NI / National Instruments BNC-2140 BNC Signal Conditioning Accessory
* Description: The National Instruments BNC-2140 is a signal conditioning accessory specifically designed for use with a dynamic signal acquisition (DSA) device. It interfaces four BNC signal inputs and two BNC signal outputs directly to National Instruments DSA products including the NI PCI-4451, NI PCI-4452, NI PCI-4551, and NI PCI-4552. The BNC-2140 connects to integrated circuit piezoelectric, also known as Integral Electronic Piezoelectric (IEPE), accelerometers, microphone preamplifiers, and other voltage sources with outputs of less than ±42.4 V.
Each input channel has an independent 4 mA current source suitable for use with IEPE-type accelerometers and microphone preamplifiers. You can
manually enable or disable the IEPE signal conditioning on a per-channel basis. With IEPE disabled, a BNC-2140 input channel acts as a direct voltage input. You can manually switch each input channel and each output channel from differential (DIFF) to single-ended (SE) mode. In SE mode, the BNC shell is connected to analog ground through a 50 Ω resistor. The BNC-2140 receives power for IEPE signal conditioning from the DSA
plug-in device through the 68-pin high-density connector. A green LED indicates when the IEPE circuitry is powered on. When IEPE signal conditioning is not required, you can manually power off the circuits.
* Working Condition: Presumed Good but Untested
* Other Comments / Notes: The user manual can be downloaded here: http:// /pdf/manuals/321933d.pdf
* Warranty: Rest assured that your purchase includes a 3-day DOA Guarantee. If the item is DOA, you will need to notify us within 3-days of receipt. Item(s) must be returned in the same condition as received within 7 days of receipt. (See below for further details).
We strongly recommend that you properly pack and insure the package against loss or damage. It is ultimately your responsibility that your returned product arrives at our location within the allotted return time frame in the same condition it was sent.
