©
National Instruments Corporation
3
NI USB-6008/6009 User Guide and Specifications
Floating Signal Sources ....................................................................................................... 12
Ground-Referenced Signal Sources..................................................................................... 13
Taking Differential Measurements ...................................................................................... 14
Taking Referenced Single-Ended Measurements................................................................ 15
Source/Sink Information.............................................................................................................. 18
I/O Protection............................................................................................................................... 19
Power-On States .......................................................................................................................... 19
Static DIO .................................................................................................................................... 19
Specifications....................................................................................................................................... 20
Where to Go from Here ....................................................................................................................... 27
Safety Guidelines
Operate the NI USB-6008/6009 device only as described in this user guide.
Caution
Do
not
operate the NI USB-6008/6009 in a manner not specified in this document. Misuse
of the device can result in a hazard. You can compromise the safety protection built into the device if
the device is damaged in any way. If the device is damaged, contact National Instruments for repair.
Caution
Do
not
substitute parts or modify the device except as described in this document. Use the
device only with the chassis, modules, accessories, and cables specified in the installation
instructions. You must have all covers and filler panels installed during operation of the device.
Caution
Do
not
operate the device in an explosive atmosphere or where there may be flammable
gases or fumes. If you must operate the device in such an environment, it must be in a suitably rated
enclosure.
Electromagnetic Compatibility Guidelines
This product was tested and complies with the regulatory requirements and limits for electromagnetic
compatibility (EMC) as stated in the product specifications. These requirements and limits are designed
to provide reasonable protection against harmful interference when the product is operated in its
intended operational electromagnetic environment.
This product is intended for use in industrial locations. There is no guarantee that harmful interference
will not occur in a particular installation, when the product is connected to a test object, or if the product
is used in residential areas. To minimize the potential for the product to cause interference to radio and
