Getting Started With X Series Usb Devices; Usb Device Chassis Ground - National Instruments PCIe-6323 User Manual

Getting Started with X Series USB Devices

The following sections contain information about X Series USB device best practices and
features.

USB Device Chassis Ground

xx
(NI USB-63 Screw Terminal Devices)
Terminal X Series device must be connected to earth ground through the chassis ground.
The wire should be AWG 16 or larger solid copper wire with a maximum length of 1.5 m (5 ft).
Attach the wire to the earth ground of the facility's power system. For more information about
earth ground connections, refer to the document, Grounding for Test and Measurement Devices,
by going to
ni.com/info
You can attach and solder a wire to the chassis ground lug of the USB X Series device, as shown
in Figure 1-1. The wire should be as short as possible.
Figure 1-1. Grounding an NI Screw Terminal USB-63x x Device through
(NI USB-63xx BNC Devices)
NI BNC USB-63xx device. Use as short a wire as possible. In addition, the wires in the shielded
cable that extend beyond the shield should be as short as possible.
Note (NI USB-636
X Series devices have chassis ground connection through the I/O connector.
For EMC compliance, the chassis of the USB Screw
and entering the Info Code
the Chassis Ground Lug
You can attach a wire to a CHS GND screw terminal of any
x
Mass Termination Devices)
.
emcground
USB Mass Termination
© National Instruments | 1-5
X Series User Manual