Internal Real-Time Clock; Battery; File System - NI cRIO-9066 User Manual

For EMC compliance, you must connect the cRIO-9066 to earth ground through the chassis
ground screw. Use wire that is 2.1 mm
of 1.5 m (5 ft). Attach the wire to the earth ground of the electrode system of the facility.
Caution
connector, you must attach the cable shield to the chassis grounding terminal using
2
2.1 mm (14 AWG) or larger wire. Attach a ring lug to the wire and attach the wire
to the chassis grounding terminal. Solder the other end of the wire to the cable
shield. Use shorter wire for better EMC performance.
For more information about ground connections, visit
.
emcground

Internal Real-Time Clock

The cRIO-9066 contains an internal real-time clock that maintains system time when the
cRIO-9066 is powered off. The system clock of the cRIO-9066 is synchronized with the
internal real-time clock at startup. You can set the real-time clock using MAX, or you can set
the clock programmatically using LabVIEW.
Refer to the specifications on

Battery

The cRIO-9066 contains a lithium cell battery that stores the system clock information when
the cRIO-9066 is powered off. There is only a slight drain on the battery when power is
applied to the cRIO-9066 power connector. The rate at which the battery drains when power is
disconnected depends on the ambient storage temperature. For longer battery life, store the
cRIO-9066 at a cooler temperature and apply power to the power connector. Refer to the
specifications on ni.com/manuals
The battery is not user-replaceable. If you need to replace the battery, contact NI. Refer to the
specifications on ni.com/manuals

File System

LabVIEW mounts USB devices to the
links , , , or
/u /v /w
any file corruption to external storage devices, verify that any file IO operations with the
specific drive finish before removing the device. Refer to the LabVIEW Help for more
information.
The file system of the cRIO-9066 follows conventions established for UNIX-style operating
systems. Other LabVIEW Real-Time targets follow Microsoft Windows-style conventions. In
order to facilitate the porting of applications from those targets, this target supports the
Windows-style home directory. This path is bound to the UNIX-style directory
/C
.
lvuser
Various LabVIEW Real-Time system files which would be accessible from
other LabVIEW Real-Time targets are found in different locations on this target.
UNIX-style file systems support the concept of a symbolic link, which allows access to a file
using an alternative file path. For example, it is possible to link
14 | ni.com | NI cRIO-9066 User Manual
2
If you use shielded cabling to connect to a C Series module with a plastic
ni.com/manuals
for the expected battery lifetime.
for information about battery disposal.
media/sdx1
to the media mount point, starting with
/x
(14 AWG) solid copper wire with a maximum length
ni.com/info
for the real-time clock accuracy specifications.
directory and creates symbolic
and enter the Info Code
if it is available. To prevent
/u
(or
C:
/C/ni-rt/system
/home/
) on
/C
, where