Operating instructions

34 | ni.com | NI cRIO-9030 Operating Instructions and Specifications

SD Card Slot Cover

You must use the SD card slot cover to protect the SD card in hazardous locations. Do not

remove an SD card while either LED is flashing or lit because file corruption may result.

Caution Removing the SD card while the IN USE LED is lit might result in

incomplete or lost data.

Note Screw the slot cover closed completely. Tighten the captive screws to a

maximum torque of 0.75 N ·

m (6.7 lb · in.) using a #1 Phillips screwdriver. Do not

overtighten.

USER1 Button

The general-purpose USER1 button is user-defined. You can read the state of the USER1 button

from your LabVIEW FPGA application.

Chassis Grounding Screw

For EMC compliance, the cRIO controller must be connected to earth ground through the chassis

ground, shown in Figure 1.

The wire should be 1.31 mm

(16 AWG) 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. Go to

ni.com/info

and enter the Info Code emcground for more information about earth ground connections.

Note If you use shielded cabling to connect to a C Series I/O module with a plastic

connector, you must attach the cable shield to the chassis grounding terminal using

1.31 mm

(16 AWG) or larger wire. Use shorter wire for better EMC performance.

CMOS Battery and CMOS Reset Button

The cRIO controller contains a CMOS battery, a lithium cell battery that stores the system clock

information when the controller is powered off. There is only a slight drain on the CMOS battery

when power is applied to the cRIO controller power connector. The rate at which the CMOS

battery drains when power is disconnected depends on the ambient storage temperature. For

longer battery life, store the cRIO controller at a cooler temperature, and apply power to the

power connector. Refer to the CMOS Battery section in the specifications of this document for

the expected battery lifetime.

The

CMOS BATTERY IS DEAD warning appears onscreen during the power-on self test if the

battery is dead and Console Out is enabled. The controller still starts, but the system clock is

reset to the date and time of the BIOS release. The battery is not user replaceable. If you need to

replace the CMOS battery, contact National Instruments.