Operating instructions

NI cRIO-9030 Operating Instructions and Specifications | © National Instruments | 9
Grounding the Chassis
You must connect the chassis grounding terminal to the grounding electrode system of the
facility. Complete the following steps to ground the chassis:
1. Attach a ring lug to a 1.31 mm
2
(16 AWG) or larger wire.
2. Remove the grounding screw from the grounding terminal on the front of the chassis. Refer
to Figure 1 for the location of the grounding screw.
3. Attach the ring lug to the grounding terminal.
4. Tighten the grounding screw to 0.5 N · m (4.4 lb · in.) of torque.
5. Attach the other end of the wire to the grounding electrode system of your facility using a
method appropriate for the application.
Caution 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 1.3 mm
2
(16 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, go to ni.com/info and enter the Info Code
emcground.
Wiring Power to the cRIO Controller
The cRIO controller requires a 9 to 30 V external power supply that meets the specifications in
the Power Requirements section. Some suggested NI power supplies are listed in Table 8. The
cRIO-9030 filters and regulates the supplied power and provides power for the I/O modules.
The cRIO-9030 has a primary power input, V1, and a secondary power input, V2. The POWER
LED on the front panel identifies the power input in use. When the LED is lit green, V1 is in use.
When the LED is lit yellow, V2 is in use.
If you apply power to both the V1 and V2 inputs, the controller operates from the V1 input. If
the input voltage to V1 is insufficient, the controller operates from the V2 input.
The cRIO-9030 has reverse-voltage protection.
Caution Do not connect V2 to a DC mains supply or to any supply requiring a
connecting cable longer than 3 m (10 ft). A DC mains supply is a local DC electricity
supply network in the infrastructure of a site or building.
Complete the following steps to connect a power supply to the controller.
1. Ensure the power source is turned off.
2. Install the ferrite, (National Instruments part number 711849-01, included in the shipping
kit) across the negative and positive leads of the power source, approximately 50 to 75 mm
(2 to 3 in.) from the end of the power input wires, as shown in Figure 3.