Operating instructions

cRIO-9022 Operating Instructions and Specifications 6 ni.com
Wiring Power to the Controller
Caution You must install the controller on a CompactRIO chassis and tighten the captive
screws before you apply power to the controller. Installing the controller while power is
applied to it can cause damage to the chassis.
The controller requires an external power supply that meets the
specifications in the Power Requirements section. The controller filters and
regulates the supplied power and provides power for all of the I/O modules
in the chassis. You must connect a power supply to at least one pair of
V and C terminals. Optionally, you can connect a power supply to the
other pair of V and C terminals. The controller draws power from the
power supply with the higher voltage. The controller has one layer of
reverse-voltage protection. Complete the following steps to connect a
power supply to the controller.
1. Install the ferrite shipped with the controller across the negative and
positive leads of the power supply, approximately 50–75 mm (2–3 in.)
from the ends of the leads near the controller. Refer to the following
figure for an illustration of this step.
Figure 4. Wiring Power to the Controller
2. Connect the positive lead of the power supply to the V1 or V2 terminal
of the COMBICON power connector shipped with the controller, and
tighten the terminal screw. Figure 5 shows the terminal screws, which
secure the wires in the screw terminals, and the connector screws,
which secure the power connector on the controller.