3. Optionally, you can connect the positive lead of another power supply to the other V
terminal and the negative lead to one of the C terminals. You must install the ferrite
across both pairs of wires.
4. Install the power connector on the front panel of the cRIO-9012/9014 and tighten the
connector screws.
Note The controller draws power from either V1 or V2 depending on which
terminal has a higher voltage. It does not draw power from both terminals. The
controller switches between V1 and V2 without affecting operation.
Caution The C terminals are internally connected to each other. If you use
two power supplies, make sure that they share a common ground.
Caution The C terminals are internally connected to the controller chassis to
prevent a faulty ground connection from causing the chassis ground to float. If
you reverse the input voltage, the positive input voltage is connected directly to
the chassis. The controller has built-in reversed-voltage protection, but reversed
voltage can damage connected peripherals if the chassis ground is not reliably
connected to earth ground.
Caution Do not tighten or loosen the terminal screws on the power connector
while the power connector is plugged into the controller or while the power
supply is on.
Powering On the cRIO-9012/9014
When you apply power to the cRIO-9012/9014, the controller runs a power-on self test
(POST). During the POST, the Power and Status LEDs turn on. The Status LED turns off,
indicating that the POST is complete.
You can configure the cRIO-9012/9014 to launch an embedded stand-alone application each
time you boot the controller.
Connecting Serial Devices to the
cRIO-9012/9014
The cRIO-9012/9014 has an RS-232 serial port to which you can connect devices such as
displays or input devices. Use the Serial VIs to read from and write to the serial port from a
LabVIEW Real-Time application. For more information about the Serial VIs, refer to the
LabVIEW Help.
Figure 5. Controller Serial Port
NI cRIO-9012/9014 User Manual and Specifications | © National Instruments | 7
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