National Instruments 9146, Operating Instructions And Specifications

NI 9146 Operating Instructions and Specifications

12

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Wiring Power to the Chassis

The NI 9146 requires an external power supply that meets the 
specifications in the 

Power Requirements

 section. The NI 9146 filters and 

regulates the supplied power and provides power for all of the I/O modules. 
The NI 9146 has one layer of reverse-voltage protection. Complete the 
following steps to connect a power supply to the chassis.

1.

Ensure that the power supply is turned off.

Caution

Do 

not

 install or remove the power connector from the front panel of the NI 9146 

while power is applied.

2.

Connect the positive lead of the power supply to the V terminal of the 
COMBICON power connector shipped with the NI 9146, and tighten 
the terminal screw. Figure 13 shows the terminal screws, which secure 
the wires in the screw terminals, and the connector screws, which 
secure the power connector on the front panel.

Figure 13.  

COMBICON Power Connector

3.

Connect the negative lead of the power supply to the C terminal of the 
power connector and tighten the terminal screw.

4.

Install the power connector on the front panel of the NI 9146 and 
tighten the connector screws.

5.

Turn on the power supply.

Powering On the NI 9146

When you apply power to the NI 9146, the chassis 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. If the LEDs do not 
behave in this way when the system powers on, refer to the 

Understanding 

LED Indications

 section.

1

Terminal Screws

2

Connector Screws

C

V

2

2

1