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Chapter 1
Getting Started with the cDAQ Chassis
NI cDAQ Chassis Features
The cDAQ chassis features many ports, DIP switches, LEDs, a RESET button, and a power
button. Refer to Figure 1-1 for the locations of these features on the cDAQ chassis.
Video (VGA) Port
The cDAQ chassis video (VGA) port, shown in Figure 1-1, outputs graphics using VESA
standard VGA analog signaling. Use this port to connect a monitor to program the
NI cDAQ-9138/9139 for Windows. Table 1-3 lists the video port pin locations and VGA
signals.
Caution
Do
not
hot-swap VGA devices while the cDAQ chassis is in a hazardous
location or connected to high voltages.
Table 1-3.
Video Port Pin Locations
Pinout
Pin
Signal Name
Signal Description
1
RED
Red analog video signal
2
GREEN
Green analog video signal
3
BLUE
Blue analog video signal
4
No Connect
—
5
GND
Ground reference
6
RED RETURN
Ground reference
7
GREEN RETURN
Ground reference
8
BLUE RETURN
Ground reference
9
PWR
5 V power for DDC
10
GND
Ground return for power
11
No Connect
—
12
DDC_D
Data signal of serial communication
13
HSYNC
Horizontal synchronization signal
14
VSYNC
Vertical synchronization signal
15
DDC_C
Clock signal of serial communication
11
12
1
3
14
15
1
2
3
4
5
6
7
8
9
10