AUX I/O Connector
Table 3. NI 5791 AUX I/O Connector Pin Assignments
AUX I/O Connector Pin
Signal
Signal Description
18
16
14
12
10
8
6
4
2
19
17
1
3
5
7
9
11
13
15
1
DIO Port 0 (0) Bidirectional single-ended (SE) digital I/O (DIO)
data channel.
2
GND
Ground reference for signals.
3
DIO Port 0 (1) Bidirectional SE DIO data channel.
4
DIO Port 0 (2) Bidirectional SE DIO data channel.
5
GND
Ground reference for signals.
6
DIO Port 0 (3) Bidirectional SE DIO data channel.
7
DIO Port 1 (0) Bidirectional SE DIO data channel.
8
GND
Ground reference for signals.
9
DIO Port 1 (1) Bidirectional SE DIO data channel.
10 DIO Port 1 (2) Bidirectional SE DIO data channel.
11 GND
Ground reference for signals.
12 DIO Port 1 (3) Bidirectional SE DIO data channel.
13 PFI 0
Bidirectional SE DIO data channel.
14 NC
No connect.
15 PFI 1
Bidirectional SE DIO data channel.
16 PFI 2
Bidirectional SE DIO data channel.
17 GND
Ground reference for signals.
18 +5 V
+5 V power (10 mA maximum).
19 PFI 3
Bidirectional SE DIO data channel.
Caution
The AUX I/O connector accepts a standard, third-party HDMI cable, but
the AUX I/O port is not an HDMI interface. Do not connect the AUX I/O port on the
NI 5791 to the HDMI port of another device. NI is not liable for any damage
resulting from such signal connections.
8 | NI 5791R User Manual and Specifications | ni.com
