Table 4. RS-485/422/232 Serial Port Pin Descriptions (Continued)
Pin
RS-485/422 Mode
RS-232 Mode
3
TXD+
Unused
4
No Connect
No Connect
5
No Connect
No Connect
6
RXD-
GND
7
RXD+
Unused
8
Unused
TXD
9
Unused
RXD
10
GND
GND
Related Information
Serial Port Configuration Submenu
on page 21
VGA Port
Use the VGA port to connect a monitor to the IC-3121. Use any standard 15-pin VGA cable to
access the VGA port. The VGA port has a maximum resolution of 1920 x 1200 at 60 Hz.
Figure 7. VGA Port Pin Locations
5
15
11
6
1
10
Pin
Signal Name
Signal Description
1
RED
Red analog video signal
2
GREEN
Green analog video signal
3
BLUE
Blue analog video signal
4
RESERVED
Reserved
5
GND
Ground reference
6
RED RETURN
Ground reference
IC-3121 User Manual
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© National Instruments
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