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NI myRIO-1900 User Guide and Specifications
The following figure and table show the signals on Mini System Port (MSP) connector C. Note
that some pins carry secondary functions as well as primary functions.
Figure 4.
Primary/Secondary Signals on MSP Connector C
Table 2.
Descriptions of Signals on MSP Connector C
Signal Name
Reference
Direction
Description
+15V/-15V
AGND
Output
+15 V/-15 V power output.
AI0+/AI0-;
AI1+/AI1-
AGND
Input
±10 V, differential analog input
channels. Refer to the
Analog Input
Channels
section for more information.
AO <0..1>
AGND
Output
±10 V referenced, single-ended analog
output channels. Refer to the
Analog
Output Channels
section for more
information.
AGND
N/A
N/A
Reference for analog input and output
and +15 V/-15 V power output.
+5V
DGND
Output
+5 V power output.
DIO <0..7>
DGND
Input or
Output
General-purpose digital lines with
3.3 V output, 3.3 V/5 V-compatible
input. Refer to the
DIO Lines
section for
more information.
DGND
N/A
N/A
Reference for digital lines and +5 V
power output.
DGND
DIO7 / PWM1
DIO6 / ENC1.B
DIO5
DIO4 / ENC1.A
DIO2 / ENC0.B
DIO
3
/ PWM0
DIO0 / ENC0.A
AI1+
AI0–
A
GND
A
O0
A
GND
+15
V
5
V
DIO1
AI1–
AI0+
A
O1
–15
V
1
8
17
20
19
16
15
14
1
3
12
10 11
9
8
7
6
5
4
3
2
1
AUDIO
IN
AUDIO
OUT