Analog Input; Connecting Single-Ended Voltage Signals - National Instruments R Series User Manual
For usb multifunction rio with kintex-7 160t fpga
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Also See for R Series:
- User manual (72 pages) ,
- Getting started manual (12 pages) ,
- Getting started manual (8 pages)
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Connector 0
AI0+
AIGND
AI1+
AIGND
AI2+
AIGND
AI3+
AIGND
AI4+
AIGND
AI5+
AIGND
AI6+
AIGND
AI7+
AIGND
AOGND
AOGND
AOGND
AOGND
AOGND
AOGND
AOGND
AOGND
+5V
Analog Input
The NI USB-7846R OEM device provides connections for eight AI channels. Each channel
has an AI+ pin, AI- pin, and AIGND pin to which you can connect both single-ended or
differential voltage signals. Use the AISENSE pin to connect non-referenced single-ended
signals.
Connecting Single-Ended Voltage Signals
To connect referenced single-ended voltage signals to the NI USB-7846R OEM device, you
must connect the voltage ground signal to AI GND in order to keep the common-mode voltage
in the specified range, as shown in Figure 3.
Figure 3. Connecting Referenced Single-Ended Signals to the NI USB-7846R OEM
+
V
1
–
Figure 2. NI USB-7846R OEM Device Pinout
Connector 1
DIO0
1
DIO1
3
DIO2
5
DIO3
7
DIO4
9
10
DIO5
11
12
DIO6
13
14
DIO7
15
16
DIO8
17
18
DIO9
19
20
DIO10
21
22
DIO11
23
24
DIO12
25
26
DIO13
27
28
AI0-
DIO14
1
2
29
30
3
4
AIGND
DIO15
31
32
5
6
AI1-
GND
33
34
7
8
AIGND
AI2-
9
10
AIGND
11
12
13
14
AI3-
15
16
AIGND
17
18
AI4-
19
20
AIGND
AI5-
21
22
23
24
AIGND
25
26
AI6-
27
28
AIGND
29
30
AI7-
31
32
AISENSE
33
34
AO0
35
36
AO1
37
38
AO2
39
40
AO3
41
42
AO4
43
44
AO5
45
46
AO6
47
48
AO7
49
50
+5V
AI+
AI–
AISENSE
AIGND
GND
2
GND
4
6
GND
9
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
Device
Overvoltage
Protection
Overvoltage
Protection
Overvoltage
Protection
NI USB-7846R OEM User Manual | © National Instruments | 7
Connector 2
DIO0
GND
1
2
DIO1
GND
3
4
DIO2
5
6
GND
DIO3
7
9
GND
DIO4
GND
9
10
DIO5
GND
11
12
DIO6
GND
13
14
DIO7
15
16
GND
DIO8
GND
17
18
DIO9
GND
19
20
DIO10
GND
21
22
DIO11
23
24
GND
DIO12
GND
25
26
DIO13
GND
27
28
DIO14
GND
29
30
DIO15
GND
31
32
GND
GND
33
34
Connector 3
DIO0
GND
1
2
DIO1
3
4
GND
DIO2
5
6
GND
DIO3
GND
7
9
DIO4
GND
9
10
DIO5
GND
11
12
DIO6
13
14
GND
DIO7
GND
15
16
DIO8
GND
17
18
DIO9
GND
19
20
DIO10
21
22
GND
DIO11
GND
23
24
DIO12
GND
25
26
DIO13
GND
27
28
DIO14
29
30
GND
DIO15
GND
31
32
GND
GND
33
34
PGIA
ADC
NI USB-7846R OEM
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