NI NI-9205 User manual

NI-9205
Getting Started
2023-04-19

Contents
NI-9205 Getting Started. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
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NI-9205 Getting Started

NI-9205 Getting Started
Connector Types
The NI-9205 has more than one connector type: NI-9205 with spring terminal and
NI-9205 with DSUB. Unless the connector type is specified, NI-9205 refers to all
connector types.
The NI-9205 with spring terminal is available in two types: push-in spring terminal
and spring terminal. The push-in type spring terminal connector is black and
orange. The spring terminal connector is black. NI-9205 with spring terminal refers
to both types unless the two types are specified. Dierences between the two types
of spring terminal connectors are noted by the connector color.
NI-9205 Block Diagram
The NI-9205 channels share a common ground (COM) that is isolated from other
modules in the system. All channels share a programmable gain instrumentation
amplifier and are multiplexed to an ADC. Each channel also has ±30 V overvoltage
protection.
AI+
AI–
COM
AISENSE
NI 9205
Trigger Trig
Filtered
Differential
Amplifier
16-bit
Isolated
ADC
ADC
MUX PGIA
NI-9205 with Spring Terminal (Black Connector)
Pinout
© National Instruments 3
NI-9205 Getting Started

AI0
AI1
AI2
AI3
AI4
AI5
AI6
AI7
AI16
AI17
AI18
AI19
AI20
AI21
AI22
AI23
COM
DO0
AI8
AI9
AI10
AI11
AI12
AI13
AI14
AI15
AI24
AI25
AI26
AI27
AI28
AI29
AI30
AI31
AISENSE
PFI0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
Table 1. Signal Descriptions
Signal Description
AI Analog input signal connection
AISENSE Reference connection for NRSE measurements
COM Common reference connection to isolated
ground
DO Digital output signal connection
PFI Programmable function interface, digital input
signal connection
NI-9205 with Push-in Style Spring Terminal (Black/
Orange Connector) Pinout
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NI-9205 Getting Started

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
AI9
AI8
AI10
AI12
AI14
AI24
AI26
AI28
AI30
AISENSE
AI11
AI13
AI15
AI25
AI27
AI29
AI31
PFI0
AI0
AI1
AI3
AI5
AI7
AI17
AI19
AI21
AI23
DO0
AI2
AI4
AI6
AI16
AI18
AI20
AI22
COM
Table 2. Signal Descriptions
Signal Description
AI Analog input signal connection
AISENSE Reference connection for NRSE measurements
COM Common reference connection to isolated
ground
DO Digital output signal connection
PFI Programmable function interface, digital input
signal connection
NI-9205 with DSUB Pinout
© National Instruments 5
NI-9205 Getting Started

AI8
AI9
AI10
AI11
AI12
AI13
AI14
AI15
PFI0
COM
AI24
AI25
AI26
AI27
AI28
AI29
AI30
AI31
AI0
AI1
AI2
AI3
AI4
AI5
AI6
AI7
DO0
COM
AI16
AI17
AI18
AI19
AI20
AI21
AI22
AI23
AISENSE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
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34
35
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Table 3. Signal Descriptions
Signal Description
AI Analog input signal connection
AISENSE Reference connection for NRSE measurements
COM Common reference connection to isolated
ground
DO Digital output signal connection
PFI Programmable function interface, digital input
signal connection
NI-9205 Signals
You can connect single-ended or dierential signals to the NI-9205; use a dierential
measurement configuration to attain more accurate measurements and less noise.
Specific signal pairs are valid for dierential connections.
The following table shows the signal pairs that are valid for dierential connection
configurations with the NI-9205.
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NI-9205 Getting Started

Table 4. NI-9205 Dierential Pairs
Channel AI+ AI-
0 AI0 AI8
1 AI1 AI9
2 AI2 AI10
3 AI3 AI11
4 AI4 AI12
5 AI5 AI13
6 AI6 AI14
7 AI7 AI15
16 AI16 AI24
17 AI17 AI25
18 AI18 AI26
19 AI19 AI27
20 AI20 AI28
21 AI21 AI29
22 AI22 AI30
23 AI23 AI31
Connecting Grounded Di󽗿erential Signals
You can connect grounded dierential signals to the NI-9205.
NI 9205
MUX ADC
PGIA
Vcm
AI0 (CH0+)
AI8 (CH0–)
AI1 (CH1+)
AI9 (CH1–)
COM
V1
V2
–
–
+
+
© National Instruments 7
NI-9205 Getting Started

In a dierential configuration, the NI-9205 rejects the common-mode noise voltage
during the measurement of V1. To connect grounded dierential signals to the
NI-9205, you must also connect the signal reference to COM.
Connecting Floating Di󽗿erential Signals
You can connect floating dierential signals to the NI-9205.
NI 9205
MUX ADC
PGIA
Vcm
AI0 (CH0+)
AI8 (CH0–)
–
–
AI1 (CH1+)
AI9 (CH1–)
COM
V1
V2+
+
–
–
To connect floating dierential signals to the NI-9205, you must connect the
negative signal to COM through a 1 MΩ resistor to keep the voltage within the
maximum working voltage. If the voltage source is outside the maximum working
voltage, the NI-9205 does not read data accurately.
Connecting RSE Voltage Signals
You can connect referenced single-ended (RSE) signals to the NI-9205.
NI 9205
MUX
PGIA ADC
V1
V2
COM
AI1
AI0
–
–
+
+
In an RSE configuration, the NI-9205 measures each channel with respect to COM. To
connect RSE signals to the NI-9205, you must connect the voltage ground signal to
COM to keep the maximum working voltage in the specified range.
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NI-9205 Getting Started

Note If you leave COM unconnected, the signals float outside the working
input range of the NI-9205. This may result in unreliable measurements
because there is no way to ensure that the input signal is within 10 V of
COM.
Connecting NRSE Voltage Signals
You can connect non-referenced single-ended (NRSE) signals to the NI-9205.
NI 9205
MUX
PGIA ADC
V1
V2
COM
AI1
AISENSE
AI0
+
+
–
–
In an NRSE configuration, the NI-9205 measures each channel with respect to
AISENSE. An NRSE configuration provides remote sense for the negative input of
the PGIA that is shared by all channels and also provides improved noise rejection
compared to an RSE connection.
Connecting to Wires to the NI-9205 with Spring
Terminal (Black Connector)
What to Use
■NI-9205 with spring terminal (black connector)
■ 0.08 mm2 to 1.0 mm2 (28 AWG to 18 AWG) copper conductor wire with 7 mm
(0.28 in.) of insulation stripped from the end
■Flathead screwdriver with a 2.3 mm x 1.0 mm (0.09 in. x 0.04 in.) blade,
included with the NI-9205
© National Instruments 9
NI-9205 Getting Started

What to Do
1 2 3
1. Insert the screwdriver into a spring clamp activation slot to open the
corresponding connector terminal.
2. Press a wire into the open connector terminal.
3. Remove the screwdriver from the activation slot to clamp the wire into place.
Connecting Wires to the NI-9205 with Push-in Style
Spring Terminal (Black/Orange Connector)
What to Use
■NI-9205 with DSUB (black/orange connector)
■0.13 mm2 to 1.5 mm2 (26 AWG to 16 AWG) copper conductor wire with
10 mm (0.394 in.) of insulation stripped from the end
■Ferules (optional)
What to Do
Refer to the following table for how to insert a wire into a terminal depending on
what type of wire you are using or if you are using a ferrule.
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NI-9205 Getting Started