National Instruments NI 9205 User manual

GETTING STARTED GUIDE
NI 9205
16 AI Differential/32 AI Single-Ended, ±200 mV
to ±10 V, 16 Bit, 250 kS/s Aggregate

This document explains how to connect to the NI 9205.
Note Before you begin, complete the software and
hardware installation procedures in your chassis
documentation.
Note The guidelines in this document are specific to
the NI 9205. The other components in the system might
not meet the same safety ratings. Refer to the
documentation for each component in the system to
determine the safety and EMC ratings for the entire
system.
Safety Guidelines
Operate the NI 9205 only as described in this document.
Caution Do not operate the NI 9205 in a manner not
specified in this document. Product misuse can result in
a hazard. You can compromise the safety protection
built into the product if the product is damaged in any
way. If the product is damaged, return it to NI for
repair.
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Hazardous Voltage This icon denotes a warning
advising you to take precautions to avoid electrical
shock with the NI 9205 with spring terminal .
Safety Voltages
Connect only voltages that are within the following limits:
Maximum voltage1
Channel-to-COM ±30 VDC
NI 9205 with Spring Terminal Isolation Voltages
Channel-to-channel None
Channel-to-earth ground2
Continuous 250 Vrms, Measurement
Category II
Withstand 2,300 Vrms, verified by a 5 s
dielectric withstand test
1The maximum voltage that can be applied or output between AI and COM
without creating a safety hazard.
2This specification is valid only up to 2,000 m.
NI 9205 Getting Started Guide | © National Instruments | 3

Measurement Category II is for measurements performed on
circuits directly connected to the electrical distribution system.
This category refers to local-level electrical distribution, such as
that provided by a standard wall outlet, for example, 115 V for
U.S. or 230 V for Europe.
Caution Do not connect the NI 9205 to signals or use
for measurements within Measurement Categories III
or IV.
NI 9205 with DSUB Isolation Voltages
Channel-to-channel None
Channel-to-earth ground
Continuous 60 VDC, Measurement
Category I
Withstand
up to 2,000 m 1,000 Vrms, verified by a 5 s
dielectric withstand test
up to 5,000 m 500 Vrms, verified by a 5 s
dielectric withstand test
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Measurement Category I is for measurements performed on
circuits not directly connected to the electrical distribution system
referred to as MAINS voltage. MAINS is a hazardous live
electrical supply system that powers equipment. This category is
for measurements of voltages from specially protected secondary
circuits. Such voltage measurements include signal levels, special
equipment, limited-energy parts of equipment, circuits powered
by regulated low-voltage sources, and electronics.
Caution Do not connect the NI 9205 to signals or use
for measurements within Measurement Categories II,
III, or IV.
Safety Guidelines for Hazardous Voltages
You can connect hazardous voltages only to the
NI 9205 with spring terminal . Do not connect hazardous
voltages to the NI 9205 with DSUB.
If hazardous voltages are connected to the device, take the
following precautions. A hazardous voltage is a voltage greater
than 42.4 Vpk voltage or 60 VDC to earth ground.
NI 9205 Getting Started Guide | © National Instruments | 5

Caution Ensure that hazardous voltage wiring is
performed only by qualified personnel adhering to local
electrical standards.
Caution Do not mix hazardous voltage circuits and
human-accessible circuits on the same module.
Caution Ensure that devices and circuits connected to
the module are properly insulated from human contact.
Caution When module terminals are hazardous
voltage LIVE (>42.4 Vpk/60 VDC), you must ensure
that devices and circuits connected to the module are
properly insulated from human contact. You must use
the NI 9940 connector backshell kit to ensure that the
terminals are not accessible.
Note You can use the NI 9940 only with the NI 9205
with spring terminal.
Safety Guidelines for Hazardous Locations
The NI 9205 is suitable for use in Class I, Division 2, Groups A,
B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC T4
and Ex nA IIC T4 hazardous locations; and nonhazardous
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locations only. Follow these guidelines if you are installing the
NI 9205 in a potentially explosive environment. Not following
these guidelines may result in serious injury or death.
Caution Do not disconnect I/O-side wires or
connectors unless power has been switched off or the
area is known to be nonhazardous.
Caution Do not remove modules unless power has
been switched off or the area is known to be
nonhazardous.
Caution Substitution of components may impair
suitability for Class I, Division 2.
Caution For Division 2 and Zone 2 applications,
install the system in an enclosure rated to at least IP54
as defined by IEC/EN 60079-15.
Caution For Division 2 and Zone 2 applications,
connected signals must be within the following limits.
Capacitance 0.2 µF maximum
NI 9205 Getting Started Guide | © National Instruments | 7

Special Conditions for Hazardous Locations Use
in Europe and Internationally
The NI 9205 has been evaluated as Ex nA IIC T4 Gc equipment
under DEMKO Certificate No. 03 ATEX 0324020X and is
IECEx UL 14.0089X certified. Each NI 9205 is marked II 3G
and is suitable for use in Zone 2 hazardous locations, in ambient
temperatures of -40 °C ≤ Ta ≤ 70 °C. If you are using the NI 9205
in Gas Group IIC hazardous locations, you must use the device in
an NI chassis that has been evaluated as Ex nC IIC T4, Ex IIC
T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.
Caution You must make sure that transient
disturbances do not exceed 140% of the rated voltage.
Caution The system shall only be used in an area of
not more than Pollution Degree 2, as defined in
IEC 60664-1.
Caution The system shall be mounted in an
ATEX/IECEx-certified enclosure with a minimum
ingress protection rating of at least IP54 as defined in
IEC/EN 60079-15.
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Caution The enclosure must have a door or cover
accessible only by the use of a tool.
Electromagnetic Compatibility Guidelines
This product was tested and complies with the regulatory
requirements and limits for electromagnetic compatibility (EMC)
stated in the product specifications. These requirements and
limits provide reasonable protection against harmful interference
when the product is operated in the intended operational
electromagnetic environment.
This product is intended for use in industrial locations. However,
harmful interference may occur in some installations, when the
product is connected to a peripheral device or test object, or if the
product is used in residential or commercial areas. To minimize
interference with radio and television reception and prevent
unacceptable performance degradation, install and use this
product in strict accordance with the instructions in the product
documentation.
NI 9205 Getting Started Guide | © National Instruments | 9

Furthermore, any changes or modifications to the product not
expressly approved by National Instruments could void your
authority to operate it under your local regulatory rules.
Special Conditions for Marine Applications
Some products are Lloyd’s Register (LR) Type Approved for
marine (shipboard) applications. To verify Lloyd’s Register
certification for a product, visit ni.com/certification and search
for the LR certificate, or look for the Lloyd’s Register mark on
the product.
Caution In order to meet the EMC requirements for
marine applications, install the product in a shielded
enclosure with shielded and/or filtered power and
input/output ports. In addition, take precautions when
designing, selecting, and installing measurement probes
and cables to ensure that the desired EMC performance
is attained.
10 | ni.com | NI 9205 Getting Started Guide

Preparing the Environment
Ensure that the environment in which you are using the NI 9205
meets the following specifications.
Operating temperature
(IEC 60068-2-1, IEC 60068-2-2)
-40 °C to 70 °C
Operating humidity
(IEC 60068-2-78)
10% RH to 90% RH,
noncondensing
Pollution Degree 2
Maximum altitude
NI 9205 with spring
terminal
2,000 m
NI 9205 with DSUB 5,000 m
Indoor use only.
Note Refer to the device datasheet on ni.com/manuals
for complete specifications.
NI 9205 Getting Started Guide | © National Instruments | 11

Connecting the NI 9205
The NI 9205 provides connections for 32 single-ended channels
or 16 differential channels.
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Figure 1. NI 9205 Pinout
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
33
34
35
36
37
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
NI 9205 Getting Started Guide | © National Instruments | 13

NI 9205 Signal Descriptions
Table 1. NI 9205 Signal Descriptions
Signal Name Description
AI Analog input channel
AISENSE Reference for each AI channel for NRSE measurements
COM Internally connected to the isolated ground reference
DO Digital output channel3
PFI Programmable function interface signal that functions as
a digital input
Signals
You can connect single-ended or differential signals to the
NI 9205. Use a differential measurement configuration to attain
more accurate measurements and less noise. The following table
3The digital output channel is supported only in CompactRIO systems.
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shows the signal pairs that are valid for differential connection
configurations with the NI 9205.
Table 2. Differential 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
NI 9205 Getting Started Guide | © National Instruments | 15

Table 2. Differential Pairs (Continued)
Channel AI + AI-
18 AI18 AI26
19 AI19 AI27
20 AI20 AI28
21 AI21 AI29
22 AI22 AI30
23 AI23 AI31
16 | ni.com | NI 9205 Getting Started Guide

Connecting Grounded Differential Signals
You can connect grounded differential signals to the NI 9205.
Figure 2. Connecting Grounded Differential Signals to the NI 9205
NI 9205
MUX ADC
PGIA
Vcm
AI0 (CH0+)
AI8 (CH0–)
AI1 (CH1+)
AI9 (CH1–)
COM
V1
V2
–
–
+
+
In a differential configuration, the NI 9205 rejects the common-
mode noise voltage, Vcm, during the measurement of V1. To
connect grounded differential signals to the NI 9205, you must
also connect the signal reference to COM.
NI 9205 Getting Started Guide | © National Instruments | 17

Connecting Floating Differential Signals
You can connect floating differential signals to the NI 9205.
Figure 3. Connecting Floating Differential 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 differential 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.
18 | ni.com | NI 9205 Getting Started Guide

Connecting RSE Voltage Signals
You can connect referenced single-ended (RSE) signals to the
NI 9205.
Figure 4. Connecting RSE Voltage Signals
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.
Note If you leave COM unconnected, the signals float
outside the working input range of the NI 9205. This
NI 9205 Getting Started Guide | © National Instruments | 19

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.
Figure 5. Connecting an RSE Voltage Signal 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
20 | ni.com | NI 9205 Getting Started Guide