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OPERATING INSTRUCTIONS AND SPECIFICATIONS
NI 9208E
16-Channel, ±20 mA, 24-Bit Analog Input Module
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This document describes how to use the National Instruments 9208E
and includes dimensions, pin assignments, and specifications for the
NI 9208E. Visit ni.com/info and enter rdsoftwareversion to
determine which software you need for the modules you are using.
For information about installing, configuring, and programming the
system, refer to the system documentation. Visit
enter
cseriesdoc for information about C Series documentation.
Caution National Instruments makes no electromagnetic
compatibility (EMC) or CE marking compliance claims
for the NI 9208E. The end-product supplier is responsible
for conformity to any and all compliance requirements.
Caution The NI 9208E must be installed inside a suitable
enclosure prior to use. Hazardous voltages may be present.
ni.com/info and
NI 9208E Operating Instructions and Specifications 2 ni.com
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NI 9208E Dimensions
73.4 (2.89)
0.0 (0.00)
58.4 (2.30)
0.0 (0.00)
The following figure shows the dimensions of the NI 9208E.
© National Instruments Corp. 3 NI 9208E Operating Instructions and Specifications
Figure 1. NI 9208E Dimensions in Millimeters (Inches)
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Connecting the NI 9208E
Vsup
Vsup
Vsup
Vsup
Vsup
Vsup
Vsup
Vsup
COM
COM
Vsup
Vsup
Vsup
Vsup
Vsup
Vsup
Vsup
Vsup
AI0
AI1
AI2
AI3
AI4
AI5
AI6
AI7
COM
COM
AI8
AI9
AI10
AI11
AI12
AI13
AI14
AI15
Vsup
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
The NI 9208E has a 37-pin DSUB connector that provides
connections for 16 analog input channels.
NI 9208E Operating Instructions and Specifications 4 ni.com
Figure 2. NI 9208E Pin Assignments
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Each channel has an AI pin to which you can connect a current
signal. The NI 9208E also has 17 V
pins, one for connecting an
sup
external power supply, and one for each channel. There are also
four common pins, COM, that are internally connected to the
isolated ground reference of the module.
The input signals are scanned, amplified, conditioned, and then
sampled by a single 24-bit ADC. The module provides overvoltage
protection for each channel. Only one channel can be in an
overvoltage condition at a time. Refer to the Specifications section
for information about overvoltage protection. Refer to Figure 3 for
an illustration of the input circuitry on the NI 9208E.
© National Instruments Corp. 5 NI 9208E Operating Instructions and Specifications
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NI 9208E
R
R
Amp
Isolated
ADC
MUX
V
sup
V
sup
AI0
COM
COM
AI15
Figure 3. Input Circuitry on the NI 9208E
NI 9208E Operating Instructions and Specifications 6 ni.com
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You can connect an external power supply to the NI 9208E. This
power supply provides the current for the devices you connect to
the module. Connect the positive lead of the power supply to a
V
pin and the negative lead of the power supply to COM. Install
sup
a 2 A maximum, fast-acting fuse between the external power
supply and the V
information about the V
Note The V
pin. Refer to the Specifications section for
sup
pins.
sup
pins are internally connected to each
sup
other. You can connect only one external voltage supply
to the device.
Caution Do not remove or insert modules if the external
power supply connected to the V
and COM pins is
sup
powered on.
© National Instruments Corp. 7 NI 9208E Operating Instructions and Specifications
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You can connect single-ended current signals to the NI 9208E,
NI 9208E
+
–
COM
AI0
External
Power
Supply
Loop-Powered
Current
Transducer
V
sup
COM
V
sup
2 A
Max
including loop-powered and three-wire current transducers. To
connect a loop-powered transducer, connect the current signal to
the AI pin of the channel and the supply terminal to a V
pin. For
sup
a three-wire transducer, also connect the common of the device to
COM. Refer to Figures 4 and 5 for illustrations of how to connect
loop-powered and three-wire current transducers to the NI 9208E.
Figure 4. Connecting a Loop-Powered Current Transducer to the NI 9208E
NI 9208E Operating Instructions and Specifications 8 ni.com
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Figure 5. Connecting a Three-Wire Current Transducer to the NI 9208E
NI 9208E
V
sup
COM
+
–
COM
V
sup
AI0
External
Power
Supply
Three-Wire
Current
Transducer
2 A
Max
OUT
+
–
© National Instruments Corp. 9 NI 9208E Operating Instructions and Specifications
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Sleep Mode
This module supports a low-power sleep mode. Support for sleep
mode at the system level depends on the chassis that the module is
plugged into. Refer to the chassis manual for information about
support for sleep mode. If the chassis supports sleep mode, refer to
the software help for information about enabling sleep mode. Visit
ni.com/info and enter cseriesdoc for information about
C Series documentation.
Typically, when a system is in sleep mode, you cannot
communicate with the modules. In sleep mode, the system
consumes minimal power and may dissipate less heat than it does
in normal mode. Refer to the Specifications section for more
information about power consumption and thermal dissipation.
NI 9208E Operating Instructions and Specifications 10 ni.com
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Specifications
The following specifications are typical for the range –40 to 85 °C
internal to any enclosures unless otherwise noted. All voltages are
relative to COM unless otherwise noted.
Input Characteristics
Number of channels .......................... 16 analog input channels
ADC resolution................................. 24 bits
Type of ADC..................................... Delta-Sigma
Sampling mode ................................. Scanned
Input range
Minimum.................................... ±21.5 mA
Typical ........................................ ±22 mA
Conversion time (per channel)
High-resolution mode................. 52 ms
High-speed mode........................ 2 ms
Overvoltage protection,
channel-to-COM ............................... ±30 V max on one channel at
a time
© National Instruments Corp. 11 NI 9208E Operating Instructions and Specifications
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V
sup
pins
Current........................................ 2 A max
Voltage........................................ 30 V max
Input impedance................................ 85 Ω
Accuracy
Measurement Conditions
Calibrated error, max
(–40 to 85 °C)
*
Range equals 22 mA.
Input noise
High-resolution mode................. 50 nA
High-speed mode........................ 200 nA
Stability
Gain drift .................................... 20 ppm/°C
Offset drift .................................. 62 nA/°C
Percent of Reading
(Gain Error)
0.76% 0.04%
rms
rms
Percent of Range
(Offset Error)
*
NI 9208E Operating Instructions and Specifications 12 ni.com
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NMRR (High-resolution mode only)
50 Hz .......................................... 66 dB
60 Hz .......................................... 68 dB
MTBF ............................................... Contact NI for Bellcore
MTBF or MIL-HDBK-217F
specifications.
Power Requirements
Power consumption from chassis
Active mode ............................... 282 mW max
Sleep mode ................................. 25 μW max
Thermal dissipation (at 85 °C)
Active mode ............................... 1.29 W max
Sleep mode ................................. 0.72 W max
© National Instruments Corp. 13 NI 9208E Operating Instructions and Specifications
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Physical Characteristics
Use a dry, low-velocity stream of air to clean the module. If
needed, use a soft-bristle brush for cleaning around components.
Note For two-dimensional drawings and
three-dimensional models of the C Series module and
connectors, visit ni.com/dimensions and search by
module number.
Weight............................................... 45 g (1.6 oz)
Safety
Safety Voltages
Connect only voltages that are within the following limits.
Channel-to-COM .............................. ±30 V
Isolation
Channel-to-channel .................... None
Channel-to-earth ground
Continuous ........................... 60 VDC,
Measurement Category I,
(Double insulation)
NI 9208E Operating Instructions and Specifications 14 ni.com
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Withstand ............................. 1,000 V
, verified by a 5 s
rms
dielectric withstand test
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 9208E to signals or use
for measurements within Measurement Categories II,
III, or IV.
Safety Standards
This product meets the requirements of the following standards
of safety for electrical equipment for measurement, control,
and laboratory use when installed in a suitable enclosure:
• IEC 61010-1, EN 61010-1
• UL 61010-1, CSA 61010-1
© National Instruments Corp. 15 NI 9208E Operating Instructions and Specifications
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Note For UL and other safety certifications, refer to the
product label or the Online Product Certification section.
Online Product Certification
Refer to the product Declaration of Conformity (DoC) for
additional regulatory compliance information. To obtain product
certifications and the DoC for this product, visit ni.com/
certification
, search by module number or product line,
and click the appropriate link in the Certification column.
Environmental
National Instruments C Series modules are intended for indoor use
only but may be used outdoors if installed in a suitable enclosure.
Refer to the manual for the chassis you are using for more
information about meeting these specifications.
Operating temperature
(IEC 60068-2-1, IEC 60068-2-2) .....–40 to 85 °C
Storage temperature
(IEC 60068-2-1, IEC 60068-2-2) .....–40 to 85 °C
Operating humidity
(IEC 60068-2-56).............................. 10 to 90% RH,
NI 9208E Operating Instructions and Specifications 16 ni.com
noncondensing
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Storage humidity
(IEC 60068-2-56).............................. 5 to 95% RH,
noncondensing
Maximum altitude............................. 2,000 m
Pollution Degree ............................... 2
Environmental Management
National Instruments is committed to designing and manufacturing
products in an environmentally responsible manner. NI recognizes
that eliminating certain hazardous substances from our products is
beneficial to the environment and to NI customers.
For additional environmental information, refer to the NI and the
Environment Web page at ni.com/environment. This page
contains the environmental regulations and directives with which
NI complies, as well as other environmental information not
included in this document.
© National Instruments Corp. 17 NI 9208E Operating Instructions and Specifications
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Waste Electrical and Electronic Equipment (WEEE)
RoHS
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National Instruments
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ѻકЁ䰤ࠊՓ⫼ᶤѯ᳝ᆇ⠽䋼ᣛҸ
(RoHS)
DŽ݇Ѣ
National Instruments
Ё
RoHS
ড়㾘ᗻֵᙃˈ䇋ⱏᔩ
ni.com/environment/rohs_china
DŽ
(For information
about China RoHS compliance, go to
ni.com/
environment/rohs_china
.)
EU Customers At the end of the life cycle, all products
must be sent to a WEEE recycling center. For more
information about WEEE recycling centers and National
Instruments WEEE initiatives, visit
environment/weee
.
ni.com/
Calibration
You can obtain the calibration certificate and information about
calibration services for the NI 9208E at
ni.com/calibration.
Calibration interval ........................... 2 years
NI 9208E Operating Instructions and Specifications 18 ni.com
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Where to Go for Support
The National Instruments Web site is your complete resource for
technical support. At
ni.com/support you have access to
everything from troubleshooting and application development
self-help resources to email and phone assistance from
NI Application Engineers.
National Instruments corporate headquarters is located at
11500 North Mopac Expressway, Austin, Texas, 78759-3504.
National Instruments also has offices located around the world to
help address your support needs. For telephone support in the
United States, create your service request at
ni.com/support
and follow the calling instructions or dial 512 795 8248. For
telephone support outside the United States, contact your local
branch office:
Australia 1800 300 800, Austria 43 662 457990-0,
Belgium 32 (0) 2 757 0020, Brazil 55 11 3262 3599,
Canada 800 433 3488, China 86 21 5050 9800,
Czech Republic 420 224 235 774, Denmark 45 45 76 26 00,
Finland 358 (0) 9 725 72511, France 01 57 66 24 24,
Germany 49 89 7413130, India 91 80 41190000,
Israel 972 3 6393737, Italy 39 02 41309277, Japan 0120-527196,
© National Instruments Corp. 19 NI 9208E Operating Instructions and Specifications
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Korea 82 02 3451 3400, Lebanon 961 (0) 1 33 28 28,
Malaysia 1800 887710, Mexico 01 800 010 0793,
Netherlands 31 (0) 348 433 466, New Zealand 0800 553 322,
Norway 47 (0) 66 90 76 60, Poland 48 22 328 90 10,
Portugal 351 210 311 210, Russia 7 495 783 6851,
Singapore 1800 226 5886, Slovenia 386 3 425 42 00,
South Africa 27 0 11 805 8197, Spain 34 91 640 0085,
Sweden 46 (0) 8 587 895 00, Switzerland 41 56 2005151,
Taiwan 886 02 2377 2222, Thailand 662 278 6777,
Turkey 90 212 279 3031, United Kingdom 44 (0) 1635 523545
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