National Instruments NI 9683 User manual

USER GUIDE AND SPECIFICATIONS
NI 9683
General Purpose Inverter Controller RIO Mezzanine Card
This document provides pinouts, connectivity information, and specifications for the National
Instruments 9683 General Purpose Inverter Control (GPIC) RIO Mezzanine Card (RMC).
Caution National Instruments makes no product safety, electromagnetic
compatibility (EMC), or CE marking compliance claims for the NI 9683. The
end-product supplier is responsible for conformity to any and all compliance
requirements.
Caution The NI 9683 must be installed inside a suitable enclosure prior to use.
Hazardous voltages may be present.
Caution Exercise caution when placing the NI 9683 inside an enclosure. Auxiliary
cooling may be necessary to keep the device under the maximum ambient
temperature rating for the NI 9683. Refer to the Specifications section for more
information about the maximum ambient temperature rating.
Caution The NI 9683 is designed for low voltage signals. You must ensure that all
signals connected to the NI 9683 are isolated and no unsafe voltages are present at
the NI 9683 inputs. Voltages that exceed the specifications could result in damage to
the NI 9683.
Caution Use the NI 9683 with only NI sbRIO-9605/9606 devices. The NI 9683 is
not electrically or mechanically compatible with other NI sbRIO devices.
Caution Do not operate the NI 9683 in a manner not specified in this user guide.
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 National Instruments for repair.

2|ni.com |NI 9683 User Guide and Specifications
Figure 1. NI 9683 Parts Locator Diagram
Dimensions
Figures 2 through 4 show dimensional drawings of the NI 9683.
Figure 2. NI 9683 Primary Side Dimensions in Millimeters (Inches)
1 Primary Side
2 Secondary Side
3 LVTTL DIO
4 Sourcing DI
5 Sinking DO and Relay Control DO
6 Half-bridge DO
7 Simultaneous AI
8 Scanned AI and AO
9 sbRIO Mezzanine Connector
12
7
5
9
3
4
6
8
114.3(4.500)
109.22 (4.300)
93.32 (3.674)
91.67 (3.609)
23.57 (0.928)
21.59 (0.850)
11.81 (0.465)
0.00 (0.000)
–5.08(–0.200)
–5.08(–0.200) –1.88 (–0.074)
0.00 (0.000)
32.26 (1.270) 49.05 (1.931) 71.76 (2.825)
108.59 (4.275) 145.39 (5.724) 162.05 (6.380) 169.67 (6.680) 174.75 (6.880)
111.1 (4.374)

NI 9683 User Guide and Specifications |© National Instruments |3
Figure 3. NI 9683 Secondary Side Dimensions in Millimeters (Inches)
Figure 4. NI 9683 Maximum Height of Components in Millimeters (Inches)
Note For more information about the dimensions of the NI 9683, including
two-dimensional drawings and three-dimensional models, go to ni.com/
dimensions.
105.46 (4.152)
84.12 (3.312)
73.66 (2.900)
12.70 (0.500)
165.91 (6.532)
53.34 (2.100)
10.92 (0.430)
147.32 (5.800)
3.76 (0.148)
0.00 (0.000)
–5.08(–0.200)
3.76 (0.148)
0 (0.000)
–5.08(–0.200)
11x Ø 3.30 (0.130)
9.98(0.393)

4|ni.com |NI 9683 User Guide and Specifications
Typical NI 9683 System
Figure 5 shows a typical NI 9683 system.
Figure 5. Typical NI 9683 System
1 Enclosure. The NI 9683 must be installed inside a suitable enclosure.
2 NI sbRIO-9605/9606. Use the NI 9683 with only NI sbRIO-9605/9606 sbRIO devices.
3 NI 9683.
4 Interface board. The NI 9683 specifications assume direct board-to-board connections. Refer the Selecting
a Wire Gauge for Relay Control Digital Outputs section for information about designing ribbon cables to
meet the relay control DO specifications on the NI 9683.
5 Local ambient temperature location. The local ambient temperature is the operating temperature of the
NI 9683 inside the enclosure. Refer to the Environmental section for more information about the operating
temperature.
6 Ambient temperature location. The ambient temperature is the operating temperature outside of the
enclosure. Refer to the Environmental section for more information about the operating temperature.
6
5
1
34
2

NI 9683 User Guide and Specifications |© National Instruments |5
Mating the NI 9683 to the NI sbRIO-9605/9606
Figure 6 shows how to mate the NI 9683 to the NI sbRIO-9605/9606. Ensure that the
NI sbRIO-9605/9606 is powered off before connecting the NI 9683.
Caution You must use the standoffs specified below when mating the NI 9683 to
the NI sbRIO-9605/9606 to properly seat the sbRIO mezzanine connectors and
prevent damaging the device.
Figure 6. Mating the NI 9683 to the NI sbRIO-9605/9606
Note The screws include a nylon patch to prevent them from loosening when
subject to vibration. NI recommends using a 3/16 in. socket and Phillips screwdriver
when mating the NI 9683 to the NI sbRIO-9605/9606 to ensure the screw installs in
the standoff correctly.
1 4-40 × 0.250 in. Screw (×8)
2 NI sbRIO-9605/9606
3 4-40 × 0.380 in. Standoff (×4)
4 NI 9683
2
1
1
3
4

6|ni.com |NI 9683 User Guide and Specifications
Connecting the NI 9683
The NI 9683 provides connections for 16 simultaneous analog input channels, 8 scanned analog
input channels, 8 analog output channels, 28 sourcing digital input channels, 14 half-bridge
digital output channels, 24 sinking digital output channels, 4 relay control digital output
channels, and 32 LVTTL digital input/output channels.
Table 7 lists and describes the connectors on the NI 9683 and the part number and manufacturer
of each connector. Refer to the manufacturer for information about using and matching these
connectors.
Figure 7. NI 9683 Connector Descriptions
Connector Description Recommended Mating Connector
Simultaneous AI 40-position header On-Shore Technology, Inc. (SH2-40G-PT)
Scanned AI, AO 20-position header On-Shore Technology, Inc. (SH2-20G-PT)
Sourcing DI 34-position header On-Shore Technology, Inc. (SH2-34G-PT)
Sinking DO, Relay Control DO 40-position header On-Shore Technology, Inc. (SH2-40G-PT)
Half-Bridge DO 26-position header On-Shore Technology, Inc. (SH2-26G-PT)
LVTTL DIO 60-position header On-Shore Technology, Inc. (SH2-60G-PT)

NI 9683 User Guide and Specifications |© National Instruments |7
Figure 8 shows the NI 9683 pin assignments.
Figure 8. NI 9683 Pin Assignments
GND
GND
GND
DIO 29
DIO 28
GND
DIO 25
DIO 24
GND
DIO 21
DIO 20
GND
DIO 17
DIO 16
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
+3.3V
+3.3V
DIO 31
DIO 30
GND
DIO 27
DIO 26
GND
DIO 23
DIO 22
GND
DIO 19
DIO 18
GND
DIO 15
DIO 14
DIO 13
DIO 12
DIO 11
DIO 10
DIO 9
DIO 8
DIO 7
DIO 6
DIO 5
DIO 4
DIO 3
DIO 2
DIO 1
DIO 0
60
58
56
54
52
50
48
46
44
42
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
59
57
55
53
51
49
47
45
43
41
39
37
35
33
31
29
27
25
23
21
19
17
15
13
11
9
7
5
3
1
NC
VI P1
DI P1.13
DI P1.11
DI P1.9
DI P1.7
DI P1.5
DI P1.3
DI P1.1
DI P0.13
DI P0.11
DI P0.9
DI P0.7
DI P0.5
DI P0.3
DI P0.1
VI P0
NC
GND
DI P1.12
DI P1.10
DI P1.8
DI P1.6
DI P1.4
DI P1.2
DI P1.0
DI P0.12
DI P0.10
DI P0.8
DI P0.6
DI P0.4
DI P0.2
DI P0.0
GND
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
2
4
6
9
10
12
14
16
18
20
22
24
26
28
30
32
34
DO0
DO1
DO2
DO3
DO4
DO5
DO6
GND
GND
GND
GND
GND
Vext
GND
GND
GND
GND
GND
GND
DO7
DO8
DO9
DO10
DO11
DO12
DO13
14
12
10
8
6
4
2
20
18
16
19
17
15
26
24
22
25
23
21
13
11
9
7
5
3
1
AI0 AI2 GND AI4 AI6 AO0 AO2 GND AO4 AO6
AI1 AI3 GND AI5 AI7 AO1 AO3 GND AO5 AO7
20
18
16
14
12
10
8
6
4
2
19
17
15
13
11
9
7
5
3
1
DO22 DO20 DO18 DO16 GND DO14 DO12 DO10 DO8 GND DO6 DO4 DO2 DO0 NC NC DO3+ DO2+ DO1+ DO0+
DO23 DO21 DO19 DO17 GND DO15 DO13 DO11 DO9 GND DO7 DO5 DO3 DO1 NC NC DO3– DO2– DO1– DO0–
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
3536
3738
3940
CSCOM CSCOM CSCOM CSCOM AI0+ AI1+ AI2+ AI3+ AI4+ AI5+ AI6+ AI7+ AI8+ AI9+ AI10+ AI11+ AI12+ AI13+ AI14+ AI15+
Simultaneous AI
Scanned AI & AO
LVTTL
Sinking DO
Relay
Control
DO
CSCOM CSCOM CSCOM CSCOM AI0– AI1– AI2– AI3– AI4– AI5– AI6– AI7– AI8– AI9– AI10– AI11– AI12– AI13– AI14– AI15–
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
39
37
35
33
31
29
27
25
23
21
19
17
15
13
11
9
7
65 43 21
Half-Bridge
DO
Sourcing DI

8|ni.com |NI 9683 User Guide and Specifications
Simultaneous Analog Input
The NI 9683 provides connections for 16 pseudo-differential analog input channels.
Each channel has an AI+ and AI- pin to which you can connect a voltage signal. AI- is internally
connected to the isolated ground reference through a high value resistor.
Connecting Differential and Single-Ended Voltage Signals to the
NI 9683
You can connect grounded or floating signal sources to the NI 9683. Connect the positive
voltage signal to AI+ and the negative voltage signal to the AI-.
Figure 9. Connecting a Differential Voltage Signal to a Simultaneous AI Channel
Figure 10. Connecting a Single-Ended Voltage Signal to a Simultaneous AI Channel
NI 9683 Circuitry
The NI 9683 analog channels share a common ground that is isolated from other parts of the
board. The NI 9683 protects each channel from overvoltages. Refer to the Specifications section
for more information about overvoltage protection. The incoming analog signal on each channel
is buffered and conditioned by the differential amplifier and then sampled by a 12-bit ADC.
Each channel has an independent track-and-hold amplifier and ADC that allow you to sample
and convert all 16 channel simultaneously.
Connecting Current Sensors to the NI 9683
You can connect current sensors to the NI 9683 using a termination resistor to convert the current
measurement to a single-ended voltage measurement.
Connect the current sensor output to AI+ and the external power supply COM to the current
sensor common pin (CS COM) on the NI 9683.
NI 9683
Simultaneous AI+
Simultaneous AI–
Isolated
ADC
Voltage Source
+
–
NI 9683
Simultaneous AI+
Simultaneous AI–
Isolated
ADC
Voltage Source
+
–

NI 9683 User Guide and Specifications |© National Instruments |9
Figure 11. Connecting a Current Sensor to the NI 9683
To avoid the affect of common mode impedance on the measurement, connect one end of all the
termination resistors to a single, small plane. Then have a single connection from the plane to
the CS COM pin of the NI 9683.
The NI 9683 simultaneous analog inputs have ±10 V and ±5 V input ranges that can
accommodate termination resistor values in a certain range, based on the sensor peak current.
Select the highest possible termination resistor to maximize the dynamic range of the analog
input. Refer to the Specifications section for more information about the analog input range. Use
the following equation to determine the maximum value for the terminal resistor based on the
sensor peak current.
For a current sensor with a peak output current of 70 mA, the maximum termination resistor that
can be used with the NI 9683 is as follows:
Note Using the ±5 V input range can reduce the power dissipation on the
termination resistor by 50% when compared to the power dissipation of the ±10 V
input range.
Scanned Analog Input (Monitoring)
The NI 9683 provides connections for 8 single-ended scanned analog input channels.
Each channel has an AI pin to which you can connect a voltage signal. Scanned analog input and
scanned analog output channels share four GND pins on the dedicated 20-position connector.
NI 9683
Interface Board
Termination
Resistor
AI0+OUT
PS–
PS+
PS–
PS+
AI1+
CSCOMCOM
Isolated
ADC
Current
Sensor
External
Power
Supply
Rmax
5V
I_peakmax
--------------------------=
Rmax
5V
0.07A
-------------- 71Ω==

10 |ni.com |NI 9683 User Guide and Specifications
Figure 12. Connecting Single-Ended Voltage Signals to the Scanned Analog Inputs
Scanned Analog Inputs Accuracy and Bandwidth
Use signal sources with an output impedance of less than 2 kΩto ensure specified performance.
Large source impedances add to the input resistor inside the NI 9683, which results in increased
settling time and decreases the accuracy of the measurement. Increased input impedance also
results in a decrease of the -3 dB bandwidth.
Half-Bridge Digital Output
The NI 9683 provides connections for 14 half-bridge digital output channels.
Each channel has an half-bridge DO pin to which you can connect a digital input device. An
external power supply referenced to ground of the board must be connected to Vext.
Figure 13. Connecting a Digital Device to a Half-Bridge DO Channel
The NI 9683 has push-pull half-bridge digital outputs, meaning the NI 9683 can sink or source
current. When the channel is ON, the half-bridge DO pin is driven to the external power supply
minus a voltage drop due to the sourced current. When the channel is turned OFF, the half-bridge
DO pin is driven to ground plus a voltage drop due to the sinked current.
Note Make sure the devices you connect to the NI 9683 are compatible with the
half-bridge digital output specifications. Use connections that match the output
impedance of the NI 9683 half-bridge outputs. Refer to the Specifications section for
information about output voltages.
NI 9683
ADCMUX
Scanned AI0
.
.
.
Scanned AI7
GND
Voltage Source
+
–
+
–
NI 9683
Half-Bridge DO
100 Ω
GND
Vext Device

NI 9683 User Guide and Specifications |© National Instruments |11
Sinking Digital Output
The NI 9683 provides connections for 24 sinking digital output channels.
Each channel has a sinking DO pin to which you can connect a digital input device. Sinking DO
pins have dedicated current return pins, GND, which are referenced to the ground of the board.
Figure 14. Connecting a Digital Device to a Sinking DO Channel
The NI 9683 has current sinking digital outputs, meaning that the output pin is driven to ground
(GND) when the channel is ON.
Make sure the devices you connect to the NI 9683 are compatible with the output specifications.
Refer to the Specifications section for information about output voltages.
Increasing Current Drive
Each channel has a continuous output current of 20 mA. If you want to increase the output
current to a device, you can connect any number of channels together in parallel. For example,
if you want to drive 80 mA of current, connect DO<0..3> in parallel as shown in Figure 15. You
must turn all parallel channels on and off simultaneously so that the current on any single
channel cannot exceed the 20 mA rating.
Figure 15. Increasing the Current to a Device Connected to the NI 9683
NI 9683
Sinking DO
Device
Vcc
NI 9683
Sinking DO3
Sinking DO1
Sinking DO0
Sinking DO2
80 mA
+
_
GND
20 mA
20 mA
20 mA
20 mA
External
Power
Supply
Device

12 |ni.com |NI 9683 User Guide and Specifications
Relay Control Digital Output
The NI 9683 provides connections for four relay control digital output channels. Each channel
has a relay control DO+ and a current return pin, relay control DO-.
The NI 9683 has current sinking outputs, meaning the relay control DO+ is driven to relay
control DO- when the channel is ON.
You can connect industrial devices such as solenoids, actuators, relays, and lamps to the NI 9683.
Refer to Figure 16 for an illustration of how to connect devices to the NI 9683.
Figure 16. Connecting an Industrial Device to a Relay Control DO Channel
Note Ensure that all the relay control DO+/- pins are held within the safety voltage
levels. A maximum common mode voltage of 30 VDC is allowed at a relay control
DO+/- pin with respect to the GND of the NI 9683. Refer to the Safety section for
maximum voltages allowed for the relay control DO channels.
Note NI recommends using the appropriate cabling for the current return pins
based on the amount of current returned per each relay control DO- output. Refer to
the Specifications section for information about peak and continuous current limits
based on the update rate.
Make sure the devices you connect to the NI 9683 are compatible with the output specifications.
Refer to the Specifications section for information about output voltages.
NI 9683
Relay Control DO+
Relay Control DO–
VDC1
VDC2
VDC3
VCM
+
–
Load
Relay Control DO+
Relay Control DO–
+
–
Load
Relay Control DO+
Relay Control DO–
+
–
Load
+
–

NI 9683 User Guide and Specifications |© National Instruments |13
Protecting the Relay Control Digital Outputs from Flyback Voltages
If the NI 9683 is switching an inductive or energy-storing device such as a solenoid, motor, or
relay and the device does not have flyback protection, install a flyback diode.
Figure 17. Connecting a Flyback Diode to a Relay Control DO Channel
Selecting a Wire Gauge for Relay Control Digital Outputs
The relay control digital output is capable of sinking 8 A of inrush current for a period of 300 ms
on a 60 second cycle and 500 mA of continuous current. Each channel is functionally isolated
from the other channels and the rest of the board, meaning that each relay control digital output
has a dedicated current return pin.
When using cables, make sure the current rating of the cable is able to handle the expected
current for your application. For example, a typical 28 AWG flat ribbon cable is rated at 225 mA
of continuous current per wire. In order to use the relay control digital outputs at their maximum
current capability, cables within category 24 AWG or lower should be used.
Sourcing Digital Input
The NI 9683 provides connections for 28 simultaneously sampled digital input channels
separated in ports P0 and P1. Ports P0 and P1 are independently powered using separate power
supply pins, VI P0 and VI P1. This allows you to connect the DI to multivoltage systems.
The NI 9683 has sourcing inputs, meaning the DI sources current from the VI P0 or VI P1 to the
sinking output device.The NI 9683 internally limits current signals connected to DI.
Each channel has a DI pin to which you can connect a digital input signal. The supply pins, VI P0
and VI P1, are referenced to the ground of the board. The DI operates in the low range or high
range based on the VI P0 or VI P1 voltage. Refer to the Specifications section for more
information about the low range and high range.
You can only connect 3-wire sinking-output devices to the NI 9683. Connect the sinking-output
device to the DI pin and the external power supply lead to the VI P0 or VI P1.
NI 9683
Relay Control DO+
Relay Control DO–
External
Power
Supply
+
–
Flyback
Diode
Inductive
Device

14 |ni.com |NI 9683 User Guide and Specifications
Figure 18. Connecting a Digital Device to a Sourcing DI Channel
The NI 9683 channel registers ON when the sinking-output is in the ON range. The channel
registers as OFF when the sinking-output is in the OFF range. If no device is connected to the
sourcing DI, the channel registers as OFF. Refer to the Specifications section for more
information about the ON and OFF ranges of the sourcing DI.
Note NI recommends that you leave sourcing DI channels that are not used in your
application unconnected to lower power dissipation through the onboard pull-up
resistor.
LVTTL Digital Input/Output
The NI 9683 provides connections for 32 LVTTL digital input/output channels.
The NI 9683 LVTTL DIO channels connect directly to the FPGA DIO on the
NI sbRIO-9605/9606 and are unbuffered and unprotected. Refer to the Specifications section for
more information about the maximum current.
Caution Operating the LVTTL DIO outside the rated specifications may result in
permanent damage to the FPGA on NI sbRIO-9605/9606.
Figure 19. Connecting to the LVTTL DIO Channels
If overshoot and undershoot aberrations and signal integrity are concerns for your application,
use a single load per line that does not exceed 25 pF. For edge sensitive signals, use channels
DIO0 through DIO15 for better signal integrity and crosstalk performance since these channels
have an individual GND pin.
The LVTTL DIO channels on the NI 9863 are routed with a 55 Ωcharacteristic trace impedance.
Route all external circuitry with a similar impedance to ensure the best signal quality.
You should perform signal integrity measurements to test the effect of signal routing and cable
type on your application. To meet defined power-up states for outputs, use a pull-up or pull-down
resistor on the line.
NI 9683
External
Power
Supply
+
–
Sinking-Output
Device
Sourcing DI
4.32 kΩ
VI P0/VI P1
GND
User
Board NI sbRIO-9605/6
FPGA
DIO0
DIO31
.
.
.
NI 9683
Z0= 55 Ω
Z0= 55 Ω
Z0= 55 Ω
Z0= 55 Ω

NI 9683 User Guide and Specifications |© National Instruments |15
System Diagrams
Figures 20 and 21 show diagrams for interfacing digital and analog signals with the NI 9683.
Figure 20. Interfacing Digital Signals with the NI 9683
NI sbRIO-9605/6
NI 9683
IGBT Intelligent
Power Module
9 V to 30 V
PS_COM
Top HB 1 IN
GND (for power)
Error Signal
+24 VCC
Supply
+15 VCC
Supply
Relay +
Relay –
+24 VDC IN
(13V to 30 V)
GND (for power)
GND
+24V
+24V_COM
LED
GND
Digital GND (GND)
Sourcing
DI0
+24V
+24V_COM
+24V_COM
+24V
+15V_DI
+15V_HBDO
+15V_HBDO
+15V_DI
Error
Monitor
Isolation
Relay Control DO+
Relay Control DO–
Sinking DO
GND
VI P0 (5 V to 24 V)
Sourcing DI P0.0
sbRIO Mezzanine Connector
VEXT (5 V to 24 V)
Half-Bride DO0
GND

16 |ni.com |NI 9683 User Guide and Specifications
Figure 21. Interfacing Analog Signals with the NI 9683
1 Do not connect the AI- pin when using termination resistors.
2 Use a small plane shape for the current return point to reduce the common-mode impedance.
3 Do not connect CS COM to GND.
NI sbRIO-9605/6
NI 9683
IGBT Intelligent
Power Module
9 V to 30 V
PS_COM
+24 VDC IN
(13V to 30 V)
Output
Sensor
Current
Sensor
4 mA to 20 mA
Sensor RTermination
Load
Digital GND (GND)
+15V_CS
+15V_CS
–15V_CS
CS_COM
GND (for power)
+24 VCC
Supply
+24V_COM
+24V
+15 VCC
Bipolar Supply
1
1
3
ADC0
CSCOM
Simultaneous AI0+
Simultaneous AI0–
Simultaneous AI1–
Simultaneous AI1+
ADC1
Simultaneous AI2–
Simultaneous AI2+
GND aux
AO (Voltage)
ADC2
AO0
GND
GND
Scanned AI2
sbRIO Mezzanine Connector
Isolation
Scanned AI1
Scanned AI0
ADC
DAC
.
.
.
+
–
2
RTermination

NI 9683 User Guide and Specifications |© National Instruments |17
Specifications
The following specifications are typical for the full operating temperature range unless otherwise
noted. Refer to the Environmental section for more information on operating temperatures.
Simultaneous Analog Input
Number of channels.......................................... 16
ADC resolution................................................. 12 bits
Input range
Typical ...................................................... ±5 V, ±10 V
Minimum .................................................. ±4.95 V, ±9.90 V
Common-mode range ....................................... ±10 V
Sample rate (per channel) ................................. 100 kS/s max
Accuracy
Stability
Gain drift................................................... 15 ppm/°C
Offset drift ................................................ 15 µV/°C
Noise................................................................. 1.5 mVrms
-3 dB bandwidth ............................................... 210 kHz
CMRR (fin = 60 Hz).......................................... 60 dB min
Input impedance
Differential................................................ 240 kΩ
Single-ended ............................................. 120 kΩ
Overvoltage protection ..................................... ±30 V max
Nominal
Range (V) Measurement Conditions*
Percent of
Reading
(Gain Error)
Percent of
Range
(Offset Error)†
±5 Maximum (-40 °C to 85 °C) 0.70% 0.28%
Typical (23 ° ±5 °C) 0.25% 0.12%
±10 Maximum (-40 °C to 85 °C) 0.70% 0.16%
Typical (23 ° ±5 °C) 0.25% 0.07%
AbsoluteAccuracy = Reading(GainError) + Range(OffsetError) + Noise
* Local ambient temperature. Refer to the Environmental section for more information about operating
temperatures.
†Offset error includes the effect of INL.

18 |ni.com |NI 9683 User Guide and Specifications
Scanned Analog Input (Monitoring)
Number of channels ..........................................8
ADC resolution .................................................12 bits
Input range
Typical.......................................................0 V to 5 V
Minimum ..................................................12 mV to 4.97 V
Sample rate (all channels).................................1 kS/s max
Accuracy1
Stability
Gain drift...................................................3 ppm/°C
Offset drift.................................................3 µV/°C
Noise .................................................................0.5 mVrms
-3 dB bandwidth................................................130 kHz
Input impedance for channel ON......................10 kΩ, 120 pF low pass filter
Input current for channel OFF ..........................10 μA max
Overvoltage protection .....................................±30 V max
Analog Output (Set-Point)
Number of channels ..........................................8
DAC resolution .................................................12 bits
Startup voltage ..................................................0 V
1 With signal source impedance <2 kΩ. Refer to the Scanned Analog Input (Monitoring) section for more
information about the influence of source impedance over accuracy.
Measurement
Conditions*
Percent of Reading
(Gain Error)
Percent of Range†
(Offset Error)‡
Maximum (-40 °C to 85 °C) 0.30% 0.23%
Typical (23 ° ±5 °C) 0.03% 0.03%
AbsoluteAccuracy = Reading(GainError) + Range(OffsetError) + Noise
*Local ambient temperature. Refer to the Environmental section for more information about operating
temperatures.
†Range equals 5 V.
‡Offset error includes the effect of INL.

NI 9683 User Guide and Specifications |© National Instruments |19
Output range
Typical ...................................................... 0 V to 5 V
Minimum .................................................. 14 mV to 4.97 V
Current drive (per channel)............................... 4 mA max
Update rate........................................................ 1 kS/s min
Accuracy
Stability
Gain drift................................................... 3 ppm/°C
Offset drift ................................................ 3 µV/°C
Noise
1 MHz bandwidth ..................................... 2.5 mVrms
100 kHz bandwidth................................... 0.3 mVrms
Protection
Overvoltage .............................................. +15 V/-5 V max
Short-circuit .............................................. Indefinitely
Sourcing Digital Input
Number of channels.......................................... 28
Input type .......................................................... Sourcing
Input range........................................................ 0 V to 24 V
External power supply voltage range (VI P0, VI P1)
Low-range mode....................................... 3 V to 6 V
High-range mode ...................................... 10 V to 24 V
Not supported ........................................... 6 V to 10 V
Digital logic levels
Low-range mode
OFF state........................................... ≥1.8 V min
ON state ............................................ ≤1 V max
Measurement Conditions*
Percent of Reading
(Gain Error)
Percent of Range†
(Offset Error)‡
Maximum (-40 °C to 85 °C) 0.33% 0.28%
Typical (23 ° ±5 °C) 0.06% 0.06%
AbsoluteAccuracy = OutputValue(GainError) + Range(OffsetError)
*Local ambient temperature. Refer to the Environmental section for more information about operating
temperatures.
†Range equals 5 V.
‡Offset error includes the effect of INL.

20 |ni.com |NI 9683 User Guide and Specifications
High-range mode
OFF state...........................................≥9.6 V min
ON state ............................................≤7.9 V max
Hold time1.........................................................0 s
Setup time2........................................................1 µs min
Update/transfer time .........................................3 µs max
Pull-up resistor ..................................................4.32 kΩ
Overvoltage protection .....................................±30 V max
Sinking Digital Output
Number of channels ..........................................24
Output type .......................................................Sinking
Startup voltage ..................................................Open
Output voltage (VO) .......................................... IO· RO
Continuous output current (IO)
on each channel.................................................20 mA
Output impedance (RO).....................................6 Ωmax
External power supply voltage range................0 V to 30 V
Maximum update time ......................................50 μs
Protection
Reversed-voltage ......................................None
Short-circuit ..............................................None
Half-Bridge Digital Output
Number of channels ..........................................14
Output type .......................................................Sourcing/Sinking
Startup voltage ..................................................0 V
Maximum continuous output current................10 mA
Output impedance .............................................100 Ω
External power supply voltage range (Vext)......5 V to 30 V
1 Hold time is the amount of time input signals must be stable after initiating a read from the NI 9683.
2 Setup time is the amount of time input signals must be stable before reading from the NI 9683.