PCI/PXI/
USB-6221 68
Pin
Specifications
2022-10-13
PCI/PXI/USB-6221 68 Pin Specifications
Contents
NI 6221 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
ni.com
PCI/PXI/USB-6221 68 Pin Specifications
NI 6221 Specifications
Analog Input
Number of channels
8 differential or 16 single ended
ADC resolution
16 bits
DNL
No missing codes guaranteed
INL
Refer to the AI Absolute Accuracy section
Sample rate
Single channel maximum
250 kS/s
Multichannel maximum (aggregate)
250 kS/s
Minimum
No minimum
Timing accuracy
50 ppm of sample rate
Timing resolution
50 ns
Input coupling
DC
Input range
±0.2 V, ±1 V, ±5 V, ±10 V
Maximum working voltage for analog inputs (signal +
common mode)
±11 V of AI GND
© National Instruments
3
PCI/PXI/USB-6221 68 Pin Specifications
CMRR (DC to 60 Hz)
92 dB
Input impedance
Device on
AI+ to AI GND
>10 GΩ in parallel with 100 pF
AI- to AI GND
>10 GΩ in parallel with 100 pF
Device off
AI+ to AI GND
820 Ω
AI- to AI GND
820 Ω
Input bias current
±100 pA
Crosstalk (at 100 kHz)
Adjacent channels
-75 dB
Non-adjacent channels
-90 dB
Small signal bandwidth (-3 dB)
700 kHz
Input FIFO size
4,095 samples
Scan list memory
4,095 entries
Data Transfers
PCI/PXI
4
ni.com
DMA (scatter-gather), interrupts, programmed I/O
PCI/PXI/USB-6221 68 Pin Specifications
USB
USB Signal Stream, programmed I/O
Overvoltage protection for all analog input and sense channels
Device on
±25 V for up to two AI pins
Device off
±15 V for up to two AI pins
Input current during overvoltage condition
±20 mA maximum/AI pin
Settling Time for Multichannel Measurements
Accuracy, full-scale step, all ranges
±90 ppm of step (±6 LSB)
4 μs convert interval
±30 ppm of step (±2 LSB)
5 μs convert interval
±15 ppm of step (±1 LSB)
7 μs convert interval
Typical Performance Graphs
Figure 1. Settling Error versus Time for Different Source Impedances
Error (ppm of Step Size)
10 k
1k
100
≤100 Ω
1 kΩ
2 kΩ
5 kΩ
10 kΩ
10
1
1
10
100
Time (ms)
© National Instruments
5
PCI/PXI/USB-6221 68 Pin Specifications
Figure 2. AI Small Signal Bandwidth
Normalized Signal Amplitude (dB)
2
0
–2
–4
–6
–8
–10
–12
–14
1k
10 k
100 k
1000 k
10000 k
10 k
100 k
Frequency (Hz)
Figure 3. AI CMRR
120
100
CMRR (dB)
80
60
40
10 V Range
5 V Range
1 V Range
0.2 V Range
20
0
10
100
1k
Frequency (Hz)
AI Absolute Accuracy
Note Accuracies listed are valid for up to one year from the device
external calibration.
6
Nominal
Range
Positive
Full Scale
Nominal
Range
Negative
Full Scale
Residual
Gain Error
(ppm of
Reading)
Residual
Offset
Error (ppm
of Range)
Offset
Tempco
(ppm of
Range/°C)
Random
Noise, σ
(μVrms)
Absolute
Accuracy
at Full
Scale (μV)
Sensitivity
(μV)
10
-10
75
20
57
244
3,100
97.6
5
-5
85
20
60
122
1,620
48.8
1
-1
95
25
79
30
360
12.0
ni.com
PCI/PXI/USB-6221 68 Pin Specifications
Nominal
Range
Positive
Full Scale
Nominal
Range
Negative
Full Scale
Residual
Gain Error
(ppm of
Reading)
Residual
Offset
Error (ppm
of Range)
Offset
Tempco
(ppm of
Range/°C)
Random
Noise, σ
(μVrms)
Absolute
Accuracy
at Full
Scale (μV)
Sensitivity
(μV)
0.2
-0.2
135
80
175
13
112
5.2
Table 3. AI Absolute Accuracy
Note Sensitivity is the smallest voltage change that can be detected. It is
a function of noise.
Gain tempco
25 ppm/°C
Reference tempco
5 ppm/°C
INL error
76 ppm of range
AI Absolute Accuracy Equation
AbsoluteAccuracy = Reading · (GainError) + Range · (OffsetError) +
NoiseUncertainty
GainError = ResidualAIGainError + GainTempco
· (TempChangeFromLastInternalCal) + ReferenceTempco ·
(TempChangeFromLastExternalCal)
OffsetError = ResidualAIOffsetError + OffsetTempco ·
(TempChangeFromLastInternalCal) + INLError
NoiseUncertainty =
■
■
■
Random Noise
100
3
for a coverage factor of 3 σ and averaging 100 points.
© National Instruments
7
PCI/PXI/USB-6221 68 Pin Specifications
AI Absolute Accuracy Example
Absolute accuracy at full scale on the analog input channels is determined using the
following assumptions:
■
■
■
■
TempChangeFromLastExternalCal = 10 °C
TempChangeFromLastInternalCal = 1 °C
number_of_readings = 100
CoverageFactor = 3 σ
For example, on the 10 V range, the absolute accuracy at full scale is as follows:
■
■
■
GainError = 75 ppm + 25 ppm · 1 + 5 ppm · 10 = 150 ppm
OffsetError = 20 ppm + 57 ppm · 1 + 76 ppm = 153 ppm
NoiseUncertainty =
244 µV 3
100
= 73 µV
AbsoluteAccuracy = 10 V · (GainError) + 10 V · (OffsetError) +
NoiseUncertainty = 3,100 µV
■
Analog Output
Number of channels
2
DAC resolution
16 bits
DNL
±1 LSB
Monotonicity
16 bit guaranteed
Maximum update rate
1 channel
8
ni.com
833 kS/s
PCI/PXI/USB-6221 68 Pin Specifications
2 channels
740 kS/s per channel
Timing accuracy
50 ppm of sample rate
Timing resolution
50 ns
Output range
±10 V
Output coupling
DC
Output impedance
0.2 Ω
Output current drive
±5 mA
Overdrive protection
±25 V
Overdrive current
10 mA
Power-on state
±20 mV [1]
Power-off glitch
400 mV for 200 ms
Output FIFO size
8,191 samples shared among channels used
Data transfers
PCI/PXI
DMA (scatter-gather), interrupts, programmed I/O
USB
USB Signal Stream, programmed I/O
AO waveform modes
Non-periodic waveform, periodic waveform
regeneration mode from onboard FIFO, periodic
© National Instruments
9
PCI/PXI/USB-6221 68 Pin Specifications
waveform regeneration from host buffer including
dynamic update
Settling time, full-scale step, 15 ppm (1 LSB) 6 µs
Slew rate
15 V/µs
Glitch energy
Magnitude
100 mV
Duration
2.6 µs
AO Absolute Accuracy
Absolute accuracy at full-scale numbers is valid immediately following internal
calibration and assumes the device is operating within 10 °C of the last external
calibration.
Note Accuracies listed are valid for up to one year from the device
external calibration.
Nominal
Range
Positive Full
Scale
Nominal
Range
Negative
Full Scale
Residual
Gain Error
(ppm of
Reading)
Gain
Tempco
(ppm/°C)
Residual
Offset Error
(ppm of
Range)
Offset
Absolute
Tempco (ppm Accuracy at
of Range/°C) Full Scale
(μV)
10
-10
90
10
40
5
Table 3. AO Absolute Accuracy
10
Reference tempco
5 ppm/°C
INL error
128 ppm of range
ni.com
3,230
PCI/PXI/USB-6221 68 Pin Specifications
AO Absolute Accuracy Equation
AbsoluteAccuracy = OutputValue · (GainError) + Range · (OffsetError)
GainError = ResidualGainError + GainTempco
· (TempChangeFromLastInternalCal) + ReferenceTempco ·
(TempChangeFromLastExternalCal)
OffsetError = ResidualOffsetError + AOOffsetTempco ·
(TempChangeFromLastInternalCal) + INLError
■
■
Digital I/O/PFI
Static Characteristics
Number of channels
24 total, 8 (P0.), 16 (PFI /P1, PFI /P2)
Ground reference
D GND
Direction control
Each terminal individually programmable as input or output
Pull-down resistor
50 kΩ typical, 20 kΩ minimum
Input voltage protection
±20 V on up to two pins[2]
Waveform Characteristics (Port 0 Only)
Terminals used
Port 0 (P0.)
Port/sample size
Up to 8 bits
Waveform generation (DO) FIFO
2,047 samples
© National Instruments
11
PCI/PXI/USB-6221 68 Pin Specifications
Waveform acquisition (DI) FIFO
2,047 samples
DI or DO Sample Clock frequency 0 MHz to 1 MHz, system and bus activity dependent
Data transfers
PCI/PXI
DMA (scatter-gather), interrupts, programmed I/O
USB
USB Signal Stream, programmed I/O
DI or DO Sample Clock source[3] Any PFI, RTSI, AI Sample or Convert Clock, AO Sample Clock,
Ctr n Internal Output, and many other signals
PFI/Port 1/Port 2 Functionality
Functionality
Static digital input, static digital output, timing input, timing output
Timing output sources Many AI, AO, counter, DI, DO timing signals
Debounce filter settings 125 ns, 6.425 µs, 2.56 ms, disable; high and low transitions; selectable
per input
Recommended Operating Conditions
12
Level
Minimum
Maximum
Input high voltage (VIH)
2.2 V
5.25 V
Input low voltage (VIL)
0V
0.8 V
Output high current (IOH) P0.
—
-24 mA
Output high current (IOH) PFI /P1/P2
—
-16 mA
Output low current (IOL) P0.
—
24 mA
Output low current (IOL) PFI /P1/P2
—
16 mA
ni.com
PCI/PXI/USB-6221 68 Pin Specifications
Electrical Characteristics
Level
Minimum
Maximum
Positive-going threshold (VT+)
—
2.2 V
Negative-going threshold (VT-)
0.8 V
—
Delta VT hystersis (VT+ - VT-)
0.2 V
—
IIL input low current (Vin = 0 V)
—
-10 µA
IIH input high current (Vin = 5 V)
—
250 µA
Digital I/O Characteristics
Figure 4. DIO Port 0: Ioh versus Voh
0
55 °C; Vdd = 4.5 V
25 °C; Vdd = 5.0 V
0 °C; Vdd = 5.5 V
–5
–10
Ioh (mA)
–15
–20
–25
–30
–35
–40
–45
–50
2
3
4
5
6
Voh (V)
Figure 5. DIO PFI/Port 1/Port 2: Ioh versus Voh
0
–5
–10
Ioh (mA)
–15
–20
–25
–30
–35
55 °C; Vdd = 4.5 V
25 °C; Vdd = 5.0 V
0 °C; Vdd = 5.5 V
–40
–45
–50
2
3
4
5
6
Voh (V)
© National Instruments
13
PCI/PXI/USB-6221 68 Pin Specifications
Figure 6. DIO Port 0: Iol versus Vol
40
35
30
Iol (mA)
25
20
15
55 °C; Vdd = 4.5 V
25 °C; Vdd = 5.0 V
0 °C; Vdd = 5.5 V
10
5
0
0
0.2
0.4
0.6
0.8
1.0
1.2
0.8
1.0
1.2
Vol (V)
Figure 7. DIO PFI/Port 1/Port 2: Iol versus Vol
40
55 °C; Vdd = 4.5 V
25 °C; Vdd = 5.0 V
0 °C; Vdd = 5.5 V
35
30
Iol (mA)
25
20
15
10
5
0
0
0.2
0.4
0.6
Vol (V)
General-Purpose Counters/Timers
14
Number of counter/timers
2
Resolution
32 bits
Counter measurements
Edge counting, pulse, semi-period, period, two-edge separation
Position measurements
X1, X2, X4 quadrature encoding with Channel Z reloading; twopulse encoding
ni.com
PCI/PXI/USB-6221 68 Pin Specifications
Output applications
Pulse, pulse train with dynamic updates, frequency division,
equivalent time sampling
Internal base clocks
80 MHz, 20 MHz, 0.1 MHz
External base clock frequency 0 MHz to 20 MHz
Base clock accuracy
50 ppm
Inputs
Gate, Source, HW_Arm, Aux, A, B, Z, Up_Down
Routing options for inputs
Any PFI, RTSI, PXI_TRIG, PXI_STAR, analog trigger, many internal
signals
FIFO
2 samples
Data transfers
PCI/PXI Dedicated scatter-gather DMA controller for each counter/timer; interrupts,
programmed I/O
USB
USB Signal Stream, programmed I/O
Frequency Generator
Number of channels
1
Base clocks
10 MHz, 100 kHz
Divisors
1 to 16
Base clock accuracy
50 ppm
© National Instruments
15
PCI/PXI/USB-6221 68 Pin Specifications
Output can be available on any output PFI or RTSI terminal.
Phase-Locked Loop (PLL)
Note PCI/PXI devices only.
Number of PLLs 1
Reference signal PXI_STAR, PXI_CLK10, RTSI
Output of PLL
80 MHz Timebase; other signals derived from 80 MHz Timebase including
20 MHz and 100 kHz Timebases
External Digital Triggers
16
Source
Any PFI, RTSI, PXI_TRIG, PXI_STAR
Polarity
Software-selectable for most signals
Analog input function
Start Trigger, Reference Trigger, Pause Trigger, Sample Clock,
Convert Clock, Sample Clock Timebase
Analog output function
Start Trigger, Pause Trigger, Sample Clock,
Sample Clock Timebase
Counter/timer function
Gate, Source, HW_Arm, Aux, A, B, Z, Up_Down
Digital waveform generation (DO)
function
Sample Clock
Digital waveform acquisition (DI)
function
Sample Clock
ni.com
PCI/PXI/USB-6221 68 Pin Specifications
Device-to-Device Trigger Bus
PCI
RTSI [4]
PXI
PXI_TRIG , PXI_STAR
USB source
None
Output selections
10 MHz Clock, frequency generator output, many internal signals
Debounce filter settings 125 ns, 6.425 μs, 2.56 ms, disable; high and low transitions; selectable
per input
Bus Interface
PCI/PXI
3.3 V or 5 V signal environment
USB
USB 2.0 Hi-Speed or full-speed[5], [6]
DMA channels (PCI/PXI) 6, can be used for analog input, analog output, digital input, digital
output, counter/timer 0, counter/timer 1
USB Signal Stream
4, can be used for analog input, analog output, counter/timer 0, counter/
timer 1
The PXI device supports one of the following features:
■
■
May be installed in PXI Express hybrid slots
Or, may be used to control SCXI in PXI/SCXI combo chassis
M Series Part Number SCXI Control in PXI/SCXI Combo
Chassis
PXI Express Hybrid Slot Compatible
191332B-03
No
Yes
191332B-13
Yes
No
© National Instruments
17
PCI/PXI/USB-6221 68 Pin Specifications
M Series Part Number SCXI Control in PXI/SCXI Combo
Chassis
PXI Express Hybrid Slot Compatible
191322A-0x
No
Yes
Table 3. PXI/SCXI Combo and PXI Express Chassis Compatibility
Power Requirements
Current draw from bus during no-load condition[7]
+5 V
0.02 A
+3.3 V
0.25 A
+12 V
0.15 A
Current draw from bus during AI and AO overvoltage condition[7]
+5 V
0.02 A
+3.3 V
0.25 A
+12 V
0.25 A
Caution USB devices must be powered with an NI offered AC adapter
or a National Electric Code (NEC) Class 2 DC source that meets the power
requirements for the device and has appropriate safety certification marks
for country of use.
USB power supply
requirements
18
ni.com
11 to 30 VDC, 20 W, locking or non-locking power jack with 0.080 in.
diameter center pin, 5/16-32 thread for locking collars
PCI/PXI/USB-6221 68 Pin Specifications
Current Limits
Caution Exceeding the current limits may cause unpredictable behavior
by the device and/or PC/chassis.
PCI, +5 V terminal
1 A maximum[8]
PXI
+5 V terminal
1 A maximum
P0/PFI/P1/P2 and +5 V terminals combined
2 A maximum[8]
USB
+5 V terminal
1 A maximum[8]
P0/PFI/P1/P2 and +5 V terminals combined
2 A maximum
Power supply fuse
2 A, 250 V
Physical Characteristics
Dimensions
PCI printed circuit board
10.6 cm × 15.5 cm(4.2 in. × 6.1 in.)
PXI printed circuit board
Standard 3U PXI
Screw Terminal (includes connectors) 26.67 cm × 17.09 cm × 4.45 cm(10.5 in. × 6.73 in. × 1.75 in.)
BNC (includes connectors)
28.6 cm × 17 cm × 6.9 cm(11.25 in. × 6.7 in. × 2.7 in.)
© National Instruments
19
PCI/PXI/USB-6221 68 Pin Specifications
USB OEM
Refer to the NI USB-622x/625x/628x OEM User Guide
Weight
PCI
92 g (3.2 oz)
PXI
162 g (5.7 oz)
USB Screw Terminal
1.2 kg (2 lb10 oz)
USB OEM
131 g (4.6 oz)
I/O connector
PCI/PXI
1 68-pin VHDCI
Calibration
Recommended warm-up time
PCI/PXI
15 minutes
USB
30 minutes
Calibration interval
1 year
Maximum Working Voltage
Connect only voltages that are below these limits.
Channel-to-earth
20
ni.com
11 V, Measurement Category I
PCI/PXI/USB-6221 68 Pin Specifications
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 use for measurements within Categories II, III, or IV.
Note Measurement Categories CAT I and CAT O (Other) are equivalent.
These test and measurement circuits are not intended for direct
connection to the MAINS building installations of Measurement Categories
CAT II, CAT III, or CAT IV.
Environmental
Operating temperature
PCI/PXI
0 ºC to 55 ºC
USB
0 ºC to 45 ºC
Storage temperature
-20 ºC to 70 ºC
Humidity
10% RH to 90% RH, noncondensing
Maximum altitude
2,000 m
Pollution Degree (indoor use only)
2
Indoor use only.
© National Instruments
21
PCI/PXI/USB-6221 68 Pin Specifications
Shock and Vibration (PXI Only)
Operational shock
30 g peak, half-sine, 11 ms pulse (Tested in accordance
with IEC 60068-2-27. Test profile developed in accordance with
MIL-PRF-28800F.)
Random vibration
Operating
5 Hz to 500 Hz, 0.3 grms
Nonoperating 5 Hz to 500 Hz, 2.4 grms (Tested in accordance with IEC 60068-2-64. Nonoperating
test profile exceeds the requirements of MIL-PRF-28800F, Class 3.)
Safety Compliance Standards
This product is designed to meet the requirements of the following electrical
equipment safety standards for measurement, control, and laboratory use:
■
■
IEC 61010-1, EN 61010-1
UL 61010-1, CSA C22.2 No. 61010-1
Note For safety certifications, refer to the product label or the Product
Certifications and Declarations section.
Electromagnetic Compatibility
CE Compliance
■
22
ni.com
2011/65/EU; Restriction of Hazardous Substances (RoHS)
PCI/PXI/USB-6221 68 Pin Specifications
Product Certifications and Declarations
Refer to the product Declaration of Conformity (DoC) for additional regulatory
compliance information. To obtain product certifications and the DoC for NI
products, visit ni.com/product-certifications, search by model number, and click
the appropriate link.
Environmental Management
NI 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 Engineering a Healthy
Planet 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.
EU and UK Customers
•
Waste Electrical and Electronic Equipment (WEEE)—At the end of the
product life cycle, all NI products must be disposed of according to local laws and
regulations. For more information about how to recycle NI products in your region,
visit ni.com/environment/weee.
电子信息产品污染控制管理办法（中国 RoHS）
•
中国 RoHS— NI 符合中国电子信息产品中限制使用某些有害物
质指令(RoHS)。关于 NI 中国 RoHS 合规性信息，请登录 ni.com/environment/
rohs_china。(For information about China RoHS compliance, go to ni.com/
environment/rohs_china.)
e
5
40
© National Instruments
23
PCI/PXI/USB-6221 68 Pin Specifications
Device Pinouts
AI 0 (AI 0+)
AI GND
AI 9 (AI 1–)
AI 2 (AI 2+)
AI GND
AI 11 (AI 3–)
AI SENSE
AI 12 (AI 4–)
AI 5 (AI 5+)
AI GND
AI 14 (AI 6–)
AI 7 (AI 7+)
AI GND
AO GND
AO GND
D GND
P0.0
P0.5
D GND
P0.2
P0.7
P0.3
PFI 11/P2.3
PFI 10/P2.2
D GND
PFI 2/P1.2
PFI 3/P1.3
PFI 4/P1.4
PFI 13/P2.5
PFI 15/P2.7
PFI 7/P1.7
PFI 8/P2.0
D GND
D GND
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
AI 8 (AI 0–)
AI 1 (AI 1+)
AI GND
AI 10 (AI 2–)
AI 3 (AI 3+)
AI GND
AI 4 (AI 4+)
AI GND
AI 13 (AI 5–)
AI 6 (AI 6+)
AI GND
AI 15 (AI 7–)
AO 0
AO 1
NC
P0.4
D GND
P0.1
P0.6
D GND
+5 V
D GND
D GND
PFI 0/P1.0
PFI 1/P1.1
D GND
+5 V
D GND
PFI 5/P1.5
PFI 6/P1.6
D GND
PFI 9/P2.1
PFI 12/P2.4
PFI 14/P2.6
NC = No Connect
24
ni.com
CONNECTOR 0
(AI 0-15)
Figure 8. NI PCI/PXI-6221 Pinout
TERMINAL 68
TERMINAL 34
TERMINAL 35
TERMINAL 1
PCI/PXI/USB-6221 68 Pin Specifications
Figure 9. NI USB-6221 Screw Terminal Pinout
AI 0
AI 8
AI GND
AI 1
AI 9
AI GND
AI 2
AI 10
AI GND
AI 3
AI 11
AI GND
AI SENSE
AI GND
AO 0
AO GND
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
AI 4
AI 12
AI GND
AI 5
AI 13
AI GND
AI 6
AI 14
AI GND
AI 7
AI 15
AI GND
NC
AI GND
AO 1
AO GND
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
PFI 0/P1.0
PFI 1/P1.1
PFI 2/P1.2
PFI 3/P1.3
PFI 4/P1.4
PFI 5/P1.5
PFI 6/P1.6
PFI 7/P1.7
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
PFI 8/P2.0
D GND
PFI 9/P2.1
D GND
PFI 10/P2.2
D GND
PFI 11/P2.3
D GND
PFI 12/P2.4
D GND
PFI 13/P2.5
D GND
PFI 14/P2.6
D GND
PFI 15/P2.7
+5 V
NC = No Connect
© National Instruments
25
PCI/PXI/USB-6221 68 Pin Specifications
Figure 10. NI USB-6221 BNC Top Panel and Pinout
1 When the USB Screw Terminal device is powered on, the analog output signal is
not defined until after USB configuration is complete.
2 Stresses beyond those listed under Input voltage protection may cause
permanent damage to the device.
3 The digital subsystem does not have its own dedicated internal timing engine.
Therefore, a sample clock must be provided from another subsystem on the device
or an external source.
26
ni.com
PCI/PXI/USB-6221 68 Pin Specifications
4 In other sections of this document, RTSI refers to RTSI for the PCI devices or
PXI_TRIG for PXI devices.
5 If you are using an USB M Series device in full-speed mode, device performance
will be lower and you will not be able to achieve maximum sample/update rates.
6 Operating on a full-speed bus may result in lower performance.
7 Does not include P0/PFI/P1/P2 and +5 V terminals.
8 Older revisions have a self-resetting fuse that opens when current exceeds this
specification. Newer revisions have a traditional fuse that opens when current
exceeds this specification. This fuse is not customer-replaceable; if the fuse
permanently opens, return the device to NI for repair.
© 2022 National Instruments Corporation.
© National Instruments
27
工商网监
湘ICP备2023018690号
