USB-1608FS-Plus
User's Guide
Analog Input and Digital I/O
Document Revision 5A
November 2014
© Copyright 2014
HM USB-1608FS-Plus.docx
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Table of Contents
Preface
About this User's Guide ....................................................................................................................... 5
What you will learn from this user's guide ......................................................................................................... 5
Conventions in this user's guide ......................................................................................................................... 5
Where to find more information ......................................................................................................................... 5
Chapter 1
Introducing the USB-1608FS-Plus ....................................................................................................... 6
Functional block diagram ................................................................................................................................... 6
Chapter 2
Installing the USB-1608FS-Plus ........................................................................................................... 7
What comes with your shipment? ....................................................................................................................... 7
Hardware .......................................................................................................................................................................... 7
Software ............................................................................................................................................................................ 7
Documentation ................................ ................................................................ ................................................................ .. 7
Unpacking........................................................................................................................................................... 7
Installing the software ........................................................................................................................................ 7
Installing the hardware ....................................................................................................................................... 7
Calibrating the hardware..................................................................................................................................... 8
Chapter 3
Functional Details ................................................................................................................................. 9
Analog input modes ............................................................................................................................................ 9
Software paced .................................................................................................................................................................. 9
Hardware paced ................................................................................................................................................................ 9
BURSTIO ......................................................................................................................................................................... 9
External components ........................................................................................................................................ 10
USB connector .................................................................................................................................................................10
LED .................................................................................................................................................................................10
Screw terminals................................................................................................................................................................10
Signal connections ............................................................................................................................................ 11
Analog input ....................................................................................................................................................................11
Channel-Gain queue ........................................................................................................................................................11
Digital I/O ........................................................................................................................................................................12
Pull-up/down configuration .............................................................................................................................................12
Counter input ...................................................................................................................................................................13
SYNC I/O ........................................................................................................................................................................13
Trigger input ....................................................................................................................................................................13
Reserved ..........................................................................................................................................................................13
Ground ................................................................................................................................................................ .............13
Power output ....................................................................................................................................................................13
Accuracy ........................................................................................................................................................... 13
Synchronized operations ................................................................................................................................ ... 15
Mechanical drawings ................................................................................................................................ ........ 16
Chapter 4
Specifications ...................................................................................................................................... 17
Analog input ..................................................................................................................................................... 17
Accuracy ........................................................................................................................................................... 17
Analog input DC voltage measurement accuracy ............................................................................................................17
Noise performance ...........................................................................................................................................................18
Digital input/output........................................................................................................................................... 18
External trigger ................................................................................................................................ ................. 19
3
USB-1608FS-Plus User's Guide
External clock input/output............................................................................................................................... 19
Counter section ................................................................................................................................................. 20
Memory ............................................................................................................................................................ 20
Microcontroller ................................................................................................................................................. 20
Power ................................................................................................................................................................ 21
General ............................................................................................................................................................. 21
Environmental .................................................................................................................................................. 21
Mechanical ....................................................................................................................................................... 21
Screw terminal connector and pinout ............................................................................................................... 22
Declaration of Conformity .................................................................................................................. 23
4
Preface
About this User's Guide
What you will learn from this user's guide
This user's guide describes the Measurement Computing USB-1608FS-Plus data acquisition device and lists
device specifications.
Conventions in this user's guide
For more information
Text presented in a box signifies additional information and helpful hints related to the subject matter you are
reading.
Caution! Shaded caution statements present information to help you avoid injuring yourself and others,
damaging your hardware, or losing your data.
bold text Bold text is used for the names of objects on a screen, such as buttons, text boxes, and check boxes.
italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.
Where to find more information
Additional information about the USB-1608FS-Plus is available on our website at www.mccdaq.com. You can
also contact Measurement Computing Corporation by phone, fax, or email with specific questions.
Knowledgebase: kb.mccdaq.com
Tech support form: www.mccdaq.com/support/support_form.aspx
Email: techsupport@mccdaq.com
Phone: 508-946-5100 and follow the instructions for reaching Tech Support
For international customers, contact your local distributor. Refer to the International Distributors section on our
web site at www.mccdaq.com/International.
5
Chapter 1
Introducing the USB-1608FS-Plus
The USB-1608FS-Plus is an analog input and digital I/O data acquisition device providing the following
features:
Eight 16-bit single-ended (SE) analog input channels
Each input channel has a dedicated A/D converter for simultaneous sampling.
Software-selectable analog input ranges of ±10 V, ±5 V, ±2 V, and ±1 V
Eight individually configurable digital I/O channels
One 32-bit event counter
One external digital trigger input
Bidirectional external clock for synchronous operation with more than one device.
Screw terminals for field wiring connections
The device is powered by the +5V USB supply from the computer, requiring no external power.
The USB-1608FS-Plus is compatible with both USB 1.1 and USB 2.0 ports. The speed of the device may be
limited when using a USB 1.1 port due to the difference in transfer rates on the USB 1.1 versions of the
protocol (low-speed and full-speed).
Functional block diagram
USB-1608FS-Plus functions are illustrated in the block diagram shown here.
Figure 1. Functional block diagram
6
Installing the USB-1608FS-Plus
What comes with your shipment?
Verify that the following hardware components are included in the shipment:
Hardware
USB-1608FS-Plus
USB cable
Software
MCC DAQ CD
Documentation
MCC DAQ Quick Start
The MCC DAQ Quick Start booklet provides an overview of the MCC DAQ software you received with
the device, and includes information about installing the software. Please read this booklet completely
before installing any software or hardware.
DAQami Quick Start
The DAQami Quick Start insert provides information about the DAQami advanced data logging
application, including a quick start procedure and quick reference guide.
Chapter 2
Unpacking
As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the device from its packaging, ground yourself using a wrist strap or by simply
touching the computer chassis or other grounded object to eliminate any stored static charge.
Contact us immediately if any components are missing or damaged.
Installing the software
Refer to the MCC DAQ Quick Start for instructions on installing the software on the MCC DAQ CD. Refer to
the device product page on the Measurement Computing website for information about the included and
optional software supported by the USB-1608FS-Plus.
Install the software before you install your device
The driver needed to run the USB-1608FS-Plus is installed with the software. Therefore, you need to install the
software package you plan to use before you install the hardware.
For operation on a Windows operating system, we recommend that you run Windows Update to update your
operating system with the latest USB drivers.
Installing the hardware
To connect the USB-1608FS-Plus to your system, connect the USB cable to an available USB port on the
computer or to an external USB hub connected to the computer. Connect the other end of the USB cable to the
USB connector on the device. No external power is required.
When connected for the first time, a Found New Hardware dialog opens when the operating system detects the
device. When the dialog closes, the installation is complete. The LED on the USB-1608FS-Plus turns on after
the device is successfully installed.
7
USB-1608FS-Plus User's Guide Installing the USB-1608FS-Plus
If the LED turns off
If communication is lost between the device and the computer, the device LED turns off. To restore
communication, disconnect the USB cable from the computer and then reconnect it. This should restore
communication, and the LED should turn on.
Calibrating the hardware
The Measurement Computing Manufacturing Test department performs the initial factory calibration. Return
the device to Measurement Computing Corporation when calibration is required. The recommended calibration
interval is one year.
The USB-1608FS-Plus does not support field calibration.
8
Chapter 3
Functional Details
Analog input modes
The USB-1608FS-Plus can acquire analog input data in three modes – software paced, hardware paced, and
BURSTIO.
Software paced
You can acquire one analog sample at a time in software-paced mode. You initiate the A/D conversion by
calling a software command. The analog value is converted to digital data and returned to the computer. You
can repeat this procedure until you have the total number of samples that you want.
The USB-1608FS-Plus can attain throughput rates up to 500 S/s using a software loop. This rate is systemdependent.
Hardware paced
The USB-1608FS-Plus can acquire data from up to eight channels simultaneously in hardware-paced mode. The
analog data is acquired, converted to digital values, and written to an onboard FIFO buffer on the device until
you stop the scan. Data is transferred in blocks from the device to the memory buffer on your computer.
The A/D converter is paced by either an internal or external clock source.
The maximum sampling rate is an aggregate rate. The total sample rate using hardware-paced mode is 400 kS/s
divided by the number of channels, with a maximum rate of 100 kS/s for any channel. You can acquire data
from one to four channels at 100 kS/s each, six channels at 66.7 kS/s each, and so on, up to eight channels at
50 kS/s each. You can start a hardware-paced scan with a software command. Optionally, hardware-paced scans
can be delayed by an external hardware trigger event.
BURSTIO
When using BURSTIO, the USB-1608FS-Plus can acquire data at a higher rate using the full capacity of the
32 kilosample FIFO. The acquired data is read from the FIFO and transferred to a user buffer in the computer
after the acquisition is complete. You can initiate a single acquisition sequence of one to eight channels with a
software command. Optionally, BURSTIO scans can be delayed by an external hardware trigger event.
When BURSTIO is enabled, the number of samples acquired in a scan is limited to the depth of the onboard
memory. The maximum sample rate in BURSTIO mode is an aggregate rate of 800 kS/s. The maximum per
channel sample rate is 100 kS/s for any or all channels.
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USB-1608FS-Plus User's Guide Functional Details
1
Screw terminal pins 21 to 40
3
Screw terminal pins 1 to 20
2
LED 4 USB connector
LED state
Indication
On – steady green
The device is connected to a computer or external USB hub.
Blinks once
A USB command is received.
Blinks continuously
An analog input scan is in progress.
External components
The external components – screw terminal banks, LED, and USB connector –are shown in Figure 2.
Screw terminals
LED
USB connector
Figure 2. USB-1608FS-Plus components
USB connector
Receives the supplied USB cable. When connected to a computer or USB hub, the cable provides +5 V power
and communication. No external power supply is required.
LED
The LED indicates the communication status; it cannot be disabled.
LED behavior
Screw terminals
The screw terminals provide the following connections:
Eight analog inputs (CH0 IN to CH7 IN)
Eight digital I/O lines(DIO0 to DIO7)
One external event counter input (CTR)
One SYNC I/O terminal for external clocking and multi-unit synchronization (SYNC)
One external trigger input (TRIG_IN)
One power output (PC+5 V)
11 analog ground (AGND) and eight digital ground (GND) connections
Use 16 AWG to 30 AWG wire when making connections to the screw terminals. Pinout locations are shown in
Figure 3.
10
USB-1608FS-Plus User's Guide Functional Details
Element
Channel
Range
0
CH0
BIP1V
1
CH2
BIP2V
2
CH4
BIP10V
3
CH6
BIP1V
4
CH7
BIP5V
Figure 3. Screw terminal pinout
Signal connections
Analog input
You can connect up to eight analog input connections to the screw terminal containing pins 1 to 20 (CH0 IN
through CH7 IN.) Connect unused analog input terminals to ground terminals during operation. For example, if
you are not using terminal 15 (CH7 IN), connect this terminal to terminal 16 (AGND).
All analog input channels are configured for single-ended input mode. All analog input signals are referenced to
ground (AGND):
Connect the wire carrying the signal to be measured to CH# IN.
Connect the second wire to AGND.
The input voltage ranges are ±10 V, ±5 V, ±2.0 V, ±1.0 V.
For more information on analog signal connections
For more information on single-ended inputs, refer to the Guide to Signal Connections (this document is
available on our web site at www.mccdaq.com/pdfs/DAQ-Signal-Connections.pdf.
Channel-Gain queue
The channel-gain queue feature allows you to configure a different gain setting for each channel. The gain
settings are stored in a channel-gain queue list that is written to local memory on the device.
The channel-gain queue list can contain up to eight unique elements. The channel list must be in increasing
order. An example of a five element list is shown in the table below.
Sample channel-gain queue list
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USB-1608FS-Plus User's Guide Functional Details
Carefully match the gain to the expected voltage range on the associated channel or an over range condition
may occur. Although this condition does not damage the device, it does produce a useless full-scale reading,
and can introduce a long recovery time due to saturation of the input channel.
Digital I/O
You can connect up to eight digital I/O lines to DIO0 through DIO7. Each digital channel is individually
configurable for input or output. During initial power on or reset the digital pins are set for input.
The digital I/O terminals can detect the state of any TTL-level input. Refer to the schematic shown in Figure 4.
Figure 4. Schematic showing switch detection by digital channel DIO0
If you set the switch to the +5 V input, DIO0 reads TRUE (1). When set to GND, DIO0 reads FALSE (0).
Pull-up/down configuration
All digital I/O lines are pulled up to USB +5V (HI) with a 47 kΩ resistor (default). You can change the
pull-up/down configuration using the internal jumper labeled DIO. You must remove the device housing to
access the jumper on the circuit board.
To set the jumper for pull-up or pull-down, complete the following steps.
1. Unplug the device from the computer.
2. Turn the device over and rest the top of the housing on a flat, stable surface.
Caution! The discharge of static electricity can damage some electronic components. Before removing the
USB-1608FS-Plus from its housing, ground yourself using a wrist strap or touch the computer
chassis or other grounded object to eliminate any stored static charge.
3. Remove the three screws from the bottom of the device using a #1 Philips head screwdriver.
4. Hold both the top and bottom sections together, turn the device over and rest it on the surface, then
carefully remove the top section of the case to expose the circuit board.
Figure 5 shows the location of the DIO jumper on the circuit board.
Figure 5. Pull-up/down jumper location
5. Configure the jumper for pull-up or pull-down, as shown in Figure 6.
Figure 6. Pull-up/down jumper configuration
12
USB-1608FS-Plus User's Guide Functional Details
6. Replace the top section of the housing, and fasten it to the bottom section with the three screws.
For more information on digital signal connections
For general information regarding digital signal connections and digital I/O techniques, refer to the Guide to
Signal Connections (available on our web site at www.mccdaq.com/pdfs/DAQ-Signal-Connections.pdf).
Counter input
The CTR terminal is a 32-bit event counter that can accept frequency inputs up to 1 MHz. The internal counter
increments when the TTL levels transition from low to high.
SYNC I/O
The SYNC terminal is a bidirectional I/O signal that can be configured as an input (default) or an output.
Configure as an external clock input to pace the A/D conversions from an external source. The SYNC
terminal supports TTL-level input signals of up to 100 kHz.
Configure as an output that may be used to pace conversions on a second device and acquire data from
16 channels. Refer to page 15 for more information about synchronized operations.
Trigger input
The TRIG_IN terminal is an external digital trigger input. The trigger mode is software-selectable for edge or
level sensitive. Edge sensitive mode is selectable for rising or falling. Level sensitive mode is selectable for
high or low.
Reserved
The RSVD terminal is reserved for future use.
Ground
The analog ground (AGND) terminals provide a common ground for all analog channels.
The digital ground (GND) terminals provide a common ground for the digital, trigger, counter, and sync
channels and the power terminal.
Power output
The PC +5V output terminal can output up to 200 mA maximum. You can use this terminal to supply power to
external devices or circuitry.
Caution! The PC +5V terminal is an output. Do not connect it to an external power supply or you may
damage the device and possibly the computer.
The maximum output current that can be drawn by the USB-1608FS-Plus is 500 mA. This maximum applies to
most personal computers and self-powered USB hubs. Bus-powered hubs and notebook computers may limit
the maximum available output current to 100 mA. If the current requirement of the device exceeds the current
available from the computer, connect to a self-powered hub or power the computer with an external power
adapter.
When running applications with the device, each DIO bit can source up to 24 mA. The total amount of current
that can be sourced from the PC +5V, SYNC, and digital outputs is 200 mA max.
Accuracy
The overall accuracy of any instrument is limited by the error components within the system. Resolution is
often used incorrectly to quantify the performance of a measurement product. While "16-bits" or "1 part in
65,536" does indicate what can be resolved, it provides little insight into the quality, or accuracy, of an absolute
measurement. Accuracy specifications describe the actual measurement achievable with a USB-1608FS-Plus.
Accuracy specifications are listed on page 17.
13
USB-1608FS-Plus User's Guide Functional Details
There are three types of errors which affect the accuracy of a measurement system:
offset
gain
nonlinearity
The primary error sources in a USB-1608FS-Plus are offset and gain. Nonlinearity is small, and is not
significant as an error source with respect to offset and gain.
Figure 7 shows an ideal, error-free transfer function. The typical calibrated accuracy of a USB-1608FS-Plus is
range-dependent. We use a ±10 V range as an example of what you can expect when performing a measurement
in this range.
Figure 7. Ideal ADC transfer function
The offset error is measured at mid-scale. Ideally, a zero volt input should produce an output code of 32,768.
Any deviation from this is an offset error. Figure 8 shows the transfer function with an offset error. The typical
offset error specification for a USB-1608FS-Plus on the ±10 V range is ±1.66 mV. Offset error affects all codes
equally by shifting the entire transfer function up or down along the input voltage axis.
The accuracy plots in Figure 8 are drawn for clarity and are not drawn to scale.
Figure 8. ADC transfer function with offset error
Gain error is a change in the slope of the transfer function from the ideal, and is typically expressed as a
percentage of full-scale. Figure 9 shows the USB-1608FS-Plustransfer function with gain error. Gain error is
easily converted to voltage by multiplying the full-scale input (±10 V) by the error.
14
USB-1608FS-Plus User's Guide Functional Details
The accuracy plots in Figure 9 are drawn for clarity and are not drawn to scale.
Figure 9. ADC Transfer function with gain error
For example, a USB-1608FS-Plus exhibits a typical calibrated gain error of ±0.04% on all ranges. For the
±10 V range, this would yield 10 V × ±0.0002 = ±4 mV. This means that at full scale, neglecting the effect of
offset for the moment, the measurement would be within 4 mV of the actual value. Note that gain error is
expressed as a ratio. Values near ±FS (±10 V) are more affected from an absolute voltage standpoint than are
values near mid-scale, which see little or no voltage error.
Combining these two error sources in Figure 10, we have a plot of the error band at ±full scale (±10 V). This
plot is a graphical version of the typical accuracy specification of the product.
The accuracy plots in Figure 10 are drawn for clarity and are not drawn to scale.
Figure 10. Error band plot
Synchronized operations
You can connect the SYNC pin of multiple devices together in a master/slave configuration and acquire data
from the analog inputs of all devices using one clock.
When the SYNC pin is configured as an output, the internal A/D pacer clock signal is sent to the screw
terminal. You can output the clock to the SYNC pin of another device that is configured for A/D pacer input.
15
USB-1608FS-Plus User's Guide Functional Details
Mechanical drawings
Figure 11. USB-1608FS-Plus circuit board (top) and enclosure dimensions
16
Parameter
Condition
Specification
A/D converter type
16-bit successive approximation type
Number of channels
8 single-ended
Input configuration
Individual A/D per channel
Sampling method
Simultaneous
Absolute maximum input voltage
CHx IN relative to GND
±15 V max
Input impedance
100 MΩ min
Input ranges
Software-selectable per channel
±10 V, ±5 V, ±2 V, ±1 V
Sampling rate
Hardware paced
0.01 S/s to 100 kS/s, software-selectable
Throughput
Software paced
500 S/s all channels
Hardware paced (Note 1)
(400 kS/s) / (# of channels) max,
100 kS/s max for any channel
BURSTIO ≤ 32,768 total samples
(uses onboard FIFO)
(800 kS/s) / (# of channels) max,
100 kS/s max for any channel
Gain queue
Software configurable. Up to eight
elements – one gain element per unique,
ordered channel.
Resolution
16 bits
No missing codes
16 bits
Crosstalk
Signal DC to 25 kHz
–80 dB
Trigger source
Software-selectable
External digital: TRIG_IN
Range
Accuracy (mV)
±10 V
5.66
±5 V
2.98
±2 V
1.31
±1 V
0.68
Specifications
All specifications are subject to change without notice.
Typical for 25°C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Analog input
Table 1. General analog input specifications
Chapter 4
Note 1: Maximum throughput when scanning in hardware paced mode is machine dependent.
Accuracy
Analog input DC voltage measurement accuracy
Table 2. Calibrated absolute accuracy
17
USB-1608FS-Plus User's Guide Specifications
Range
Gain error
(% of Reading)
Gain error at FS
(mV)
Offset (mV)
±10 V
0.04
4.00
1.66
±5 V
0.04
2.00
0.98
±2 V
0.04
0.80
0.51
±1 V
0.04
0.40
0.28
Range
Typical counts
LSBrms
±10 V
10
1.52
±5 V
10
1.52
±2 V
11
1.67
±1 V
14
2.12
Parameter
Specification
Digital type
5V TTL
Number of I/O
8 (DIO0 through DIO7)
Configuration
Independently configured for input or output
Pull-up/pull-down
configuration
All pins pulled up to 5V via 47 K resistors (default).
May be changed to pull-down using an internal jumper.
Input high voltage
threshold
2.0 V min
Input high voltage limit
5.5 V absolute max
Input low voltage
threshold
0.8 V max
Input low voltage limit
–0.5 V absolute min
0 V recommended min
Output high voltage
4.4 V min (IOH = –50 µA)
3.76 V min (IOH = –24 mA)
Output low voltage
0.1 V max (IOL = 50 µA)
0.44 V max (IOL = 24 mA)
Power on and reset state
Input
Table 3. Accuracy components - All values are (±)
Noise performance
Table 4. Noise performance
Table 4 summarizes the noise performance for the USB-1608FS-Plus. Noise distribution is determined by
gathering 50 K samples with inputs tied to ground at the user connector. Samples are gathered at the maximum
specified sampling rate of 100 kS/s.
Digital input/output
Table 5. Digital I/O specifications
18
USB-1608FS-Plus User's Guide Specifications
Parameter
Condition
Specification
Trigger source
External digital
TRIG_IN
Trigger mode
Software-selectable
Edge or level sensitive: user configurable for CMOS
compatible rising or falling edge, high or low level.
Trigger latency
2 µs + 1 pacer clock cycle max
Trigger pulse width
1µs min
Input type
Schmitt trigger, 47 kΩ pull-down to ground
Schmitt trigger hysteresis
1.01 V typ
0.6 V min
1.5 V max
Input high voltage threshold
2.43 V typ
1.9 V min
3.1V max
Input high voltage limit
5.5 V absolute max
Input low voltage threshold
1.42 V typ
1.0 V min
2.0 V max
Input low voltage limit
-0.5 V absolute min
0 V recommended min
Parameter
Condition
Specification
Pin name
SYNC
Pin type
Bidirectional
Direction, software-selectable
Input
Receives A/D pacer clock from external source
Output
Outputs internal A/D pacer clock
Input clock rate
100 kHz, max
Clock pulse width
Input
1 µs min
Output
4 µs min
Input clock mode
Edge sensitive, rising
Input type
Schmitt trigger, 47 kΩ pull-down to ground
Schmitt trigger hysteresis
1.01 V typ
0.6 V min
1.5 V max
Input high voltage threshold
2.43 V typ
1.9 V min
3.1V max
Input high voltage limit
5.5 V absolute max
Input low voltage threshold
1.42 V typ
1.0 V min
2.0 V max
Input low voltage limit
-0.5 V absolute min
0 V recommended min
Output high voltage
4.4 V min (IOH = –50 µA)
3.80 V min (IOH = –8 mA)
Output low voltage
0.1 V max (IOL = 50 µA)
0.44 V max (IOL = 8 mA)
External trigger
Table 6. External trigger specifications
External clock input/output
Table 7. External clock I/O specifications
19
USB-1608FS-Plus User's Guide Specifications
Parameter
Specification
Pin name
CTR
Counter type
Event counter
Number of channels
1
Input type
Schmitt trigger, 47 kΩ pull-down to ground
Input source
CTR screw terminal
Resolution
32 bits
Schmitt trigger hysteresis
1.01 V typ
0.6 V min
1.5 V max
Input high voltage threshold
2.43 V typ
1.9 V min
3.1V max
Input high voltage limit
5.5 V absolute max
Input low voltage threshold
1.42 V typ
1.0 V min
2.0 V max
Input low voltage limit
-0.5 V absolute min
0 V recommended min
Input frequency
1 MHz max
High pulse width
500 ns min
Low pulse width
500 ns min
Parameter
Specification
Data FIFO
32,768 samples, 65,536 bytes
EEPROM
2,048 bytes (768 bytes calibration, 256 bytes user, 1,024 bytes DAQFlex)
Parameter
Specification
Type
High performance 32-bit RISC microcontroller
Counter section
Table 8. Counter specifications
Memory
Microcontroller
Table 9. Memory specifications
Table 10. Microcontroller specifications
20
USB-1608FS-Plus User's Guide Specifications
Parameter
Condition
Specification
Supply current
USB enumeration
< 100 mA
Supply current
Including DIO and SYNC output loading
< 500 mA
+5V power available (Note 2)
Connected to externally-powered root port hub or a
self-powered hub
4.5 V min, 5.25 V max
Output current (Note 3)
200 mA max
Parameter
Specification
Device type
USB 2.0 (full-speed)
Device compatibility
USB 1.1, USB 2.0
Parameter
Specification
Operating temperature range
0 °C to 70 °C
Storage temperature range
–40 °C to 70 °C
Humidity
0% to 90% non-condensing
Parameter
Specification
Dimensions (L × W × H)
79 × 82 × 27 mm (3.10 × 3.20 × 1.05 in.)
USB cable length
3 m (9.84 ft) max
User connection length
3 m (9.84 ft) max
Power
Table 11. Power specifications
Note 2: "Self-powered hub" refers to a USB hub with an external power supply. Self-powered hubs allow a
connected USB device to draw up to 500 mA. "Root port hubs" reside in the PC USB host Controller.
The USB port(s) on your PC are root port hubs. All externally-powered root port hubs, such as a
desktop PC, provide up to 500 mA of current for a USB device. Battery-powered root port hubs
provide 100 mA or 500 mA, depending upon the manufacturer. A laptop PC that is not connected to an
external power adapter is an example of a battery-powered root port hub. If your laptop PC is
constrained to the 100 mA maximum, you need to purchase a self-powered hub.
Note 3: Output current is the total amount of current that can be sourced from the PC +5V, SYNC, and digital
outputs.
General
Environmental
Mechanical
Table 12. General specifications
Table 13. Environmental specifications
Table 14. Mechanical specifications
21
USB-1608FS-Plus User's Guide Specifications
Parameter
Specification
Connector type
Screw terminal
Wire gauge range
16 AWG to 30 AWG
Pin
Signal Name
Pin
Signal Name
1
CH0 IN
21
DIO0
2
AGND
22
GND
3
CH1 IN
23
DIO1
4
AGND
24
GND
5
CH2 IN
25
DIO2
6
AGND
26
GND
7
CH3 IN
27
DIO3
8
AGND
28
GND
9
CH4 IN
29
DIO4
10
AGND
30
GND
11
CH5 IN
31
DIO5
12
AGND
32
GND
13
CH6 IN
33
DIO6
14
AGND
34
GND
15
CH7 IN
35
DIO7
16
AGND
36
SYNC
17
RSVD
37
TRIG_IN
18
AGND
38
CTR
19
AGND
39
PC +5V
20
AGND
40
GND
Screw terminal connector and pinout
Table 15. Connector specifications
Table 16. Connector pinout
22
Declaration of Conformity
Manufacturer: Measurement Computing Corporation
Address: 10 Commerce Way
Suite 1008
Norton, MA 02766
USA
Category: Electrical equipment for measurement, control and laboratory use.
Measurement Computing Corporation declares under sole responsibility that the product
USB-1608FS-Plus
to which this declaration relates is in conformity with the relevant provisions of the following standards or other
documents:
EC EMC Directive 2004/108/EC: General Requirements, EN 61326-1:2006 (IEC 61326-1:2005).
Emissions:
EN 55011 (2007) / CISPR 11(2003): Radiated emissions: Group 1, Class A
EN 55011 (2007) / CISPR 11(2003): Conducted emissions: Group 1, Class A
Immunity: EN 61326-1:2006, Table 3.
IEC 61000-4-2 (2001): Electrostatic Discharge immunity.
IEC 61000-4-3 (2002): Radiated Electromagnetic Field immunity.
To maintain compliance to the standards of this declaration, the following conditions must be met.
The host computer, peripheral equipment, power sources, and expansion hardware must be CE compliant.
All I/O cables must be shielded, with the shields connected to ground.
I/O cables must be less than 3 meters (9.75 feet) in length.
The host computer must be properly grounded.
The host computer must be USB 2.0 compliant.
Equipment must be operated in a controlled electromagnetic environment as defined by Standards EN
61326-1:2006, or IEC 61326-1:2005.
Note: Data acquisition equipment may exhibit noise or increased offsets when exposed to high RF fields
(>1V/m) or transients.
Declaration of Conformity based on tests conducted by Chomerics Test Services, Woburn, MA 01801, USA in
September, 2011. Test records are outlined in Chomerics Test Report #EMI5948.11. Further testing was
conducted by Chomerics Test Services, Woburn, MA. 01801, USA in December, 2011. Test records are
outlined in Chomerics Test Report #EMI5996.11.
We hereby declare that the equipment specified conforms to the above Directives and Standards.
Carl Haapaoja, Director of Quality Assurance
Measurement Computing Corporation
www.mccdaq.com
NI Hungary Kft
10 Commerce Way
Norton, Massachusetts 02766
(508) 946-5100
Fax: (508) 946-9500
E-mail:
info@mccdaq.com
H-4031 Debrecen, Hátar út 1/A, Hungary
Phone: +36 (52) 515400
Fax: +36 (52) 515414
http://hungary.ni.com/debrecen
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