USB-TC
User's Guide
Document Revision 9
January 2014
© Copyright 2014
Thermocouple Measurement
HM USB-TC.docx
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2
Table of Contents
Preface
About this User’s Guide ....................................................................................................................... 5
Conventions in this user's guide ......................................................................................................................... 5
Where to find more information ......................................................................................................................... 5
Chapter 1
Introducing the USB-TC ....................................................................................................................... 6
Overview: USB-TC features............................................................................................................................... 6
Functional block diagram ................................................................................................................................... 6
Connecting a USB-TC to your computer is easy ................................................................................................ 7
Chapter 2
Installing the USB-TC ........................................................................................................................... 8
What comes with your shipment? ....................................................................................................................... 8
Hardware .......................................................................................................................................................................... 8
Software ............................................................................................................................................................................ 8
Documentation .................................................................................................................................................................. 8
Unpacking........................................................................................................................................................... 8
Installing the software ........................................................................................................................................ 8
Installing the hardware ....................................................................................................................................... 8
Configuring the hardware ................................................................................................................................... 9
Calibrating the hardware..................................................................................................................................... 9
Chapter 3
Sensor Connections ........................................................................................................................... 10
Screw terminal pinout ....................................................................................................................................... 10
Thermocouple input .........................................................................................................................................................10
CJC sensors ......................................................................................................................................................................10
Digital I/O ........................................................................................................................................................................11
Power output ....................................................................................................................................................................11
Ground ................................................................................................................................................................ .............11
Thermocouple connections ............................................................................................................................... 11
Wiring configuration ........................................................................................................................................................11
Digital I/O connections ..................................................................................................................................... 12
Chapter 4
Functional Details ............................................................................................................................... 13
Thermocouple measurements ........................................................................................................................... 13
Cold junction compensation (CJC) ..................................................................................................................................13
Data linearization .............................................................................................................................................................13
Open-thermocouple detection (OTD) ..............................................................................................................................13
USB connector .................................................................................................................................................. 14
LED .................................................................................................................................................................. 14
Power ................................................................................................................................................................ 14
Chapter 5
Specifications ...................................................................................................................................... 15
Analog input ..................................................................................................................................................... 15
Channel configurations ..................................................................................................................................... 15
Accuracy ........................................................................................................................................................... 16
Thermocouple measurement accuracy ............................................................................................................................. 16
Throughput rate ................................................................................................................................................ 16
Digital input/output........................................................................................................................................... 17
3
USB-TC User's Guide
Memory ............................................................................................................................................................ 17
Microcontroller ................................................................................................................................................. 17
USB +5V voltage ............................................................................................................................................. 17
Power ................................................................................................................................................................ 18
USB specifications ........................................................................................................................................... 18
Environmental .................................................................................................................................................. 18
Mechanical ....................................................................................................................................................... 18
Signal connector ............................................................................................................................................... 19
Declaration of Conformity .................................................................................................................. 20
4
Preface
About this User’s Guide
This user's guide describes the Measurement Computing USB-TC data acquisition device and lists device
specifications.
Conventions in this user's guide
For more information
Text presented in a box signifies additional information related to the subject matter.
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 USB-TC hardware 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
Phone: 508-946-5100 and follow the instructions for reaching Tech Support
Fax: 508-946-9500 to the attention of Tech Support
Email: techsupport@mccdaq.com
5
Chapter 1
Introducing the USB-TC
Overview: USB-TC features
The USB-TC is a USB 2.0 full-speed, thermocouple input module that is supported under popular Microsoft®
Windows® operating systems. The USB-TC is fully compatible with both USB 1.1 and USB 2.0 ports.
The USB-TC provides eight differential thermocouple input channels. Eight independent, TTL-compatible
digital I/O channels are provided to monitor TTL-level inputs, communicate with external devices, and to
generate alarms. The digital I/O channels are software programmable for input or output.
With the USB-TC, you can take measurements from type J, K, R, S, T, N, E, and B thermocouples.
The USB-TC provides two integrated cold junction compensation (CJC) sensors for thermocouple
measurements.
An open thermocouple detection feature lets you detect a broken thermocouple. An on-board microprocessor
automatically linearizes the measurement data.
The USB-TC is a standalone plug-and-play module which draws power from the USB cable. No external power
supply is required. All configurable options are software programmable.
The USB-TC is fully software calibrated.
Functional block diagram
USB-TC functions are illustrated in the block diagram shown here.
Figure 1. Functional block diagram
6
USB-TC User's Guide Introducing the USB-TC
Connecting a USB-TC to your computer is easy
Installing a data acquisition device has never been easier.
The USB-TC relies upon the Microsoft Human Interface Device (HID) class drivers. The HID class drivers
ship with every copy of Windows that is designed to work with USB ports. We use the Microsoft HID
because it is a standard, and its performance delivers full control and maximizes data transfer rates for your
USB-TC. No third-party device driver is required.
The USB-TC is plug-and-play. There are no jumpers to position, DIP switches to set, or interrupts to
configure.
You can connect the USB-TC before or after you install the software, and without powering down your
computer first. When you connect an HID to your system, your computer automatically detects it and
configures the necessary software. You can connect and power multiple HID peripherals to your system
using a USB hub.
You can connect your system to various devices using a standard four-wire cable. The USB connector
replaces the serial and parallel port connectors with one standardized plug and port combination.
You do not need a separate power supply module. The USB automatically delivers the electrical power
required by each peripheral connected to your system.
Data can flow two ways between a computer and peripheral over USB connections.
7
Chapter 2
Installing the USB-TC
What comes with your shipment?
The following items are shipped with the USB-TC:
Hardware
USB-TC
USB cable
Software
MCC DAQ CD
Documentation
In addition to this hardware user's guide, you should also receive the Quick Start Guide. This 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.
Unpacking
As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the USB-TC 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.
If any components are missing or damaged, contact us immediately using one of the following methods:
Knowledgebase: kb.mccdaq.com
Phone: 508-946-5100 and follow the instructions for reaching Tech Support
Fax: 508-946-9500 to the attention of Tech Support
Email: techsupport@mccdaq.com
For international customers, contact your local distributor. Refer to the International Distributors section on our
website at www.mccdaq.com/International.
Installing the software
Refer to the Quick Start Guide for instructions on installing the software on the MCC DAQ CD. This booklet is
available in PDF at www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf.
Installing the hardware
To connect the USB-TC to your system, turn your computer on, and connect the USB cable to a USB port on
your computer or to an external USB hub that is connected to your computer. The USB cable provides power
and communication to the USB-TC.
When you connect the USB-TC to a computer 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 USB LED should
blink and then remain on. This indicates that communication is established between the USB-TC and your
computer.
Caution! Do not disconnect any device from the USB bus while the computer is communicating with the
USB-TC, or you may lose data and/or your ability to communicate with the USB-TC.
8
USB-TC User's Guide Installing the USB-TC
If the LED turns off
If the LED is on but then turns off, the computer has lost communication with the USB-TC. To restore
communication, disconnect the USB cable from the computer, and then reconnect it. This should restore
communication, and the LED should turn back on.
Configuring the hardware
All hardware configuration options on the USB-TC are programmable with software. Use InstaCal to set the
thermocouple type for each channel pair. Configuration options are stored on the USB-TC 's isolated
microcontroller in EEPROM, which is non-volatile memory on the USB-TC module. Configuration options are
loaded on power up. The factory default configuration is Type J thermocouple.
Warm up
Allow the USB-TC to warm up for 30 minutes before taking measurements. This warm up time minimizes
thermal drift and achieves the specified rated accuracy of measurements.
Calibrating the hardware
The USB-TC is fully calibrated via InstaCal. Allow a 30 minute warm up before calibrating.
9
Chapter 3
Sensor Connections
The USB-TC supports type J, K, R, S, T, N, E, and B thermocouples.
Thermocouple selection
The thermocouple type you select will depend on your application needs. Review the temperature ranges and
accuracies of each type to determine which is best suited for your application.
Screw terminal pinout
The USB-TC has four rows of screw terminals — two rows on the top edge of the housing, and two rows on the
bottom edge. Each row has 26 connections. Between each bank of screw terminals are two integrated CJC
sensors used for thermocouple measurements. Signals are identified in Figure 2.
Figure 2. Screw terminal pinout
Use 16 AWG to 30 AWG wire for your signal connections.
Tighten screw terminal connections
When making connections to the screw terminals, be sure to tighten the screw until tight. Simply touching the
top of the screw terminal is not sufficient to make a proper connection.
Thermocouple input
You can connect up to eight thermocouples to the differential sensor inputs (C0H/C0L to C7H/C7L). The device
supports type J, K, R, S, T, N, E, and B thermocouples.
CJC sensors
The USB-TC has two built in high-resolution temperature sensors. One sensor is located on the right side of the
package, and one sensor is located at the left side.
10
USB-TC User's Guide Sensor Connections
Digital I/O
You can connect up to eight digital I/O lines to the screw terminals labeled DIO0 to DIO7. Each terminal is
software configurable for input or output.
Power output
The two +5V terminals are isolated (500 VDC) from the USB +5V.
Caution! Each +5V terminal is an output. Do not connect to an external power supply or you may damage
the USB-TC and possibly the computer.
Ground
The six analog ground terminals (GND) provide a common ground for the input channels and DIO bits and are
isolated (500 VDC) from the USB GND.
Thermocouple connections
A thermocouple consists of two dissimilar metals that are joined together at one end. When the junction of the
metals is heated or cooled, a voltage is produced that correlates to temperature.
The USB-TC makes fully differential thermocouple measurements without the need of ground-referencing
resistors. A 32-bit floating point value in either a voltage or temperature format is returned by software. An
open thermocouple detection feature is available for each analog input which automatically detects an open or
broken thermocouple.
Use InstaCal to select the thermocouple type (J, K, R, S, T, N, E, and B) and one or more sensor input channels
to connect the thermocouple.
Wiring configuration
Connect the thermocouple to the USB-TC using a differential configuration, as shown in Figure 3.
Figure 3. Typical thermocouple connection
Connect thermocouples to the USB-TC such that they are floating with respect to GND (pins 9, 19, 28, 38). The
USB-TC GND pins are isolated from earth ground, so connecting thermocouple sensors to voltages referenced
to earth ground is permissible as long as the isolation between the GND pins (9, 19, 28, 38) and earth ground is
maintained.
When thermocouples are attached to conductive surfaces, the voltage differential between multiple
thermocouples must remain within ±1.4 V. For best results, we recommend the use of insulated or ungrounded
thermocouples when possible.
Maximum input voltage between analog input and ground
The absolute maximum input voltage between an analog input and the isolated GND pins is ±25 VDC when the
device is powered on, and ±40 VDC when the device is powered off.
If you need to increase the length of your thermocouple, use the same type of thermocouple wires to minimize
the error introduced by thermal EMFs.
11
USB-TC User's Guide Sensor Connections
Digital I/O connections
You can connect up to eight digital I/O lines to the screw terminals labeled DIO0 to DIO7. You can configure
each digital bit for either input or output. All digital I/O lines are pulled up to +5V with a 47 kΩ resistor
(default). You can request the factory to configure the resistor for pull-down to ground if desired.
When you configure the digital bits for input, you can use the USB-TC digital I/O terminals to detect the state
of any TTL-level input. Refer to the schematic shown in Figure 4. If you set the switch to the +5V input, DIO0
reads TRUE (1). If you move the switch to GND, DIO0 reads FALSE (0).
Figure 4. Schematic showing switch detection by digital channel DIO0
All ground pins are isolated from earth ground. If a connection is made to earth ground when using digital I/O
and conductive thermocouples, the thermocouples are no longer isolated. In this case, thermocouples must not
be connected to any conductive surfaces that may be referenced to earth ground
For general information regarding digital signal connections and digital I/O techniques, refer to the Guide to
DAQ Signal Connections (available on our web site at www.mccdaq.com/signals/signals.pdf).
12
Chapter 4
Functional Details
Thermocouple measurements
A thermocouple consists of two dissimilar metals that are joined together at one end. When the junction of the
metals is heated or cooled, a voltage is produced that correlates to temperature.
The USB-TC hardware level-shifts the thermocouple’s output voltage into the A/D’s common mode input range
by applying +2.5 V to the thermocouple’s low side at the C#L input. Always connect thermocouple sensors to
the USB-TC in a floating fashion. Do not attempt to connect the thermocouple low side C#L to GND or to a
ground referencing resistor.
Cold junction compensation (CJC)
When you connect the thermocouple sensor leads to the sensor input channel, the dissimilar metals at the USBTC terminal blocks produce an additional thermocouple junction. This junction creates a small voltage error
term which must be removed from the overall sensor measurement using a cold junction compensation
technique. The measured voltage includes both the thermocouple voltage and the cold junction voltage. To
compensate for the additional cold junction voltage, the USB-TC subtracts the cold junction voltage from the
thermocouple voltage.
The USB-TC has two high-resolution temperature sensors that are integrated into the design of the USB-TC.
One sensor is located on the right side of the package, and one sensor is located at the left side. The CJC sensors
measure the average temperature at the terminal blocks so that the cold junction voltage can be calculated. A
software algorithm automatically corrects for the additional thermocouples created at the terminal blocks by
subtracting the calculated cold junction voltage from the analog input's thermocouple voltage measurement.
Increasing the thermocouple length
If you need to increase the length of your thermocouple, use the same type of thermocouple wires to minimize
the error introduced by thermal EMFs.
Data linearization
After the CJC correction is performed on the measurement data, an on-board microcontroller automatically
linearizes the thermocouple measurement data using National Institute of Standards and Technology (NIST)
linearization coefficients for the selected thermocouple type.
The measurement data is then output as a 32-bit floating point value in the configured format (voltage or
temperature).
Open-thermocouple detection (OTD)
The USB-TC is equipped with an open-thermocouple detection for each analog input channel. With OTD, any
open-circuit or short-circuit condition at the thermocouple sensor is detected by the software. An open channel
is detected by driving the input voltage to a negative value outside the range of any thermocouple output. The
software recognizes this as an invalid reading and flags the appropriate channel. The software continues to
sample all channels when OTD is detected.
Input leakage current
With open-thermocouple detection enabled, 105 nA (max.) of input leakage current is injected into the
thermocouple. This current can cause an error voltage to develop across the lead resistance of the thermocouple
that is indistinguishable from the thermocouple voltage you are measuring. You can estimate this error voltage
with the following formula:
error voltage = resistance of the thermocouple × 105 nA
To reduce the error, reduce the length of the thermocouple to lower its resistance, or lower the AWG of the wire
by using a wire with a larger diameter. With open-thermocouple detection disabled, 30 nA (max.) of input
leakage current is injected into the thermocouple.
13
USB-TC User's Guide Functional Details
LED
Illumination
Indication
Steady green
The USB-TC is connected to a computer or external USB hub.
Blinking green
Data is being transferred.
Upon connection, the LED blinks three times and then remains on; this indicates a successful
installation.
USB connector
The USB connector provides +5V power and communication. No external power supply is required.
LED
The LED indicates the communication status of the USB-TC. It uses up to 5 mA of current. The table below
defines the function of the USB-TC LED.
Illumination
Power
The two +5V terminals are isolated (500 VDC) from the USB +5V.
Caution! Each +5V terminal is an output. Do not connect to an external power supply or you may damage
the USB-TC and possibly the computer.
14
Parameter
Condition
Specification
A/D converters
Four dual 24-bit, Sigma-Delta type
Number of channels
8 differential
Input isolation
500 VDC minimum between field wiring and USB
interface
Channel configuration
Thermocouple sensor type
Differential input voltage
range
Thermocouple
±0.080 V
Absolute maximum input
voltage
±C0x through ±C7x relative to
GND (pins 9, 19, 28, 38)
±24 V power on,
±24 V power off
Input impedance
5 GΩ, min
Input leakage current
Open thermocouple detect enabled
105 nA max
Normal mode rejection ratio
fIN = 60 Hz
90 dB min
Common mode rejection ratio
fIN = 50 Hz/60 Hz
100 dB min
Resolution
24 bits
No missing codes
24 bits
Input coupling
DC
Warm-up time
30 minutes min
Open thermocouple detect
Automatically enabled when the channel pair is
configured for thermocouple sensors.
The maximum open detection time is 3 seconds.
CJC sensor accuracy
15 °C to 35 °C
±0.25 °C typ,
±0.5 °C max
0 °C to 70 °C
–1.0 to +0.5 °C max
Sensor Category
Condition
Specification
Thermocouple
J, K, S, R, B, E, T, or N
8 differential channels
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. Generic analog input specifications
Chapter 5
Channel configurations
Note 1: Channel configuration information is stored in the EEPROM of the isolated microcontroller by the
firmware whenever any item is modified. Modification is performed by commands issued over USB
from an external application, and the configuration is made non-volatile through the use of the
EEPROM.
Note 2: The factory default configuration is Type J.
Table 2. Channel configuration specifications
15
USB-TC User's Guide Specifications
Sensor Type
Maximum error (°C)
Typical error (°C)
Temperature range (°C)
J
±1.499
±0.507
–210 to 0
±0.643
±0.312
0 to 1200
K
±1.761
±0.538
–210 to 0
±0.691
±0.345
0 to 1372
S
±2.491
±0.648
–50 to 250
±1.841
±0.399
250 to 1768.1
R
±2.653
±0.650
–50 to 250
±1.070
±0.358
250 to 1768.1
B
±1.779
±0.581
250 to 700
±0.912
±0.369
700 to 1820
E
±1.471
±0.462
–200 to 0
±0.639
±0.245
0 to 1000
T
±1.717
±0.514
–200 to 0
±0.713
±0.256
0 to 600
N
±1.969
±0.502
–200 to 0
±0.769
±0.272
0 to 1300
Number of input channels
Maximum throughput
1
2 S/s
2
2 S/s on each channel, 4 S/s total
3
2 S/s on each channel, 6 S/s total
4
2 S/s on each channel, 8 S/s total
5
2 S/s on each channel, 10 S/s total
6
2 S/s on each channel, 12 S/s total
7
2 S/s on each channel, 14 S/s total
8
2 S/s on each channel, 16 S/s total
Accuracy
Thermocouple measurement accuracy
Table 3. Thermocouple accuracy specifications, including CJC measurement error
Note 3: Thermocouple specifications include linearization, cold-junction compensation and system noise.
These specs are for one year, or 3000 operating hours, whichever comes first and for operation of the
device between 15 °C and 35 °C. For measurements outside this range, add ±0.5 degree to the
maximum error shown. There are CJC sensors on each side of the module. The accuracy listed above
assumes the screw terminals are at the same temperature as the CJC sensor. Errors shown do not
include inherent thermocouple error. Please contact your thermocouple supplier for details on the
actual thermocouple error.
Note 4: Thermocouples must be connected to the device such that they are floating with respect to GND.
The GND pins are isolated from earth ground, so connecting thermocouple sensors to voltages
referenced to earth ground is permissible as long as the isolation between the GND pins and earth
ground is maintained.
Note 5: When thermocouples are attached to conductive surfaces, the voltage differential between multiple
thermocouples must remain within ±1.4V. For best results we recommend the use of ungrounded or
insulated thermocouples when possible.
Throughput rate
Table 4. Throughput rate specifications
16
USB-TC User's Guide Specifications
Parameter
Specification
Digital type
CMOS
Number of I/O
8 (DIO0 through DIO7)
Configuration
Independently configured for input or output.
Power on reset is input mode.
Pull-up/pull-down configuration
All pins pulled up to +5 V via 47 K resistors (default). Pull-down to ground (GND)
also available.
Digital I/O transfer rate
(software paced)
Digital input: 50 port reads or single bit reads per second, typ
Digital output: 100 port writes or single bit writes per second, typ
Input high voltage
2.0 V min, 5.5 V absolute max
Input low voltage
0.8 V max, –0.5 V absolute min
Output low voltage
(IOL = 2.5 mA)
0.7 V max
Output high voltage
(IOH = –2.5 mA)
3.8 V min
Parameter
Specification
EEPROM
1,024 bytes isolated micro reserved for sensor configuration
256 bytes USB micro for external application use
Parameter
Specification
Type
Two high performance 8-bit RISC microcontrollers
Parameter
Specification
USB +5V (VBUS) input
voltage range
4.75 V min to 5.25 V max
Note 6: The analog inputs are configured to run continuously. Each channel is sampled twice per second.
The maximum latency between when a sample is acquired and the temperature data is provided by
the USB unit is approximately 0.5 seconds.
Digital input/output
Table 5. Digital input/output specifications
Note 7: All ground pins are isolated from earth ground. If a connection is made to earth ground when using
digital I/O and conductive thermocouples, the thermocouples are no longer isolated. In this case,
thermocouples must not be connected to any conductive surfaces that may be referenced to earth
ground.
Memory
Table 6. Memory specifications
Microcontroller
Table 7. Microcontroller specifications
USB +5V voltage
Table 8. USB +5V voltage specifications
17
USB-TC User's Guide Specifications
Parameter
Condition
Specification
Supply current
USB enumeration
<100 mA
Supply current
(Note 8)
Continuous mode
140 mA typ
User +5V output voltage range
(pins 21 and 47)
Connected to self-powered hub. (Note 9)
4.75 V min to
5.25 V max
User +5V output current
(pins 21 and 47)
Bus-powered and connected to a self-powered hub. (Note 9)
10 mA max
Isolation
Measurement system to PC
500 VDC min
Parameter
Specification
USB device type
USB 2.0 (full-speed)
Device compatibility
USB 1.1, USB 2.0
Device power capability
Self-powered, 100 mA consumption max
USB cable type
A-B cable, UL type AWM 2725 or equivalent. (min 24 AWG VBUS/GND,
min 28 AWG D+/D–)
USB cable length
3 m (9.84 ft) max
Parameter
Specification
Operating temperature range
0 °C to 70 °C
Storage temperature range
–40 °C to 85 °C
Humidity
0% to 90% non-condensing
Parameter
Specification
Dimensions (L × W × H)
128.52 x 88.39 × 35.56 mm (5.06 × 3.48 × 1.43 ft)
User connection length
3 m (9.84 ft) max
Power
Table 9. Power specifications
Note 8: This is the total current requirement for the device which includes up to 10 mA for the status LED.
Note 9: 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 (desktop PC’s) 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.
USB specifications
Environmental
Mechanical
Table 10. USB specifications
Table 11. Environmental specifications
Table 12. Mechanical specifications
18
USB-TC User's Guide Specifications
Parameter
Specification
Connector type
Screw terminal
Wire gauge range
16 AWG to 30 AWG
Pin
Signal Name
Pin Description
Pin
Signal Name
Pin Description
1
RSVD
Reserved, Do Not Use
27
RSVD
Reserved, Do Not Use
2
NC
No connection
28
GND
Ground
3
C0H
CH0 sensor input (+)
29
C7L
CH7 sensor input (–)
4
C0L
CH0 sensor input (–)
30
C7H
CH7 sensor input (+)
5
NC
No connection
31
RSVD
Reserved, Do Not Use
6
RSVD
Reserved, Do Not Use
32
NC
No connection
7
C1H
CH1 sensor input (+)
33
C6L
CH6 sensor input (–)
8
C1L
CH1 sensor input (–)
34
C6H
CH6 sensor input (+)
9
GND
Ground
35
NC
No connection
10
RSVD
Reserved, Do Not Use
36
RSVD
Reserved, Do Not Use
CJC sensor
CJC sensor
11
RSVD
Reserved, Do Not Use
37
RSVD
Reserved, Do Not Use
12
NC
No connection
38
GND
Ground
13
C2H
CH2 sensor input (+)
39
C5L
CH5 sensor input (–)
14
C2L
CH2 sensor input (–)
40
C5H
CH5 sensor input (+)
15
NC
No connection
41
RSVD
Reserved, Do Not Use
16
RSVD
Reserved, Do Not Use
42
NC
No connection
17
C3H
CH3 sensor input (+)
43
C4L
CH4 sensor input (–)
18
C3L
CH3 sensor input (–)
44
C4H
CH4 sensor input (+)
19
GND
Ground
45
NC
No connection
20
RSVD
Reserved, Do Not Use
46
RSVD
Reserved, Do Not Use
21
+5V
+5V output
47
+5V
+5V output
22
GND
Ground
48
GND
Ground
23
DIO0
DIO channel 0
49
DIO7
DIO channel 7
24
DIO1
DIO channel 1
50
DIO6
DIO channel 6
25
DIO2
DIO channel 2
51
DIO5
DIO channel 5
26
DIO3
DIO channel 3
52
DIO4
DIO channel 4
Signal connector
Table 13. Signal connector specifications
Table 14. Screw terminal pinout
19
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-TC
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
April, 2005. Test records are outlined in Chomerics Test Report #EMI4193.05. Further testing was conducted
by Chomerics Test Services, Woburn, MA. 01801, USA in December, 2008. Test records are outlined in
Chomerics Test Report #EMI5215B.08.
We hereby declare that the equipment specified conforms to the above Directives and Standards.
Carl Haapaoja, Director of Quality Assurance
Measurement Computing Corporation
10 Commerce Way
Suite 1008
Norton, Massachusetts 02766
(508) 946-5100
Fax: (508) 946-9500
E-mail: info@mccdaq.com
www.mccdaq.com
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