Measurement Computing TC-32 User Manual

TC-32

User's Guide

Document Revision 2

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32-Channel Thermocouple Input USB/Ethernet DAQ Device

November 2015
© Copyright 2015

HM TC-32.docx

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2

Table of Contents

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Preface

About this User's Guide ....................................................................................................................... 5

What you will lear n from this user's guide ......................................................................................................... 5

Conventio ns in this user's guide ......................................................................................................................... 5

Where to find more information ......................................................................................................................... 5

Chapter 1

Introducing the TC-32 ........................................................................................................................... 6

Ethernet interface ................................................................................................................................................ 6

USB interface ..................................................................................................................................................... 6

Functional block diagram ................................................................................................................................... 7

Chapter 2

Installing the TC-32 ............................................................................................................................... 8

Unpacking........................................................................................................................................................... 8

Installing the software ........................................................................................................................................ 8

Connecting the external power adapter .............................................................................................................. 8

Installing the hardwar e ....................................................................................................................................... 8

Installing on USB.............................................................................................................................................................. 8

Installing on Ethernet ........................................................................................................................................................ 8

IP address settings ............................................................................................................................................................. 9

Setting up the TC-32 for communication across networks ................................................................................. 9

Calibrating the hardware................................................................................................................................... 10

Factory calibration ...........................................................................................................................................................10

Field calibration ...............................................................................................................................................................10

Updating firmware ............................................................................................................................................ 10

Restoring factory default network settings ....................................................................................................... 10

Chapter 3

Functional Details ............................................................................................................................... 11

External components ........................................................................................................................................ 11

USB connector .................................................................................................................................................................11

Ethernet connector ...........................................................................................................................................................11

External power connector ................................................................................................................................................11

TC input connectors, measurements, and LED ................................................................................................................11

Digital I/O ........................................................................................................................................................................13

LED indicators .................................................................................................................................................................14

EXPANSION connector ..................................................................................................................................................15

Chassis ground connector ................................................................................................................................................15

RESET button ..................................................................................................................................................................15

Mechanical drawings ........................................................................................................................................ 16

Chapter 4

Specifications ...................................................................................................................................... 18

Thermocouple input .......................................................................................................................................... 18

Channel configuration ...................................................................................................................................... 19

Compatible thermocouple sensors .................................................................................................................... 19

Accuracy ........................................................................................................................................................... 19

Thermocouple measurement accuracy .............................................................................................................................19

Digital input/output........................................................................................................................................... 20

Temperature alarms .......................................................................................................................................... 21

Memory ............................................................................................................................................................ 21

3

TC-32 User's Guide

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Microcontroller ................................................................................................................................................. 21

Power ................................................................................................................................................................ 21

USB .................................................................................................................................................................. 22

Network ............................................................................................................................................................ 22

Ethernet connection .........................................................................................................................................................22

Network interface ............................................................................................................................................................22

Network factory default settings ......................................................................................................................................23

Network security ..............................................................................................................................................................23

LED displays and the factor y reset button ........................................................................................................ 23

Environment ..................................................................................................................................................... 23

Mechanical ....................................................................................................................................................... 23

Signal I/O connectors ....................................................................................................................................... 24

Declaration of Conformity .................................................................................................................. 26

4

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About this User's Guide

What you will learn from this user's guide

This user's guide describes the Mea s urement Co mputing TC-32 data acquisition device and lists device
specifications.

Conventions in this user's guide

For more information

Text presented in a box signifies ad ditional 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.

Preface

Where to find more informati on

Additional information about TC-32 hardware is available on our website at www.mccdaq.com. You can also
contact Measurement Computing Corporation with specific questions.

 Knowledgebase:
 Tech support form:
 Email:
 Phone: [phone] and follow the instructions for reaching Tech Support

For international customers, co ntact your local distributor. Refer to the I nter national Distributors section on our
website at

[e-mail]

www.mccdaq.com/International.

kb.mccdaq.com

www.mccdaq.com/support/support_form.aspx

5

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Introducing the TC-32

The TC-32 is a dual-interface data acquisition device that provide s the following features:

Chapter 1

 32 differential thermocouple (TC) inputs, expandable to 64 channels with

TC-32-EXP expansion d evice

 Two 24-bit ADCs (one ADC per 16 input s )
 TC channels field-to-host isolation
 3 S/s per update rate
 Support for type J, K, R, S, T, N, E, and B thermocouples, software-selectable per channel
 One integrated cold j unction compe ns ation (CJC) sensor p er TC input
 Open thermocouple detection (OTD) to detect faulty TC connections
 8 digital inputs, isolated from TC and host
 32 digital outputs/alarms isolated from TC inputs and host
 DIO connections are made to 50-pin header connector
 USB 2.0 or 10/100 Ethernet interf ac e
 Powered by the included +5 V external power adapter (PS-5V2AEPS)

1

Ethernet interface

The TC-32 has a built-in 10/100 BASE-T auto-negotiati on, hig h -speed communication port.
With the Ethernet interface, you can remotely access and configure your TC-32 from anywhere on the network.

Only one computer can co ntrol the TC-32 at a time.
A unique media access control (MAC) address is assigned to each device at the factory. You configure the

Ethernet connection settings through software. The networ k name uses the format

xxxxxx are the lower six digits of the factory-assigned MAC address.

TC-32-xxxxxx, where

USB interface

The TC-32 is a USB 2.0 full-speed device that is compatible with USB 3.0 ports. The device is also compatible
with USB 1.1 ports.

1

40-pin ribbon cable for the EXPANSION connector is included with the TC-32-EXP.

6

TC-32 User's Guide Introducing the TC-32

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Functional block diagram

Device functions are illustrated in the block di agram shown here:

Figure 1. TC-32 functional block diagram

7

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Chapter 2

Installing the TC-32

Unpacking

As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the board 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.

Installing the software

Refer to the MCC DAQ Software Quick Start for instructions on installing the software on the MCC DAQ CD.
Refer to the d evice product page on the Measurement Computing website for information about the included
and optional software supported by the TC-32.

Install the software before you install your device

The drive r needed to run the TC-32 is installed with the software. Therefore, you need to install the software
package you plan to use before you install the hardware.

Connecting the external pow e r a dapter

Power to the TC-32 is provided with the 5 V external power adapter (PS-5V2AEPS). Connect the adapter cord
to the power connector on the TC-32 device, and plug the AC adapter into an electrical outlet.

Power LED turns on when 5 V power is supplied to the TC-32. If the voltage supply is less than 4.0 V or

The
more than 5.75 V, the

Refer to Figure 2 on page 11 for the location of the Power LED.

POWER LED does not turn on.

Installing the hardware

Installing on USB

Connect the TC-32 using the cable provided to a to a USB port on a c omputer running Windows. Windows
finds and i nstalls the device driver automatically, and notifies you that the device is ready to use.

Installing on Ethernet

The TC-32 requires a TCP/IP and UDP connection to a network or computer. Use the standard Ethernet cable
provided to connect the TC-32 to a 10Base-T or 100Base-TX compatible Ethernet port, hub, or switch.

When connec ting the TC-32 for the first time, make sure that you connect to a local network with DHCP
enabled.

If you are unsure whether you have access to a local network or that DHCP is enabled on that network, you
should use a direct connection to a Windows PC.

It may take a minute or two to detect the device and assign the address. The green
lower left of the Etherne t connecto r turns on whe n there is a valid Ethernet link, and blinks when network
activity is detected.

Link/activity LED on the

Once the TC-32 is physically connected to the local network or PC, you can run the software (InstaCal for
example) to establish a connection. If a connection cannot be established, make sure the device is using the
default configuration by following the instructions in the

Once a connection is established and you can communicate to the device, you can change the configuration for
other netwo rk scenarios.

Restoring factory default network settings on page 10.

8

TC-32 User's Guide Installing the TC-32

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Configuring network settings

The following TC-32 network settings are software-selectable. Only one user at a time can connect to the TC-32
to configure network options on the device. For typical local networks, the default settings are recommended.

Address mode settings

The address mode setting determines whether the default IP parameters (IPv4 address, subnet mask, and
gateway) are assigned to the TC-32 or an auto-addressing method is used to assign these parameters.

DHCP or link-local enabled (default)

If connected to a network with a DHCP server, the service automatically assigns IP addresses to the TC-32.
If the connected network does not have a DHCP server, the address stored in the default IP address is assigned

to the TC-32.
If the TC-32 is directly connected to a Windows PC or other host that supports link-local addressing, a link-

local address is assigned to the device. A link-local address is valid only for communications between the
TC-32 and the device to which it is connected

DHCP Only

Enables configuration by a DHCP server if one is available. The TC-32 is assigned a n IP address shortly after it
is powered up and attached to the network.

Link Local Only

The TC-32 is assigned a link-lo cal IP address by the Windows PC or other host that supports link-local
addressing. A link-local ad dress is valid only for communications bet ween the TC-32 and the device to which it
is connected.

Static

The default

IPv4 Address is manually configured on the TC-32.

IP address settings

The default settings of the following IP address are assigned to the TC-32 when auto matic addressing is
disabled or not available (DHCP or Link Local for example)

IPv4 address – The IP address that is stored on the device. The default IPv4 address is 192.168.0.101.



Subnet mask – The Subnet mask that is stor ed on the TC-32 . The subnet mask determines the nu mber of



bits of the IP address that is used for the host portion of the address vs. the number of bits used for the
network portion. The default subnet mask is 255.255.255.000

Gateway – The gateway IP address that is stored on t he TC-32. The gateway address of the device that



bridges subnets within a network. The default gateway is 192.168.0.1

Connection code

The connection code is a number between 0 (default) and 999999999. You can change thi s number from its
default of 0 to prevent other users from connecting to and configuring the device. The de vi ce remains visible to
other users on the network, but connec tion by another user is not allowed.

Setting up the TC-32 for communication across networks

In order to communicate with the TC-32 from a computer connected to a different network – such as over the
Internet – you must change the network configuration of the network router.

In the following procedure, the TC-32 is installed on the host LAN, the computer is installed on the client LAN,
and it is assumed that you have you have successfully connected the device to a local network.

Caution! This procedure should only be performed by a network administrator or computer professional.

Incorrect settings can significant ly disrupt a ne twork.

9

TC-32 User's Guide Installing the TC-32

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1. Determine the IP address of the device. If the address was assigned by DHCP, it is recommended you

change it to a static address by setting the default address to the address assigned and setting the device
network configuration to static.

2. Configure the firewall/router to forward incoming traffic to the following ports to the IP address assigned

to the device:

o UDP:54211 (discovery)
o TCP:54211 (commands)

3. On the computer connected to the client LAN, manually enter the WAN address of the host router, and

specify the ports that were forwarded to connect to the remote TC-32.

Calibrating the hardware

Factory calibration

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.

Field calibration

The TC-32 supports field calibration. Calibrate the device using InstaCal whenever the ambient temperature
changes by more than ±10 °C fro m the last calibration.

The following items are required to perform field calibration on a TC-32:

 a precision voltage source
 a voltmeter

Each AD C (two ADCs per device) is measured at three points and a linear correction is calculated.
When prompted, enter the voltmeter reading to a precision of three decimal places.
MCC strongly recommends that you warm up the TC-32 for at least 20 minutes prior to performing field

calibration.

Updating firmware

Your DAQ device contains firmware that can be updated in the field if required. Firmware is available for
download at
if an update to your device firmware is available.

www.mccdaq.com/firmware.aspx. MCC recommends that you check this page periodically to see

Restoring factory default network settings

To reset the network configuration settings to the factory default values, complete the following steps:

1. Use a ballpoint pen to press and hold in the Reset button for at least four seconds until both the Power and

Activity LEDs blink , indicating that the settings have been restored to the factory defaults.

2. Release the button so the device continues startup with the default settings. If the button is released before

the two LEDs blink, the settings are not affected and the device starts up normally.

If InstaCal is open when default settings are restored, click the
to reflect the changes.

Refresh Boards button on the InstaCal toolb a r

10

1

TC input channels 0 through 31 (32 mini-jack connectors)

4

ALARM LED

2

POWER LED

5

OPEN TC LED

3

ACTIVITY

1

RESET

6

Chassis ground connector

2

USB connector

7

40-pin EXPANSION connector

ETHERNET

DIN

4

External power (EXT DC) connector

9

32 digital output (DOUT) pull-up switches

5

PWR

10

DIGITAL I/O

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Functional Det ails

External components

TC-32 front panel components are shown in Figure 2.

LED

Figure 2. TC-32 front panel components

TC-32 rear panel components are shown in Figure 3.

Chapter 3

Factory

3

Power switch (

button

connector 8 Eight digital input (

)

Figure 3. TC-32 rear panel components

50-pin

) pull-up switches

connector

USB connector

The USB connector provides USB communication.

Ethernet connector

The E-1608 has one 10/100 BASE-T, auto-negotiation, high-speed communication port. The port connector is
an RJ-45, eight-position connector. The Ethernet port accepts CAT-5 shielded or unshielded twisted pair cable.
The maximum communication distanc e without using a repeat er is 100 meters.

External power connector

Connect the PS-5V2AEPS power supply to this connector. The power supply provides 5 VDC, 2 A power t o the
TC-32.

TC input connectors, measurements, and LED

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.

11

TC-32 User's Guide Functional Details

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You can add another 32 differential TC input connections to mini-jack connectors labeled CH0 through CH31
(refer to Figure 2).

The device supports type J, K, S, R, B, E, T, N thermocouples.
Caution! MCC strongly recommends that you ground yourself u sing a wrist strap before handling the

thermocouple sensors.

Connecting TCs to common-mode voltage sources

You can connect a thermocouple to a common voltage source (AC or DC) as long as the magni tude of the
voltage is within the co mmon mode voltage range specification of 48V (DC) or 3.5V p-p (AC).

Each applied common mode voltage must be less than or equal to the average common mode voltage ±1.4 V.
For example, in Figure 4, ther e ar e three TCs connected to three different common mode voltage sources and

two thermocouples that are not connected to anything (floating).
In this example, the average common mode voltage is calculated as follows: (11.4 V+ 10 V + 8.6 V)/3 = 10 V

 Each TC channel becomes biased to the average common mode voltage of 10 V.
 Each commo n mode voltage must then be within the 10 V ±1.4 V limits or 8.6 V to 11.4 V.

Figure 4. TC-32 common mode voltage connections example

Cold junction compensation (CJC)

Each TC input on the TC-32 has a high-resolution CJC sensor. When you connect the thermocouple sensor
leads to the sensor input channel, the d issimilar metals at the TC-32 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 CJC technique.

The measured voltage includes both the thermocouple volta ge and the cold junction volt age. To compensate for
the additional cold junction voltage, the TC-32 subtracts the cold junction voltage from the thermocouple
voltage.

Increasing the thermocouple length

If you need to increase the length of your thermocouple, use the same type of TC wires to minimize the error
introduced by thermal EMFs.

12

TC-32 User's Guide Functional Details

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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 t hen output as a 32-bit floating point value in the configured format (vo l tage or
temperature).

Open-thermocouple detection (OTD)

The TC-32 is equipped with OTD for all analog input channel. Wi th OTD, any op en-circuit condition at the TC
sensor is detected b y the software. An open channel is detected by the use of a pull up a nd pull down resistors
on the thermocouple inp uts. An open thermocouple co nd ition forces the input differential volta ge outside of the
valid thermocouple voltage ra nge. The software r eco gnizes 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 OTD e nabled, 75 nA (max) of input leakage current is injected into the TC. This current can cause an
error voltage to develop across the lead resistance of the TC that is indistinguishable from the thermocouple
voltage you a re measuring. You can est imate this error voltage with the following formula:

error voltage = resistance of the thermocouple × 75 nA

To reduce the error, reduce the length of the TC to lower its resistance, or lower the AWG of the wire by using
a wire with a larger diameter. With open-thermocouple detection disabled, 2 nA (max) of input leakage current
is injected into the TC.

Digital I/O

The TC-32 provides up to eight digital inputs and 32 digital outputs that are electrically isolated from the host
computer and from the TC-32 analog circuits.

All DIO bits have internal pull-up resistors to 5 V that can be disconnected with the rear panel slide switches.
The reco mmended maximum length of the 50-pin cable used to connect the

digital I/O signal source is 1 foot.

Digital inputs

The TC-32 provides \ digital inputs with rates of 500 port reads or single bit reads per second.
Digital input voltage ranges of 0 V to 15 V are permitted, with thresholds of 0.6 V (low) and 2.2 V (high).
Each digital input has a 100 kΩ pull-up resistor. Use the eight

PULL-UP ENABLE – DIN slide switches to

enable or disable the 5 V pull-up option.

Digital outputs/temperature alarms

Each digital output is open-drain, which can of sink up to 100 mA for direct drive applications.
Each digital input has a 100 kΩ pull-up resistor. Use the eight

PULL-UP ENABLE – DOUT slide switches to

enable or disable the 5 V pull-up option.
Optionally, you can configure e a c h d igital output as an alarm for each TC input. When an alarm is enabled, its

associated output line is driven to the appropriate state determined by the alarm options and input temperature.
You can also use the alarm outputs to control a device or application that indicate s when a temperature

threshold has been exceeded.

DIGITAL I/O connector to the

The alarm configurations are stored in non-volatile memory and loaded at power up.
Alarm settings are applied when changed and at power on. Temperatures are constantly converted on enabled

channels and processed for alarm conditions regardless of the communications connectivity.

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TC-32 User's Guide Functional Details

Trigger alarm when input temperature ≥ T1; reset alarm when

Trigger alarm when inp ut temperature is < T1 or > T2

Alarm on temperature reading only

Alarm disabled; digital output line can be used for normal

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Each available alarm mode and setting is explained below.

Alarm input modes

Set independent temperat ure thresholds T1 and T2
for each alarm.

Alarm error modes



input temperature < T2

 Trigger alarm when input temperature ≤ T1; reset alarm when

input temperature > T2




 Alarm on temperature reading, open thermocouple, or common-

mode voltage error

 Alarm on open thermocouple or common-mode voltage error only

Alarm output modes



operation

 Alarm enabled; active low output (output line goes low when

alarm condition is met)

 Alarm enabled; active high output (output line goes high when

alarm condition is met)

 Alarm output may be latched and will not clear unless explicitly

cleared by the user

The TC-32 provides three alarm indicators –the ALARM LED, the OPEN TC LED o n t he front panel and,
optionally, the user-configurable digital outputs associated with each channel.

Because the digital alarm outputs are user-configurable, they can be used to supply additional information
(visually, if the digital outputs are used to drive LEDs), such as the channel associated with the alarm condition
or differentiating between threshold and CMV alarms.

Pull-up configuration

By default, pull-up is enabled for all e ight digital inputs and all 32 digital output s. Slide switches on the rear of
the housin g can disable p ull-up for each digital input bit and digital output bit.

LED indicators

The TC-32 has four LEDs that indicate the power, communication, alarm, and open TC status

POWER LED

The POWER LED turns on when you plug the power adapter into the TC-32. If a Flash LED command is sent
from an application, the

ACTIVITY LED

The ACTIVITY LED turns on when there is a valid connection (USB or Ethernet) and blinks when a command is
sent to the TC-32.

ALARM LED

ALARM LE D turns on wh en an alarm condition occurs.

The

OPEN TC LED

The OPEN TC LED turns on when there is an open thermocouple condition.

2

Power LED blinks five times.

2

2

Both the POWER and ACTIVITY LEDs blink in firmware upgrade mode. Refer to Updating firmware on page 10.

14

TC-32 User's Guide Functional Details

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EXPANSION connector

Use the EXPANSION connector to connect the TC-32 to a TC-32-EXP expansion device (sold separately) for
applications that need additional analog/thermocouple input and digital I/O channels. A 40-pin expansion cable
is included with the TC-EXP-32.

Refer to

www.mccdaq.com for TC-32-EXP product details.

Chassis ground connector

Provides a connection point (#6-32 screw) for chassis ground. C onnect this to a n external grounding source.
If the TC-32 is connected by USB or by a shielded Ethernet cable to grounded equipment, connecting to an

external grounding source is not needed since the USB/shielded Ethernet connection already grounds the TC-32
and a connected TC-32-EXP.

RESET button

Press and hold this button to restore the TC-32 to its factory default network settings. Refer to Restoring factory

default netwo rk se tt i ng s on page 10

15

TC-32 User's Guide Functional Details

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Mechanical drawings

Figure 5. Enclosure dimensions - front

16

Figure 6. Enclosure dimensions - rear

TC-32 User's Guide Functional Details

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Figure 7. Enclosure dimensions – side

Figure 8. Circuit board dimensions

17

A/D resolution

24-bit

Number of channels

32

50 Hz or 60 Hz noise filtering, software-

Between any TCx channel and chassis

Software-selectable t o match thermocouple
Differential input voltage range

±78.125 mV

Absolute maximum input

±25 V (power on)
±25 V (power off)

50 Hz filtering, power on

26 MΩ

60 Hz filtering, power on

20 MΩ

Open thermocouple detect disabled

2 nA

Open thermocouple detect enabled

75 nA

50 Hz filtering, at DC and fin=50 Hz

110 dB

60 Hz filtering at DC and fin=60 Hz

110 dB

50 Hz filtering at fin =50 Hz

80 dB typ.

60 Hz filtering at fin =60 Hz

80 dB typ.

50 Hz filtering

22 Hz

60 Hz filtering

26 Hz

Crosstalk

Between any two TCx inputs

-90 dB

Sample rate (Note 1)

3 Hz max (per channel)

TCx channel to TCx channel

±1.40 V

TCx channel relative to chassis
ground, fin = 60 Hz

TCx channel relative to chassis ground

±48 V DC

Input noise

50 Hz or 60 Hz filtering

510 nV rms

Gain error

50 Hz or 60 Hz filtering

0.004 % FSR

Offset error

50 Hz or 60 Hz filtering

3 µV

Thermocouple type J,K,T,E,N

0.07 °C

Thermocouple type R,S

0.18 °C

Thermocouple type B

0.60 °C

Warm-up time

20 minutes min

Open thermocouple d etect

±0.20 °C typ

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Specifications

All specifications are subject to change without notice.
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.

Thermocouple input

Table 1. Generic analog input specifications

Parameter Condition Specification

A/D converter type Delta-Sigma

Chapter 4

Filtering options

Isolation

Channel configuration

voltage
Differential input impedance

Input current

Common mode rejection

Noise rejection

Input bandwidth

Common mode voltage range
(Note 2)

ground.

Between any two TCx inputs

selectable
500 VDC absolute max

sensor type

±3.5 VAC p-p

Measurement sensitivity
(Note 3)

response time

CJC sensor accuracy 0 °C to 45 °C

Note 1: The enabled thermocouple inputs are continuously converted at the maximum A/D converter rate.

1 second

±0.40 °C max

18

TC-32 User's Guide Specifications

Thermocouple

J, K, S, R, B, E, T, N

32 differentia l cha nne ls

J: –210 °C to 1200 °C

K: –270 °C to 1372 °C

R: –50 °C to 1768 °C

T: –270 °C to 400 °C

N: –270 °C to 1300 °C

E: –270 °C to 1000 °C

B: 0 °C to 1820 °C

Sensor

Sensor

Accuracy Error

15°C to 35°C

Accuracy Error

15°C to 35°C

Accuracy Error

0°C to 45°C

Accuracy Error

0°C to 45°C

–210

1.965

0.910

2.167

0.989

0

0.787

0.361

0.816

0.375

1200

0.752

0.371

1.148

0.508

–210

2.295

1.061

2.520

1.152

0

0.821

0.376

0.852

0.392

1372

1.029

0.504

1.560

0.688

–50

2.467

1.111

2.655

1.223

250

1.835

0.825

1.961

0.904

–50

2.609

1.174

2.810

1.293

250

1.862

0.837

1.992

0.918

1768

0.754

0.305

1.346

0.520

250

2.450

1.090

2.707

1.254

700

0.937

0.424

1.136

0.520

1820

0.610

0.300

1.056

0.467

–200

1.754

0.811

1.933

0.880

0

0.775

0.355

0.806

0.369

1000

0.657

0.323

0.989

0.437

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Note 2: When thermocouple sensors are connected to different common mode voltages, the channels with

floating thermocouples sensors will be biased to approximately the average value of the applied
common mode voltages. Each of the applied common mode voltages must then be less than or equal to
the average common mode voltage ±1.40 V or [CMV

applied

≤ (CMV

Note 3: Measurement sensitivity is the smallest change in temperature that can be detected.

average

±1.4 V)].

Channel configuration

Table 2. Channel configuration specification

Sensor Category Condition Specification

Note 4: Channel configuration is stored on EEPROM external to the isolated microcontroller by the firmware

whenever any item is modified. Modification is performed by commands issued from an external
application, and the configuration is made non-volatile through the use of the EEPROM.

Compatible thermocouple s e ns ors

Table 3. Compatible sensor type specifications

Parameter Specification

Thermocouple

S: –50 °C to 1768 °C

Accuracy

Thermocouple measurement accuracy

Table 4. Thermocouple accuracy specifications, including CJC measurement error. All specifications are (±).

Type

J

K

S

R

Temperature
(°C)

1768 0.893 0.361 1.519 0.590

Maximum (°C),

Typical (°C),

Maximum (°C),

Typical (°C),

B

E

19

TC-32 User's Guide Specifications

Sensor

Sensor

Accuracy Error

15°C to 35°C

Accuracy Error

15°C to 35°C

Accuracy Error

0°C to 45°C

Accuracy Error

0°C to 45°C

–200

2.005

0.923

2.207

1.005

0

0.836

0.382

0.874

0.400

400

0.544

0.255

0.659

0.297

–200

2.255

1.038

2.481

1.134

1300

0.718

0.357

1.157

0.510

Number of inputs

8 channels

Configuration

Fixed input

Input volt a ge range

0 V to +15 V

Input type

CMOS (Schmitt trigger)

Input characteristics

100 kΩ pull-up resistor, 28.7 kΩ series resistor

Maximum input voltage range

0 V to +20 V max (power on/ of f, relative to IGND pins)

Pull-up configuration

All pins pulled up to +5 V via individual 100 kΩ resistors using slide switch SW5.
Transfer rate (software paced)

500 port reads per second typ.

Input high voltage

1.3 V min, 2.2 V max

Input low voltage

1.5 V max, 0.6 V min

Schmitt trigger hysteresis

0.4 V min, 1.2 V max

Number of outputs

32 channels, shared with alarms

Configuration

Open drain output

Output characteristics

100 kΩ pull-up, open drain (DMOS transistor)

Pull-up configuration

All pins pulled up to +5 V via individual 100 kΩ resistors using slide switches
Transfer rate (software-paced)

Digital output – 500 port writes per second typ.

Output voltage range

0 V to +5 V (internal 100 kΩ pull-up resistors connected to +5 V by default)
Off state leakage current

0.1 µA

Sink current capability

100 mA max (contin uous) per output pin

DMOS transistor on-resistance

4 Ω

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Type

T

N

Temperature
(°C)

0 0.908 0.415 0.949 0.437

Maximum (°C),

Typical (°C),

Maximum (°C),

Typical (°C),

Thermocouple measurement accuracy specifications include polynomial linearization, cold-junction
compensation, and system noise. The accuracy specifications assume the device is operated within its enclosure
and with the e nclosure in a horizontal, upright orientation. The board should also be warmed up for the
recommended 20 minutes. If the maximum digital output load of 3.2 amps is applied, add an additional 0.30°C
to the typical and maximum accuracy specifications listed above. Errors shown do not include inherent
thermocouple error. Contact your thermocouple supplier for details on the actual thermocouple accuracy error.

Digital input/output

Table 5. Digital input specifications

Parameter Specification

SW5 default positions are on (pulled up.)

Table 6. Digital output specifications

Parameter Specification

SW1-SW4. The default positions for SW1-4 are on (pulled up.)

0 V to +15 V max (using external pull up resistor)

(drain to source)

Note 5: Ground pins labeled IGND are isolated from AGND and chassis ground.

20

TC-32 User's Guide Specifications

Number of alarms

32, shared with digital output

Each alarm controls it s as s ociated digital output lin e as an alarm output. When an

Alarm when input temperature >= T1, reset alarm when input temperature < T2

Note: T1 and T2 may be independently set for each alarm.

Alarm on temperature reading only

Alarm on open thermocouple or c om mon-mode voltage error only

Disabled, digital output line may be used for normal operation

user

Alarm latency (Note 6)

1 second, max

EEPROM

8,192 bytes

One high-performance 32-bit RISC microcontroller (communications)

330 mA typ, 610 mA max

TC-32-EXP connected)

+5 VDC ± 5%
(+5 VDC power supply provided)

Power switch

Rocker type

External power supply (included)

MCC p/n PS-5V2AEPS

+5 VDC, 10 W, 5% regulation

4.0 V > V

ext

> 5.75 V

PWR LED = Off (power fault)

ext

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Temperature alarms

Table 7. Temperature alarm specifications

Parameter Specification

Alarm functionality

alarm is enabled, it s as sociated output line is dri ven to the appropriate state
determined by the alarm options and input temperature. The alarm configurations
are stored in non-volatile memory and loaded at power on.



Alarm input modes

Alarm error modes

Alarm output modes

 Alarm when input temperature <= T1, reset alarm when input temperature > T2
 Alarm when input temperature is < T1 or > T2


 Alarm on temperature reading, open thermocouple, or common-mode voltage

error




 Enabled, active high output (output line goes high when alarm condition is met)
 Enabled, active low output (output line goes low when alarm condition is met)
 Alarm output may be latched and will not clear unless explicitly cleared by the

Note 6: Alarm settings are applied when changed and at power-on. Temperatures are constantly converted on

enabled channels and processed for alarm conditions regardless of the communications connectivity.

Memory

Table 8. Memory specifications

Parameter Specification

Microcontroller

Table 9. Microcontroller specifications

Parameter Specification

Type

One high-performance 32-bit RISC microcontroll er (measurement)

Power

Table 10. Power specifications

Parameter Conditions Specification

Supply current

External power input (Note 5)

External power input voltage
supervisor limits

4.0 V < V

< 5.75 V PWR LED = On

21

550 mA typ, 1000 mA max (with

TC-32 User's Guide Specifications

Chassis ground connection

6-32 screw on rear of enclosure

Device type

USB 2.0 full speed

Device compatibility

USB 1.1, USB 2.0, USB 3.0

Cable length

5 meters max

Power

Self-powered (no USB current consumed)

100 Base-TX
Communication rates

10/100 Mbps, auto-negotiated

Connector

RJ-45, 8 position

Cable length

100 meters max

Additional parameters

HP Auto-MDIX support

Protocols used

TCP/IP (IPv4 only), UDP

UDP:54211 (discovery)
Network IP configuration

DHCP + link-local, DHCP, static, link-local

TC-32-xxxxxx, where xxxxxx are the lower 6 digits of the device MAC
address

By NBNS (responds to b-node broadcasts, therefore only available on the local
subnet)

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Parameter Conditions Specification

Note 7: Voltage specification applies at barrel plug power input. The power supply provided with the device

meets this specification at the rated total power supply current. If a different power supply is used,
small line resistances could cause significant voltage drop between the power supply and the barrel
plug input.

USB

Table 11. USB specifications

Parameter Specification

Connector Standard B

Network

Ethernet connection

Table 12. Ethernet connection specifi cations

Parameter Specification

Ethernet type

10 Base-T

Network interface

Table 13. Factory default specific atio ns

Parameter Specification

Network ports used

Network name

Network name publication

TCP:54211 (commands)

22

TC-32 User's Guide Specifications

Factory default IP address

192.168.0.101

Factory default subnet mask

255.255.255.0

Factory default gateway

192.168.0.1

Factory default DHCP setting

DHCP + link-local enabled

TCP sockets are n ot opened unless application s ends the correct PIN code (stored
Number of concurrent sessions

1

Vulnerabilities

TCP Sequence Number Approximation Vulnerability

Indicates power on. Blinks when blink command is sent. Both the POWER and
ACTIVITY LEDs blink in firmware upgrade mode.

On when there is a valid connection and blinks when a command is sent to the
TC-32. Both the POWER and ACTIVITY LEDs blink in firmware upgrade mode.

ALARM

Indicates that an alarm condition is met.

OPEN TC LED (bottom)

Indicates that there is an open thermocouple condition.

When held for 3 seconds, the LEDs turn off for a short time, indicating a reset is in

Operating temperature range

0 °C to 45 °C

Storage temperature range

–40 °C to 85 °C

Dimensions (L × W × H)

482.6 × 128.6 × 43.18 mm (19 × 6.15 × 1.74 in.)

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Network factory default settings

Table 14. Factory default specific atio ns

Parameter Specification

Network security

Table 15. Factory default specific atio ns

Parameter Specification

Security implementation

in non-volatile memory, may be changed by user, default value 0000)

LED displays and the factory reset button

Table 16. LED and button configurations

Parameter Specification
POWER LED (top)

ACTIVITY LED

LED

Factory reset button

process. When the LEDs turn back on, reset is complete and the factory-default
network settings are restored.

Environment

Table 17. Environmental speci ficat ion s

Parameter Specification

Humidity 0 °C to 90% non-condensing

Mechanical

Table 18. Mechanical specific ation s

Parameter Specification

23

TC-32 User's Guide Specifications

User accessible I/O connectors
(excluding USB and Ethernet)

Compatible cable for the 50-pin

C50FF-x

Compatible accessory products

CIO-MINI50

Compatible cables for the 40-pin
expansion connector

C40FF-x

Pin

Signal Name

Pin Description

Pin

Signal Name

Pin Description

TC1(-)

CH1 sensor input (–)

TC17(-)

CH17 sensor input (–)

TC4(+)

CH4 sensor input (+)

TC20(+)

CH20 sensor input (+)

TC6(-)

CH6 sensor input (–)

TC22(-)

CH22 sensor input (–)

TC9(+)

CH9 sensor input (+)

TC25(+)

CH25 sensor input (+)

TC11(-)

CH11 sensor input (–)

TC27(-)

CH27 sensor input (–)

TC14(+)

CH14 sensor input (+)

TC30(+)

CH30 sensor input (+)

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Signal I/O connectors

Table 19. Connector specifications

Parameter Specification

Thermocouple inp ut s , digital I/O connector, expansion connector, chassis ground

Thermocouple co nne c tor t ype Thermocouple Mini-Jack (Omega PCC-SMP-V-U-100)
Digital I/O connector type 50-pin IDC header

DIO connector



with the C50FF-x cable
Expansion connector type 40-pin IDC header

Chassis ground connector 6-32 screw

 SCB-50

Table 20. Thermocouple connector pin out

TC0(+) CH0 sensor input (+)

J1

TC0(-) CH0 sensor input (–) TC16(-) CH16 sensor input (–)
TC1(+) CH1 sensor input (+)

J2

TC2(+) CH2 sensor input (+)

J3

TC2(-) CH2 sensor input (–) TC18(-) CH18 sensor input (–)
TC3(+) CH3 sensor input (+)

J4

TC3(-) CH3 sensor input (–) TC19(-) CH19 sensor input (–)

J5

TC4(-) CH4 sensor input (–) TC20(-) CH20 sensor input (–)
TC5(+) CH5 sensor input (+)

J6

TC5(-) CH5 sensor input (–) TC21(-) CH21 sensor input (–)
TC6(+) CH6 sensor input (+)

J7

TC7(+) CH7 sensor input (+)

J8

TC7(-) CH7 sensor input (–) TC23(-) CH23 sensor input (–)
TC8(+) CH8 sensor input (+)

J9

TC8(-) CH8 sensor input (–) TC24(-) CH24 sensor input (–)

J10

TC9(-) CH9 sensor input (–) TC25(-) CH25 sensor input (–)
TC10(+) CH10 sensor input (+)

J11

TC10(-) CH10 sensor input (–) TC26(-) CH26 sensor input (–)
TC11(+) CH11 sensor input (+)

J12

J17

J18

J19

J20

J21

J22

J23

J24

J25

J26

J27

J28

TC16(+) CH16 sensor input (+)

TC17(+) CH17 sensor input (+)

TC18(+) CH18 sensor input (+)

TC19(+) CH19 sensor input (+)

TC21(+) CH21 sensor input (+)

TC22(+) CH22 sensor input (+)

TC23(+) CH23 sensor input (+)

TC24(+) CH24 sensor input (+)

TC26(+) CH26 sensor input (+)

TC27(+) CH27 sensor input (+)

TC12(+) CH12 sensor input (+)

J13

TC12(-) CH12 sensor input (–) TC28(-) CH28 sensor input (–)
TC13(+) CH13 sensor input (+)

J14

TC13(-) CH13 sensor input (–) TC29(-) CH29 sensor input (–)

J15

TC14(-) CH14 sensor input (–) TC30(-) CH30 sensor input (–)
TC15(+) CH15 sensor input (+)

J16

TC15(-) CH15 sensor input (–) TC31(-) CH31 sensor input (–)

J29

J30

J31

J32

TC28(+) CH28 sensor input (+)

TC29(+) CH29 sensor input (+)

TC31(+) CH31 sensor input (+)

24

TC-32 User's Guide Specifications

Pin

Signal Name

Pin Description

Pin

Signal Name

Pin Description

1

DOUT0

Digital Output 0/ Alarm Output 0

2

DOUT1

Digital Output 1/ Alarm Output 1

3

DOUT2

Digital Output 2/ Alarm Output 2

4

DOUT3

Digital Output 3/ Alarm Output 3

7

DOUT6

Digital Output 6/ Alarm Output 6

8

DOUT7

Digital Output 7/ Alarm Output 7

9

DOUT8

Digital Output 8/ Alarm Output 8

10

DOUT9

Digital Output 9/ Alarm Output 9

11

DOUT10

Digital Output 10/ Alarm Output 10

12

DOUT11

Digital Output 11/ Alarm Output 11

13

DOUT12

Digital Output 12/ Alarm Output 12

14

DOUT13

Digital Output 13/ Alarm Output 13

17

IGND

Isolated Digital GND

18

IGND

Isolated Digital GND

19

IGND

Isolated Digital GND

20

IGND

Isolated Digital GND

21

DOUT16

Digital Output 16/ Alarm Output 16

22

DOUT17

Digital Output 17 / Alarm Output 17

23

DOUT18

Digital Output 18/ Alarm Output 18

24

DOUT19

Digital Output 19/ Alarm Output 19

27

DOUT22

Digital Output 22/ Alarm Output 22

28

DOUT23

Digital Output 23/ Alarm Output 23

29

DOUT24

Digital Output 24/ Alarm Output 24

30

DOUT25

Digital Output 25 / Alarm Output 25

31

DOUT26

Digital Output 26/ Alarm Output 26

32

DOUT27

Digital Output 27/ Alarm Output 27

33

DOUT28

Digital Output 28/ Alarm Output 28

34

DOUT29

Digital Output 29/ Alarm Output 29

37

IGND

Isolated Digital GND

38

IGND

Isolated Digital GND

39

IGND

Isolated Digital GND

40

IGND

Isolated Digital GND

41

DIN0

Digital Input 0

42

DIN1

Digital Input 1

43

DIN2

Digital Input 2

44

DIN3

Digital Input 3

47

DIN6

Digital Input 6

48

DIN7

Digital Input 7

49

IGND

Isolated Digital GND

50

IGND

Isolated Digital GND

Pin

Signal Name

Pin Description

Pin

Signal Name

Pin Description

1

+12VA (Note)

+12 VA power output

2

AGND

Isolated Analog GND

3

+12VA

+12 VA power output

4

AGND

Isolated Analog GND

5

+5VA

+5 VA power output

6

AGND

Isolated Analog GND

9

+5VA

+5 VA power output

10

AGND

Isolated Analog GND

13

+3.3VA

+3.3 VA power output

14

AGND

Isolated Analog GND

17

+3.3VA

+3.3 VA power output

18

AGND

Isolated Analog GND

21

CS

Chip select

22

AGND

Isolated Analog GND

23

SCK

Serial clock

24

AGND

Isolated Analog GND

25

MOSI

Master output data

26

AGND

Isolated Analog GND

MISO

AGND

29

IRQ

Interrupt request

30

AGND

Isolated Analog GND

31

RSVD

Reserved

32

AGND

Isolated Analog GND

RSVD

AGND

35

RSVD

Reserved

36

AGND

Isolated Analog GND

37

RSVD

Reserved

38

AGND

Isolated Analog GND

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Table 21. Digital I/O connector (J33) pinout

5 DOUT4 Digital Output 4/ Alarm Output 4 6 DOUT5 Digital Output 5/ Alarm Output 5

15 DOUT14 Digital Output 14/ Alarm Output 14 16 DOUT15 Digital Output 15/ Alarm Output 15

25

DOUT20

35 DOUT30 Digital Output 30/ Alarm Output 30 36 DOUT31 Digital Output 31/ Alarm Output 31

45 DIN4 Digital Input 4 46 DIN5 Digital Input 5

Digital Output 20/ Alarm Output 20 26

DOUT21

Digital Output 21/ Alarm Output 21

Table 22. Expansion connecto r (J34) pinout

7 +5VA +5 VA power output 8 AGND Isolated Analog GND

11 +5VA +5 VA power output 12 AGND Isolated Analog GND

15

+3.3VA

+3.3 VA power output 16

Note 8

AGND

Isolated Analog GND

19

27

33

39

+3.3VA

EXP_DETECT

+3.3 VA power output 20

Master input data 28

Reserved 34

EXP detection 40

AGND

AGND

Isolated Analog GND

Isolated Analog GND

Isolated Analog GND

Isolated Analog GND

Note 8: Power supplies (+12 VA, +5 VA, 3.3 VA) located at connector J34 are intended for use with the

TC-32-EXP expansion device only.

25

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Declaration of Conformity

According to ISO/IEC 17050-1:2010

Manufacturer: Measurement Computing Corporation
Address: 10 Commerce Way
Suite 1008
Norton, MA 02766
USA
Product Category: Electrical equipment for measurement, control and laboratory use.
Date and Place of Issue: October 15, 2015, Norton, Massachusetts USA
Test Report Number: EMI6774.15

Measurement Computing Corporation declares under sole responsibility that the product(s)

TC-32

Complies with the essential requirements of the following applica ble European Directives:

Electromagnetic Compatibility ( EMC) Directive 2004/108/EC
Low Voltage Directive 2006/9 5/EC
RoHS Directive 2011/65/EU

Conformity is assessed in accordance to the following standards:
EMC:

Emissions:

 EN 61326-1:2013 (IEC 61326-1:2012), Class A
 EN 55011: 2009 + A1:2010 (IEC CISPR 11:2009 + A1:2010), Group 1, Class A

Immunity:

 EN 61326-1:2013 (IEC 61326-1:2012), Controlled EM Environments
 EN 61000-4-2:2008 (IEC 61000-4-2:2008)
 EN 61000-4-3 :2010 (IEC61000-4-3:2010)
 EN 61000-4-4 :2012 (IEC61000-4-4:2012)
 EN 61000-4-5 :2005 (IEC61000-4-5:2005)
 EN 61000-4-6 :2013 (IEC61000-4-6:2013)
 EN 61000-4-11:2004 (IEC61000-4-11:2004)

Safety:

 EN 61010-1 (IEC 61010-1)

Environmental Affairs:

Articles manufactured on or after the Date of Issue of this Declaration of Conformity do not contain any of the
restricted substances in concentr ations/applications not permitted by the RoHS Directive.

Carl Haapaoja, Director of Quality Assurance

Measurement Computing Corporation

www.mccdaq.com

NI Hungary Kft

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10 Commerce Way
Norton, Massachusetts 02766
[phone]
Fax: [phone]
E-mail:

[e-mail]

H-4031 Debrecen, Hátar út 1/A, Hungary

Phone: [phone]

Fax: [phone]

http://hungary.ni.com/debrecen