TC-32-EXP
32-Channel Thermocouple Input Expansion Device for TC-32

User's Guide

Document Revision 3A
March 2016
© Copyright 2016

Trademark and Copyright Information
Measurement Computing Corporation, InstaCal, Universal Library, and the Measurement Computing logo areeither trademarks or registered trademarks of Measurement Computing Corporation. Refer to the Copyrights &Trademarks section on mccdaq.com/legal for more information about Measurement Computing trademarks.
Other product and company names mentioned herein are trademarks or trade names of their respective
companies.
© 2016 Measurement Computing Corporation. All rights reserved. No part of this publication may be
reproduced, stored in a retrieval system, or transmitted, in any form by any means, electronic, mechanical, by
photocopying, recording, or otherwise without the prior written permission of Measurement Computing
Corporation.
NoticeMeasurement Computing Corporation does not authorize any Measurement Computing Corporation product for
use in life support systems and/or devices without prior written consent from Measurement Computing
Corporation. Life support devices/systems are devices or systems that, a) are intended for surgical implantation
into the body, or b) support or sustain life and whose failure to perform can be reasonably expected to result ininjury. Measurement Computing Corporation products are not designed with the components required, and are
not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis ofpeople.

HM TC-32-EXP.docx

2

Table of Contents
Preface

About this User's Guide ....................................................................................................................... 4
What you will learn from this user's guide ......................................................................................................... 4
Conventions in this user's guide ......................................................................................................................... 4
Where to find more information ......................................................................................................................... 4
Chapter 1

Introducing the TC-32-EXP................................................................................................................... 5
Functional block diagram ................................................................................................................................... 6
Chapter 2

Installing the TC-32-EXP....................................................................................................................... 7
Unpacking........................................................................................................................................................... 7
Installing the software ........................................................................................................................................ 7
Installing the hardware ....................................................................................................................................... 7
Chapter 3

Functional Details ................................................................................................................................. 8External components .......................................................................................................................................... 8
TC input connectors, measurements, and LED ................................................................................................................. 8
Digital I/O ........................................................................................................................................................................10
LED indicators .................................................................................................................................................................12
TC-32 connector ..............................................................................................................................................................13
Chassis ground connector ................................................................................................................................................13

Mechanical drawings ........................................................................................................................................ 14
Chapter 4

Specifications ...................................................................................................................................... 17
Thermocouple input .......................................................................................................................................... 17
Channel configuration ...................................................................................................................................... 18
Compatible thermocouple sensors .................................................................................................................... 18
Accuracy ........................................................................................................................................................... 18
Thermocouple measurement accuracy .............................................................................................................................18

Digital input/output........................................................................................................................................... 19
Temperature alarms .......................................................................................................................................... 20
Memory ............................................................................................................................................................ 20
Microcontroller ................................................................................................................................................. 20
LED displays .................................................................................................................................................... 20
Environment ..................................................................................................................................................... 21
Mechanical ....................................................................................................................................................... 21
Signal I/O connectors ....................................................................................................................................... 21
Declaration of Conformity .................................................................................................................. 24

3

Preface

About this User's Guide
What you will learn from this user's guideThis user's guide describes the Measurement Computing TC-32-EXP 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 TC-32-EXP hardware is available on our website at www.mccdaq.com. You canalso contact Measurement Computing Corporation 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
website at www.mccdaq.com/International.

4Chapter 1

Introducing the TC-32-EXP
The TC-32-EXP is a dual-interface data acquisition device that provides the following features:












Adds 32 differential thermocouple (TC) inputs to TC-32 for a total of 64 TC channels (includes 40-pin
ribbon cable for connecting to TC-32))
Two 24-bit ADCs (one ADC per 16 inputs)
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 junction compensation (CJC) sensor per 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
Powered by host TC-32

5TC-32-EXP User's Guide

Introducing the TC-32-EXP

Functional block diagram
Device functions are illustrated in the block diagram shown here:

Figure 1. TC-32-EXP functional block diagram

6

Chapter 2

Installing the TC-32-EXP
UnpackingAs 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 device product page on the Measurement Computing website for information about the included
and optional software supported by the TC-32-EXP.
Install the software before you install your device
The driver needed to run the TC-32-EXP is installed with the software. Therefore, you need to install thesoftware package you plan to use before you install the hardware.

Installing the hardware
The TC-32-EXP must be connected to a host TC-32 in order to communicate with a computer and receive
power. Refer to the TC-32 User's Guide for instructions on installing, configuring, calibrating, and updating thefirmware on the host TC-32.
Complete the following steps to connect the TC-32-EXP to a host TC-32:
1.

Power off the host TC-32 and connect the TC-32-EXP (connector labeled TC-32) to the TC-32 (connector
labeled EXPANSION) using the 40-pin cable provided.

2.

Connect the chassis ground connector on the rear of the TC-32-EXP (refer to Figure 3 on page 8) to thechassis ground connector on the rear of the TC-32.

Caution! If using both the TC-32 chassis ground screw connection and a USB or shielded Ethernet cable, aground loop could be created if the two grounds are not at the same voltage potential. You should
avoid creating a ground loop situation which could affect measurement accuracy.
3.

Connect the TC-32-EXP to its TC and digital I/O signal sources, and then power on the host TC-32.

7

Chapter 3

Functional Details
External components
TC-32-EXP front panel components are shown in Figure 2.

1

TC input channels 32 through 63 (32 mini-jack connectors)

2

POWER LED
ACTIVITY LED

3

4
5

ALARM LED
OPEN TC LED

Figure 2. TC-32-EXP front panel components

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

1

Chassis ground connector

432 digital output (DOUT) pull-up switches

240-pin TC-32 connector

550-pin DIGITAL I/O connector

3

Eight digital input (DIN) pull-up switches

Figure 3. TC-32-EXP rear panel components

TC input connectors, measurements, and LED
A thermocouple consists of two dissimilar metals that are joined together at one end. When the junction of themetals is heated or cooled, a voltage is produced that correlates to temperature.
You can add another 32 differential TC input connections to mini-jack connectors labeled CH32 through CH63
(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 using a wrist strap before handling thethermocouple 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 magnitude of thevoltage is within the common 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, there are three TCs connected to three different common mode voltage sources andtwo thermocouples that are not connected to anything (floating).

8

TC-32-EXP User's Guide

Functional Details

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 common 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-EXP 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 dissimilar metals at the TC-32 terminal blocks produce an additional
thermocouple junction. This junction creates a small voltage error component which must be removed from theoverall sensor measurement using a CJC technique.
The measured voltage includes both the thermocouple voltage and the cold junction voltage. To compensate forthe 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.
Data linearization
After the CJC correction is performed on the measurement data, an on-board microcontroller automaticallylinearizes 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 ortemperature).
Open-thermocouple detection (OTD)
The TC-32 is equipped with OTD for all analog input channel. With OTD, any open-circuit condition at the TC
sensor is detected by the software. An open channel is detected by the use of a pull up and pull down resistors
on the thermocouple inputs. An open thermocouple condition forces the input differential voltage outside of thevalid thermocouple voltage range. The software recognizes this as an invalid reading and flags the appropriate
channel. The software continues to sample all channels when OTD is detected.

9TC-32-EXP User's Guide

Functional Details

Input leakage current
With OTD enabled, 75 nA (max) of input leakage current is injected into the TC. This current can cause anerror voltage to develop across the lead resistance of the TC 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 × 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-EXP provides eight digital inputs and 32 digital outputs that are electrically isolated from the hostcomputer and from the TC-32-EXP analog circuits.
All DIO bits have internal pull-up resistors to 5 V that can be disabled with the rear panel slide switches.
When pull-up is disabled for a digital bit, the bit is left floating.
The recommended maximum length of the 50-pin cable used to connect the DIGITAL I/O connector to thedigital I/O signal source is 1 foot.
Digital inputs
The TC-32-EXP provides eight 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 toenable or disable the 5 V pull-up option.

Figure 5. Digital input connection example

Digital outputs/temperature alarms
The TC-32-EXP has 32 digital outputs which are open-drain. Each DO bit has a 100 kΩ pull-up resistor andcan sink up to 100 mA for direct drive applications. Use the eight PULL-UP ENABLE – DOUT slide switches toenable or disable the 5 V pull-up option.

10

TC-32-EXP User's Guide

Functional Details

Figure 6. Digital output connection example

Optionally, you can configure each digital 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 indicates when a temperaturethreshold has been exceeded.
When its pull-up is disabled, a DO bit can be used to control a device needing up to 15 V (user-provided)@ 100 mA. If the device needs more voltage/current than this, use a TC-32-EXP-controlled MOSFET 1. (userprovided) to control higher voltages and currents.
Depending on the MOSFET used, the TC-32-EXP can control up to 50 VDC @ 80 A.

Figure 7. Example of digital output/alarm controlling a relay

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

1

Metal-oxide semiconductor, field-effect transistor that uses an induced electrical field to control current through the device.
Either negative or positive gate voltages can be applied to control the current.

11TC-32-EXP User's Guide

Functional Details

Each available alarm mode and setting is explained in the following table.
Alarm input modes
Set independent temperature thresholds T1 and T2
for each alarm.

Alarm error modes

Alarm output modes

Trigger alarm when input temperature ≥ T1; reset alarm when
input temperature < T2
 Trigger alarm when input temperature ≤ T1; reset alarm when
input temperature > T2
 Trigger alarm when input temperature is < T1 or > T2
 Alarm on temperature reading only
 Alarm on temperature reading, open thermocouple, or commonmode voltage error
 Alarm on open thermocouple or common-mode voltage out-ofrange error only

Alarm disabled; digital output line can be used for normal
operation
 Alarm enabled; active low output (output line goes low whenalarm condition is met) Alarm enabled; active high output (output line goes high whenalarm condition is met) Alarm output may be latched and will not clear unless explicitly
cleared by the user
The TC-32-EXP provides three alarm indicators – the ALARM LED, the OPEN TC LED on the 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 common mode voltage out-of-range alarms.
Pull-up configuration
By default, pull-up is enabled for all eight digital inputs and all 32 digital outputs. Slide switches on the rear of
the housing can disable pull-up for each digital input bit and digital output bit.

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

2

The POWER LED turns on when you plug the power adapter into the TC-32-EXP. If a Flash LED command issent from an application, the Power LED blinks five times.
ACTIVITY LED

2

The ACTIVITY LED turns on when there is a valid connection (USB or Ethernet) and blinks when a command issent to the TC-32-EXP.
ALARM LED
The ALARM LED turns on when an alarm condition occurs.
OPEN TC LED
The OPEN TC LED turns on when there is an open thermocouple condition.

2

Both the POWER and ACTIVITY LEDs blink in firmware upgrade mode. Refer to Updating firmware on page 8.

12

TC-32-EXP User's Guide

Functional Details

TC-32 connector
Use the TC-32 connector to connect the TC-32-EXP to a host TC-32 device (sold separately). Refer to Installingthe hardware on page 7.
Refer to www.mccdaq.com for TC-32 product details.

Chassis ground connector
Provides a connection point (#6-32 screw) for chassis ground. Connect this to the chassis ground connector on
the host TC-32.

13

TC-32-EXP User's Guide

Functional Details

Mechanical drawings

Figure 8. Enclosure dimensions - front

Figure 9. Enclosure dimensions - rear14

TC-32-EXP User's Guide

Functional Details

Figure 10. Enclosure dimensions – side15

TC-32-EXP User's Guide

Functional Details

Figure 11. Circuit board dimensions

16

Chapter 4

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 typeA/D resolution
Number of channels

Delta-Sigma
24-bit32
50 Hz or 60 Hz noise filtering, softwareselectable

Filtering options
Isolation

Between any TCx channel and chassis
ground.

Channel configuration
Differential input voltage range
Absolute maximum input
voltage
Differential input impedance
Input current
Common mode rejection
Noise rejection
Input bandwidth
Crosstalk
Sample rate (Note 1)
Common mode voltage range(Note 2)
Input noise
Gain error
Offset error
Measurement sensitivity(Note 3)

Between any two TCx inputs
50 Hz filtering, power on
60 Hz filtering, power onOpen thermocouple detect disabledOpen thermocouple detect enabled
50 Hz filtering, at DC and fin=50 Hz
60 Hz filtering at DC and fin=60 Hz
50 Hz filtering at fin=50 Hz
60 Hz filtering at fin=60 Hz
50 Hz filtering
60 Hz filtering
Between any two TCx inputs
TCx channel to TCx channel
TCx channel relative to chassis
ground, fin = 60 Hz
TCx channel relative to chassis ground
50 Hz or 60 Hz filtering
50 Hz or 60 Hz filtering
50 Hz or 60 Hz filtering
Thermocouple type J,K,T,E,N
Thermocouple type R,SThermocouple type B

Warm-up time
Open thermocouple detect
response time
CJC sensor accuracy

500 VDC absolute max.
Software-selectable to match thermocouple
sensor type±78.125 mV±25 V (power on)±25 V (power off)
26 MΩ
20 MΩ
2 nA
75 nA
110 dB
110 dB
80 dB typ.
80 dB typ.
22 Hz
26 Hz
-90 dB
3 Hz max (per channel)±1.40 V
±3.5 VAC p-p±48 VDC
510 nV rms
0.004 %
3 µV
0.05 °C
0.10 °C
0.15 °C
20 minutes min
1 second±0.20 °C typ±0.40 °C max

0 °C to 45 °C

17

TC-32-EXP User's Guide

Specifications

Calibration method
Recommended warm-up time
Calibration interval

Factory
20 minutes min
1 year (factory calibration)

Note 1: The enabled thermocouple inputs are continuously converted at the maximum A/D converter rate.
Note 2: When thermocouple sensors are connected to different common mode voltages, the channels withfloating thermocouples sensors will be biased to approximately the average value of the appliedcommon mode voltages. Each of the applied common mode voltages must then be less than or equal tothe average common mode voltage ±1.40 V or [CMVapplied ≤ (CMVaverage ±1.4 V)].
Note 3: Measurement sensitivity is the smallest change in temperature that can be detected.

Channel configuration
Table 2. Channel configuration specification
Sensor Category

Condition

Specification

Thermocouple

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

32 differential channels

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 sensors
Table 3. Compatible sensor type specifications
Parameter

Specification

Thermocouple

J: –210 °C to 1200 °C
K: –270 °C to 1372 °C
R: –50 °C to 1768 °C
S: –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

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

J

K

S

R
B

SensorTemperature
(°C)
–210
0
1200
–210
0
1372
–50
250
1768
–50
250
1768
250

Accuracy Error
Maximum (°C),
15°C to 35°C
1.965
0.787
0.752
2.295
0.821
1.029
2.467
1.835
0.893
2.609
1.862
0.754
2.450

Accuracy Error
Typical (°C),
15°C to 35°C
0.910
0.361
0.371
1.061
0.376
0.504
1.111
0.825
0.361
1.174
0.837
0.305
1.090

18

Accuracy Error
Maximum (°C),
0°C to 45°C
2.167
0.816
1.148
2.520
0.852
1.560
2.655
1.961
1.519
2.810
1.992
1.346
2.707

Accuracy Error
Typical (°C),
0°C to 45°C
0.989
0.375
0.508
1.152
0.392
0.688
1.223
0.904
0.590
1.293
0.918
0.520
1.254

TC-32-EXP User's Guide

Sensor
Type

E

T

N

SensorTemperature
(°C)
700
1820
–200
0
1000
–200
0
400
–200
0
1300

Specifications

Accuracy Error
Maximum (°C),
15°C to 35°C
0.937
0.610
1.754
0.775
0.657
2.005
0.836
0.544
2.255
0.908
0.718

Accuracy Error
Typical (°C),
15°C to 35°C
0.424
0.300
0.811
0.355
0.323
0.923
0.382
0.255
1.038
0.415
0.357

Accuracy Error
Maximum (°C),
0°C to 45°C
1.136
1.056
1.933
0.806
0.989
2.207
0.874
0.659
2.481
0.949
1.157

Accuracy Error
Typical (°C),
0°C to 45°C
0.520
0.467
0.880
0.369
0.437
1.005
0.400
0.297
1.134
0.437
0.510

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 enclosure in a horizontal, upright orientation. The board should also be warmed up for therecommended 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

Number of inputs
Configuration
Input voltage range
Input type
Input characteristics
Maximum input voltage range
Pull-up configuration

8 channels
Fixed input
0 V to +15 V
CMOS (Schmitt trigger)
100 kΩ pull-up resistor, 28.7 kΩ series resistor
0 V to +20 V max (power on/off, relative to IGND pins)
All pins pulled up to +5 V via individual 100 kΩ resistors using slide switch SW5.
SW5 default positions are on (pulled up.)
500 port reads per second typ
1.3 V min, 2.2 V max
1.5 V max, 0.6 V min
0.4 V min, 1.2 V max

Transfer rate (software paced)
Input high voltage
Input low voltage
Schmitt trigger hysteresis

Table 6. Digital output specifications
Parameter

Specification

Number of outputs
Configuration
Output characteristics
Pull-up configuration

32 channels, shared with alarms
Open drain output
100 kΩ pull-up, open drain (DMOS transistor)
All pins pulled up to +5 V through individual 100 kΩ resistors using slide switches
SW1-SW4. The default positions for SW1-4 are on (pulled up.)
500 port writes per second typ
0 V to +5 V (internal 100 kΩ pull-up resistors connected to +5 V by default)
0 V to +15 V max (using external pull up resistor)
0.1 µA
100 mA max (continuous) per output pin
4ΩTransfer rate (software paced)
Output voltage range
Off state leakage current
Sink current capability
DMOS transistor on-resistance(drain to source)

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

19

TC-32-EXP User's Guide

Specifications

Temperature alarms
Table 7. Temperature alarm specifications
Parameter

Specification

Number of alarms

32, shared with digital output
Each alarm controls its associated digital output line as an alarm output. When an
alarm is enabled, its associated output line is driven 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 when input temperature >= T1, reset alarm when input temperature < T2
 Alarm when input temperature <= T1, reset alarm when input temperature > T2
 Alarm when input temperature is < T1 or > T2
Note: T1 and T2 may be independently set for each alarm.
 Alarm on temperature reading only
 Alarm on temperature reading, open thermocouple, or common-mode voltageerror Alarm on open thermocouple or common-mode voltage error only Disabled, digital output line may be used for normal operation
 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 theuser
1 second, max

Alarm functionality

Alarm input modes

Alarm error modes

Alarm output modes

Alarm latency (Note 6)

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.

MemoryTable 8. Memory specifications
Parameter

Specification

EEPROM

4,096 bytes

Microcontroller
Table 9. Microcontroller specifications
Parameter

Specification

Type

One high-performance 32-bit RISC microcontroller

LED displays
Table 10. LED and button configurations
Parameter
POWER LED (top)
ACTIVITY LED
ALARM LED
OPEN TC LED (bottom)

Specification
Indicates power on. Blinks when blink command is sent. Both the POWER andACTIVITY LEDs blink in firmware upgrade mode.
On when there is a valid connection and blinks when a command is sent to the
TC-32-EXP. Both the POWER and ACTIVITY LEDs blink in firmware upgrade
mode.
Indicates that an alarm condition is met.
Indicates that there is an open thermocouple condition.

20

TC-32-EXP User's Guide

Specifications

Environment
Table 11. Environmental specifications
Parameter

Specification

Operating temperature range
Storage temperature range
Humidity

0 °C to 45 °C–40 °C to 85 °C
0 °C to 90% non-condensing

Mechanical
Table 12. Mechanical specifications
Parameter

Specification

Dimensions (L × W × H)

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

Signal I/O connectors
Table 13. Connector specifications
Parameter

Specification

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

Thermocouple inputs, digital I/O connector, expansion connector, chassis ground

Thermocouple connector type

Thermocouple Mini-Jack (Omega PCC-SMP-V-U-100)

Digital I/O connector type50-pin IDC header

Compatible cable for the 50-pin
DIO connector
Compatible accessory productswith the C50FF-x cable

C50FF-x (where x= length in feet)

Expansion connector type40-pin IDC header

Compatible cables for the 40-pin
expansion connector

C40FF-x (where x= length in feet)

Chassis ground connector

6-32 threaded screw

CIO-MINI50
SCB-5021

TC-32-EXP User's Guide

Specifications

Table 14. Thermocouple connector pinout
Pin
J1
J2
J3
J4
J5
J6
J7
J8
J9
J10
J11
J12
J13
J14
J15
J16

Signal Name
TC32(+)
TC32(-)
TC33(+)
TC33(-)
TC34(+)
TC34(-)
TC35(+)
TC35(-)
TC36(+)
TC36(-)
TC37(+)
TC37(-)
TC38(+)
TC38(-)
TC39(+)
TC39(-)
TC40(+)
TC40(-)
TC41(+)
TC41(-)
TC42(+)
TC42(-)
TC43(+)
TC43(-)
TC44(+)
TC44(-)
TC45(+)
TC45(-)
TC46(+)
TC46(-)
TC47(+)
TC47(-)

Pin Description
CH32 sensor input (+)
CH32 sensor input (–)
CH33 sensor input (+)
CH33 sensor input (–)
CH34 sensor input (+)
CH34 sensor input (–)
CH35 sensor input (+)
CH35 sensor input (–)
CH36 sensor input (+)
CH36 sensor input (–)
CH37 sensor input (+)
CH37 sensor input (–)
CH38 sensor input (+)
CH38 sensor input (–)
CH39 sensor input (+)
CH39 sensor input (–)
CH40 sensor input (+)
CH40 sensor input (–)
CH41 sensor input (+)
CH41 sensor input (–)
CH42 sensor input (+)
CH42 sensor input (–)
CH43 sensor input (+)
CH43 sensor input (–)
CH44 sensor input (+)
CH44 sensor input (–)
CH45 sensor input (+)
CH45 sensor input (–)
CH46 sensor input (+)
CH46 sensor input (–)
CH47 sensor input (+)
CH47 sensor input (–)

Pin
J17
J18
J19
J20
J21
J22
J23
J24
J25
J26
J27
J28
J29
J30
J31
J32

22

Signal Name
TC48(+)
TC48(-)
TC49(+)
TC49(-)
TC50(+)
TC50(-)
TC51(+)
TC51(-)
TC52(+)
TC52(-)
TC53(+)
TC53(-)
TC54(+)
TC54(-)
TC55(+)
TC55(-)
TC56(+)
TC56(-)
TC57(+)
TC57(-)
TC58(+)
TC58(-)
TC59(+)
TC59(-)
TC60(+)
TC60(-)
TC61(+)
TC61(-)
TC62(+)
TC62(-)
TC63(+)
TC63(-)

Pin Description
CH48 sensor input (+)
CH48 sensor input (–)
CH49 sensor input (+)
CH49 sensor input (–)
CH50 sensor input (+)
CH50 sensor input (–)
CH51 sensor input (+)
CH51 sensor input (–)
CH52 sensor input (+)
CH52 sensor input (–)
CH53 sensor input (+)
CH53 sensor input (–)
CH54 sensor input (+)
CH54 sensor input (–)
CH55 sensor input (+)
CH55 sensor input (–)
CH56 sensor input (+)
CH56 sensor input (–)
CH57 sensor input (+)
CH57 sensor input (–)
CH58 sensor input (+)
CH58 sensor input (–)
CH59 sensor input (+)
CH59 sensor input (–)
CH60 sensor input (+)
CH60 sensor input (–)
CH61 sensor input (+)
CH61 sensor input (–)
CH62 sensor input (+)
CH62 sensor input (–)
CH63 sensor input (+)
CH63 sensor input (–)

TC-32-EXP User's Guide

Specifications

Table 15. Digital I/O connector (J33) pinout
Pin
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49

Signal Name
DOUT0
DOUT2
DOUT4
DOUT6
DOUT8
DOUT10
DOUT12
DOUT14
IGND
IGND
DOUT16
DOUT18
DOUT20
DOUT22
DOUT24
DOUT26
DOUT28
DOUT30
IGND
IGND
DIN0
DIN2
DIN4
DIN6
IGND

Pin Description
Digital Output 0 / Alarm Output 32
Digital Output 2 / Alarm Output 34
Digital Output 4 / Alarm Output 36
Digital Output 6 / Alarm Output 38
Digital Output 8 / Alarm Output 40
Digital Output 10 / Alarm Output 42
Digital Output 12 / Alarm Output 44
Digital Output 14 / Alarm Output 46
Isolated Digital GND
Isolated Digital GND
Digital Output 16 / Alarm Output 48
Digital Output 18 / Alarm Output 50
Digital Output 20 / Alarm Output 52
Digital Output 22 / Alarm Output 54
Digital Output 24 / Alarm Output 56
Digital Output 26 / Alarm Output 58
Digital Output 28 / Alarm Output 60
Digital Output 30 / Alarm Output 62
Isolated Digital GND
Isolated Digital GND
Digital Input 0
Digital Input 2
Digital Input 4
Digital Input 6
Isolated Digital GND

Pin
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50

Signal Name
DOUT1
DOUT3
DOUT5
DOUT7
DOUT9
DOUT11
DOUT13
DOUT15
IGND
IGND
DOUT17
DOUT19DOUT21
DOUT23
DOUT25
DOUT27
DOUT29DOUT31
IGND
IGND
DIN1
DIN3
DIN5
DIN7
IGND

Pin Description
Digital Output 1 / Alarm Output 33
Digital Output 3 / Alarm Output 35
Digital Output 5 / Alarm Output 37
Digital Output 7 / Alarm Output 39
Digital Output 9 / Alarm Output 41
Digital Output 11 / Alarm Output 43
Digital Output 13 / Alarm Output 45
Digital Output 15 / Alarm Output 47
Isolated Digital GND
Isolated Digital GND
Digital Output 17 / Alarm Output 49
Digital Output 19 / Alarm Output 51
Digital Output 21 / Alarm Output 53
Digital Output 23 / Alarm Output 55
Digital Output 25 / Alarm Output 57
Digital Output 27 / Alarm Output 59
Digital Output 29 / Alarm Output 61
Digital Output 31 / Alarm Output 63
Isolated Digital GND
Isolated Digital GND
Digital Input 1
Digital Input 3
Digital Input 5
Digital Input 7
Isolated Digital GND

Table 16. Expansion connector (J34) pinout
Pin

Signal Name

Pin Description

Pin

Signal Name

Pin Description

1

+12VA

+12 VA power input

2

AGND

Isolated Analog GND

3

+12VA

+12 VA power input

4

AGND

Isolated Analog GND

5

+5VA

+5 VA power input

6

AGND

Isolated Analog GND

7

+5VA

+5 VA power input

8

AGND

Isolated Analog GND

9

+5VA

+5 VA power input

10

AGND

Isolated Analog GND

11

+5VA

+5 VA power input

12

AGND

Isolated Analog GND

13

Note 7+3.3VA+3.3 VA power input

14

AGND

Isolated Analog GND

15+3.3VA+3.3 VA power input

16

AGND

Isolated Analog GND

17+3.3VA+3.3 VA power input

18

AGND

Isolated Analog GND

19+3.3VA+3.3 VA power input

20

AGND

Isolated Analog GND

21
23
25
27
29
31
33
35
37
39

CS
SCK
MOSI
MISO
IRQ
RSVD
RSVD
RSVD
RSVD
AGND

Chip selectSerial clock
Master output data
Master input data
Interrupt request
Reserved
Reserved
Reserved
Reserved
Isolated Analog GND

22
24
26
28
30
32
34
36
38
40

AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND

Isolated Analog GND
Isolated Analog GND
Isolated Analog GND
Isolated Analog GND
Isolated Analog GND
Isolated Analog GND
Isolated Analog GND
Isolated Analog GND
Isolated Analog GND
Isolated Analog GND

Note 7: Power supplies (+12 VA, +5 VA, 3.3 VA) located at connector J34 are intended for use with the

TC-32-EXP only.

23

Declaration of Conformity
According to ISO/IEC 17050-1:2010
Manufacturer:
Address:

Product Category:
Date and Place of Issue:
Test Report Number:

Measurement Computing Corporation
10 Commerce Way
Suite 1008
Norton, MA 02766
USAElectrical equipment for measurement, control and laboratory use.
October 15, 2015, Norton, Massachusetts USA
EMI6774.15

Measurement Computing Corporation declares under sole responsibility that the product(s)TC-32-EXP
Complies with the essential requirements of the following applicable European Directives:
Electromagnetic Compatibility (EMC) Directive 2004/108/EC
Low Voltage Directive 2006/95/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 therestricted substances in concentrations/applications not permitted by the RoHS Directive.

Carl Haapaoja, Director of Quality Assurance

Measurement Computing Corporation
10 Commerce Way
Norton, Massachusetts 02766(508) 946-5100
Fax: (508) 946-9500
E-mail: info@mccdaq.com
www.mccdaq.com

NI Hungary Kft
H-4031 Debrecen, Hátar út 1/A, Hungary
Phone: +36 (52) 515400
Fax: +36 (52) 515414
http://hungary.ni.com/debrecen