E-TC

Ethernet-based 8-Channel Thermocouple Input Device

User's Guide

July 2016. Rev 3A© Measurement Computing Corporation

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 E-TC

2

Table of Contents
Preface

About this User's Guide ....................................................................................................................... 5
What you will learn from this user's guide ......................................................................................................... 5
Conventions in this user's guide ......................................................................................................................... 5
Where to find more information ......................................................................................................................... 5
Chapter 1

Introducing the E-TC............................................................................................................................. 6
Ethernet interface ................................................................................................................................................ 6
Functional block diagram ................................................................................................................................... 6
Chapter 2

Installing the E-TC................................................................................................................................. 7
Unpacking........................................................................................................................................................... 7
Installing the software ........................................................................................................................................ 7
Connecting the external power adapter .............................................................................................................. 7
Installing the hardware ....................................................................................................................................... 7
Configuring network settings ............................................................................................................................. 7
Address mode settings ...................................................................................................................................................... 7
IP address settings............................................................................................................................................................. 8Connection code ............................................................................................................................................................... 8

Configuring the network router for communication across networks ................................................................ 8
Calibrating the hardware..................................................................................................................................... 9

Factory calibration ............................................................................................................................................................ 9
Field calibration ................................................................................................................................................................ 9Updating firmware .............................................................................................................................................. 9
Restoring factory default network settings ......................................................................................................... 9
Chapter 3

Functional Details ............................................................................................................................... 10
External components ........................................................................................................................................ 10
Screw terminals................................................................................................................................................................10
LED status indicators .......................................................................................................................................................11RESET button ..................................................................................................................................................................11
Ethernet connector ...........................................................................................................................................................11
External power connector ................................................................................................................................................11

Signal connections ............................................................................................................................................ 11
TC input ...........................................................................................................................................................................11
Digital I/O ........................................................................................................................................................................12Counter input ...................................................................................................................................................................15
Power output ....................................................................................................................................................................15
Ground .............................................................................................................................................................................15

Mechanical drawings ........................................................................................................................................ 16
DIN-rail compatible .........................................................................................................................................................18

Chapter 4

Specifications ...................................................................................................................................... 19
Thermocouple input .......................................................................................................................................... 19
Channel configurations ..................................................................................................................................... 20
Compatible thermocouples ............................................................................................................................... 20
Accuracy ........................................................................................................................................................... 20
Thermocouple measurement accuracy .............................................................................................................................20

Digital input/output........................................................................................................................................... 213

E-TC User's Guide

Temperature alarms .......................................................................................................................................... 22
Counter ............................................................................................................................................................. 22
Memory ............................................................................................................................................................ 22Power ................................................................................................................................................................ 23
Network ............................................................................................................................................................ 23
Ethernet connection .........................................................................................................................................................23
Network interface ............................................................................................................................................................23
Network factory default settings ......................................................................................................................................23
Network security ..............................................................................................................................................................24

LED displays and the factory reset button ........................................................................................................ 24
Environment ..................................................................................................................................................... 24
Mechanical ....................................................................................................................................................... 24
Screw terminal connector ................................................................................................................................. 25
Declaration of Conformity .................................................................................................................. 26

4

Preface

About this User's Guide
What you will learn from this user's guideThis user's guide describes the Measurement Computing E-TC data acquisition device and lists device
specifications.

Conventions in this user's guide
For more information
Text presented in a box signifies additional information related to the subject matter.
Caution! Shaded caution statements present information to help you avoid injuring yourself and others,
damaging your hardware, or losing your data.
bold text

Bold text is used for the names of objects on a screen, such as buttons, text boxes, and check boxes.

italic text

Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.

Where to find more information
Additional information about E-TC hardware is available on our website at www.mccdaq.com. You can also
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.

5Chapter 1

Introducing the E-TC

The E-TC is an Ethernet-based thermocouple (TC) data acquisition device that provides the following features:











Eight 24-bit differential TC inputs
TC channels field-to-host isolation
4 S/s per channel update rate
Support for type J, K, R, S, T, N, E, and B thermocouples, software-selectable per channel
Two integrated cold junction compensation (CJC) sensors (one per four TC inputs)
Open thermocouple detection (OTD) to detect faulty TC connections
Eight individually-configurable digital I/O channels, isolated from TC channels±24 mA drive capability
10/100 Ethernet interface
Powered by the included +5 V external power adapter (PS-5V1AEPS)

Ethernet interface
The E-TC has a built-in 10/100 BASE-T auto-negotiation, high-speed communication port. You can remotely
access and configure your E-TC from anywhere on the network. Only one computer can control the E-TC at
one time. The networking protocols are TCP and UDP.
A unique media access control (MAC) address is assigned to each device at the factory. You configure the
Ethernet connection settings through software. The network name uses the format E-TC-xxxxxx, where
xxxxxx are the lower six digits of the factory-assigned MAC address.

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

Figure 1. E-TC functional block diagram

6

Chapter 2

Installing the E-TC
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 Quick Start and the E-TC product page on our website for information about theavailable software.
Install the software before you install your device
The driver needed to run the E-TC 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 power adapter
Power to the E-TC is provided with the 5 volt, 1 amp external power adapter (PS-5V1AEPS). Connect theadapter cord to the power connector on the E-TC, and plug the AC adapter into an electrical outlet.
The Power LED turns on when 5 V power is supplied to the E-TC. If the voltage supply is less than 4.2 V or
more than 5.6 V, the POWER LED does not turn on.
Refer to Figure 2 on page 11 for the location of the Power LED.

Installing the hardware
The E-TC requires a TCP/IP and UDP connection to a network or computer. Use the standard Ethernet cableprovided to connect the E-TC to a 10Base-T or 100Base-TX compatible Ethernet port, hub, or switch.
When connecting the E-TC 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 Link/activity LED on thelower left of the Ethernet connector turns on when there is a valid Ethernet link, and blinks when network
activity is detected.
Once the E-TC 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 thedefault configuration by following the instructions in the Restoring factory default network settings on page 9.
Once a connection is established and you can communicate to the device, you can change the configuration forother network scenarios.

Configuring network settings
The following E-TC network settings are software-selectable. Only one user at a time can connect to the E-TC
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, andgateway) are assigned to the E-TC or an auto-addressing method is used to assign these parameters.
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E-TC User's Guide

Installing the E-TC

DHCP or link-local enabled (default)
If connected to a network with a DHCP server, the service automatically assigns IP addresses to the E-TC.
If the connected network does not have a DHCP server, the address stored in the default IP address is assigned
to the E-TC.
If the E-TC 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
E-TC and the device to which it is connected
DHCP Only
Enables configuration by a DHCP server, if one is available. The E-TC is assigned an IP address shortly after it
is powered up and attached to the network.
Link Local Only
The E-TC is assigned a link-local IP address by the Windows PC or other host that supports link-local
addressing. A link-local address is valid only for communications between the E-TC and the device to which it
is connected.
StaticThe default IPv4 Address is manually configured on the E-TC.

IP address settings
The default settings of the following IP address are assigned to the E-TC when automatic 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 stored on the E-TC . The subnet mask determines the number ofbits 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 the E-TC. The gateway address of the device thatbridges 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 this number from its
default of 0 to prevent other users from connecting to and configuring the device. The device remains visible toother users on the network, but connection by another user is not allowed.

Configuring the network router for communication across networks
In order to communicate with the E-TC from a computer connected to a different network – such as over theInternet – you must change the network configuration of the network router.
In the following procedure, the E-TC 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 significantly disrupt a network.
1.

Determine the IP address of the device. If the address was assigned by DHCP, it is recommended youchange 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:ooUDP:54211 (discovery)
TCP:54211 (commands)

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E-TC User's Guide

3.

Installing the E-TC

On the computer connected to the client LAN, manually enter the WAN address of the host router, andspecify the ports that were forwarded to connect to the remote E-TC.

Calibrating the hardware
Factory calibration
The Measurement Computing Manufacturing Test department performs the initial factory calibration. Returnthe device to Measurement Computing Corporation when calibration is required. The recommended calibrationinterval is one year.

Field calibration
The E-TC also supports field calibration. as an alternative to returning the device for factory calibration. The
same recommended one-year calibration interval applies.
The following items are required to perform field calibration on an E-TC:a precision voltage source
a voltmeter

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

Updating firmware
Your DAQ device contains firmware that can be updated in the field if required. Firmware is available fordownload at www.mccdaq.com/firmware.aspx. MCC recommends that you check this page periodically to see
if an update to your device firmware is available.

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 andActivity LEDs blink twice and then turn off, indicating that network settings have been restored to default
values.

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.

Holding in the Reset button too long may cause the device to enter bootloader mode
Holding the Reset button in after the Power and Activity LEDs blink may cause the device to enter firmware
update (bootloader) mode. In this mode both LEDs continuously blink. If this occurs, cycle the power to returnthe device to normal operation.
If InstaCal is open when default settings are restored, click the Refresh Boards button on the InstaCal toolbar
to reflect the changes.

9Chapter 3

Functional Details
External components
The E-TC has the following external components:






Screw terminals
LED status indicators
Ethernet connector
External power connector
Factory reset button

Screw terminals
The E-TC screw terminals provide the following connections:






Eight differential (CH0H/CH0L to CH7H/CH7L) thermocouple input connections
Eight digital I/O connections (DIO0 to DIO7)
One counter input (CTR)
One voltage output (+VO)
Five digital grounds (GND) and one chassis ground (CHGND)

The location of each signal is shown in Figure 2.

Figure 2. E-TC pinout

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E-TC User's Guide

Functional Details

The remaining components are on the top edge of the enclosure; refer to Figure 3:

1
2
3

External power connector
Ethernet connector with green Link/activity LED(left) and yellow Speed LED (right)
Power LED (top)4
5

Activity LED (bottom)
Factory reset button

Figure 3. E-TC connectors, reset button, and status LEDs

LED status indicators
The E-TC has two LED indicators that indicate the status of power and host communications:

The Power LED is on when external power between 4.2 V to 5.6 V is supplied.
This LED is off when the external power supply is not connected, or the input power is outside of the 4.2 V
to 5.6 V voltage range of the external supply, causing a power fault.
The E-TC has an onboard voltage supervisory circuit that monitors the 5 V external power supply.
The Activity LED is on when a valid host connection is detected.
This LED blinks when a command is received.

Both Power and Activity LEDs blink once when factory default settings are restored. Refer to Restoring factory
default network settings on page 9 for more information.

RESET button
Press and hold this button to restore the E-TC to its factory default network settings. Both Power and Activity
LEDs blink once when factory default settings are restored. Refer to Restoring factory default network settings
on page 9 for more information.

Ethernet connector
The E-TC 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 distance without using a repeater is 100 meters.

External power connector
Connect the PS-5V1AEPS power supply to this connector. The power supply provides 5 VDC, 1 A power to the
E-TC.

Signal connections
TC inputA 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.
The E-TC supports type J, K, S, R, B, E, T, N thermocouples.
When TCs are attached to conductive surfaces, the voltage differential between multiple TCs must remain
within ±1.8 V. For best results, MCC recommends using electrically insulated TCs when connected toelectrically charged surfaces if possible.
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E-TC User's Guide

Functional Details

Caution! MCC strongly recommends that you ground yourself using a wrist strap before handling thethermocouple sensors.
Hardware compatibility
The E-TC is functionally equivalent to USB-TC hardware. Software programs written for those devices using
the Universal Library can be run with the E-TC.
Cold junction compensation (CJC)
Each group of four TC inputs has a high-resolution CJC sensor. When you connect the thermocouple sensor
leads to the sensor input channel, the dissimilar metals at the E-TC 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 E-TC 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 E-TC is equipped with OTD for all TC input channels. 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.
Input leakage current
With OTD enabled, 65 nA (typical) 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 × 65 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, 1 nA (typical) of input leakage
current is injected into the TC.

Digital I/O
The E-TC has eight digital I/O channels that are electrically isolated from the analog circuits. Each bit isindividually configurable for input or output. The digital I/O transfer rate is 5 kHz maximum for software-paced
operation on a local network.
When you configure the digital bits for input, you can use the E-TC digital I/O terminals to detect the state of
any TTL-level input. Refer to the schematic shown in Figure 4. If you set the switch to the +5V input, DIO0
reads TRUE (1). If you move the switch to GND, DIO0 reads FALSE (0).

12E-TC User's Guide

Functional Details

Figure 4. Schematic showing switch detection by digital channel DIO0

Pull-up/down configuration
All DIO channels are pulled high by default to 5 V through 47 kΩ resistors with jumper W1 on the circuit board(see Figure 5). Each jumper configures a digital port for pull-up or pull-down.

Figure 5. Pull-up/down jumper locations

Figure 6 below shows the jumper configured for pull-up and pull-down.
Caution! The discharge of static electricity can damage some electronic components. Take care whenremoving the enclosure. Before touching the board, ground yourself using a wrist strap or touch
the computer chassis or other grounded object to eliminate any stored static charge.

Figure 6. Pull-up/down jumper configurations, typical

For more information about digital signal connections
For general information about digital signal connections and digital I/O techniques, refer to the Guide to DAQ
Signal Connections (available on our web site at www.mccdaq.com/support/DAQ-Signal-Connections.aspx).
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E-TC User's Guide

Functional Details

When configured for input, input voltage ranges of 0 V to 5 V are permitted, with thresholds of 0.8 V (low) and
2.0 V (high). A typical digital input connection is shown in Figure 7.

Figure 7. Digital input connection example

Temperature alarms
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. Alarms can also indicate an OTC condition.
A digital output bit can be used to control a logic device needing up to 5 V @ 24 mA. If the device needs morevoltage/current than this, use a E-TC-controlled MOSFET 1. (user-provided) to control higher voltages andcurrents.
Depending on the MOSFET used, the E-TC can control higher voltages and currents.
Figure 8 shows a relay requiring 24 VDC @ 100 mA controlled by an E-TC digital output/alarm.
The MOSFET in this example is a relay and is rated for 14 amps and 50 volts DC.

Figure 8. 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.

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E-TC User's Guide

Functional Details

Each available alarm mode and setting is explained below.
Alarm input modes
Set independent temperature thresholds T1 and T2 foreach alarm.
Alarm error modes

Alarm output modes

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
 Alarm on temperature reading only
 Alarm on temperature reading or open thermocouple error
 Alarm on open thermocouple error only

Disabled, digital I/O line may be used for normal operation
Enabled, active high output (DIO line goes high when alarm
condition is met) Enabled, active low output (DIO line goes low when alarm
condition is met)Counter input
The CTR terminal is a 32-bit event counter that can accept frequency inputs up to 10 MHz. The internal counterincrements when the TTL levels transition from low to high.

Power output
The +VO terminal can output up to 10 mA maximum. You can use this terminal to supply power to external
devices or circuitry.
Caution! The +VO terminal is an output. Do not connect it to an external power supply or you may damage
the device and possibly the computer.

GroundThe digital ground (GND) terminals provide a common ground – isolated from TC inputs – for the digital andcounter channels and the +VO terminal.
The chassis ground (CHGND) terminal provides a connection point for chassis ground. Connect this to an
external grounding source.

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E-TC User's Guide

Functional Details

Mechanical drawings

Figure 9. E-TC device circuit board dimensions

16

E-TC User's Guide

Functional Details

Figure 10. E-TC bottom enclosure dimensions17

E-TC User's Guide

Functional Details

Figure 11. E-TC top enclosure dimensions

DIN-rail compatible
The E-TC can be mounted on a DIN rail using the ACC-205 DIN-rail accessory kit. Refer to our website formore information.

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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. Thermocouple input specifications
Parameter

Condition

Specification

A/D converters
ADC resolution
Number of channels
Input isolation
Channel configuration
Differential input voltage range(Note 1)
Absolute maximum input
voltage
Differential input impedance
Input current
Common mode rejection
Noise rejection
Input bandwidth
Crosstalk
Sample rate (Note 2)
Input noise
Gain error
Offset error
Measurement sensitivity(Note 3)

Delta-Sigma
24 bits
8
Between any TCx channel anddigital/chassis ground.

Software-selectable to match sensor type±0.128 V
Between any two TCx inputs
Open thermocouple detectdisabled
Open thermocouple detectenabledfIN = 50 Hz or 60 Hz
fIN = 50 Hz or 60 Hz
Between any two TCx inputs

Thermocouple type J,K,T,E,N
Thermocouple type R,SThermocouple type B

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

Note 2:
Note 3:±25 V (power on)±25 V (power off)
40 MΩ
1 nA
65 nA
100 dB
75 dB
10 Hz–90 dB
4 Hz max (per channel)
250 nV rms
0.006 %
3 µV
0.09 °C
0.11 °C
0.13 °C
20 minutes min
1 second±0.20 °C typ±0.40 °C max
Factory
20 minutes min
1 year (factory calibration)

0 °C to 45 °C

Calibration method
Recommended warm-up time
Calibration interval
Note 1:500 VDC absolute max

Calibration is performed at ±70 mV.
The enabled thermocouple inputs are continuously converted at the maximum A/D converter rate. If
channels are enabled and have an open thermocouple connection the sampling rate will be lower.
Measurement sensitivity is the smallest change in temperature that can be detected.

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E-TC User's Guide

Specifications

Channel configurations
Table 2. Channel configuration specifications
Sensor Category

Condition

Specification

Thermocouple

J, K, S, R, B, E, T, or N
The factory default configuration isType J.

8 differential channels (Note 4)

Channel configuration is stored on EEPROM external to the isolated microcontroller by thefirmware whenever any item is modified. Modification is performed by commands issued over
Ethernet from an external application, and the configuration is made non-volatile through the use of
the EEPROM.

Note 4:Compatible thermocouples
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 (Note 5, Note 6)
All specifications are (±).
Sensor
Type

J

K

S

R

B

E

SensorTemperature (°C)

Accuracy Error
Maximum (°C),
15 °C to 35 °C

Accuracy Error
Typical (°C),
15 °C to 35 °C

Accuracy Error
Maximum (°C),
0 °C to 45 °C

Accuracy Error
Typical (°C),
0 °C to 45 °C

–210
0
1200
–210
0
1372
–50
250
1768
–50
250
1768
250
700
1820
–200
0
1000

1.896
0.760
0.717
2.196
0.787
0.974
2.144
1.595
0.750
2.266
1.617
0.631
1.934
0.740
0.482
1.700
0.752
0.629

0.823
0.328
0.324
0.938
0.334
0.431
0.711
0.528
0.178
0.749
0.534
0.148
0.453
0.179
0.137
0.742
0.327
0.285

2.228
0.815
1.336
2.578
0.848
1.807
2.566
1.888
1.759
2.715
1.917
1.579
2.552
1.128
1.213
1.987
0.806
1.142

0.990
0.364
0.585
1.141
0.377
0.786
1.053
0.775
0.649
1.113
0.786
0.584
0.977
0.439
0.492
0.884
0.360
0.500

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E-TC User's Guide

SensorType

T

N

Specifications

SensorTemperature (°C)

Accuracy Error
Maximum (°C),
15 °C to 35 °C

Accuracy Error
Typical (°C),
15 °C to 35 °C

Accuracy Error
Maximum (°C),
0 °C to 45 °C

Accuracy Error
Typical (°C),
0 °C to 45 °C

–200
0
400
–200
0
1300

1.920
0.801
0.519
2.125
0.857
0.668

0.817
0.339
0.223
0.876
0.351
0.291

2.253
0.870
0.702
2.518
0.940
1.352

0.993
0.385
0.308
1.101
0.412
0.585

Note 5:Note 6:

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 has been warmed up for the recommended 20 minutes. Errors shown do not include
inherent thermocouple error. Contact your thermocouple supplier for details on the actual
thermocouple accuracy error.
When thermocouples are attached to conductive surfaces, the voltage differential between multiple
thermocouples must remain within ±1.8 V. For best results MCC recommends using electricallyinsulated thermocouples when possible.

Digital input/output
Table 5. Digital input/output specifications
Parameter

Specification

Digital type
Number of I/O
Configuration
Power on conditions
Pull-up/pull-down
configuration
Digital I/O transfer rate(system paced)
Power on and reset state
Input high voltage threshold
Input high voltage limit
Input low voltage threshold

5 V TTL input / CMOS output
One port of 8 bits, shared with temperature alarms
Each bit can be independently configured for input or output
Power on reset is input mode, except when bits are configured to operate as alarms.
The port has 47 kΩ resistors configurable as pull-up (default) or pull-down via internal
jumper W1.

Input low voltage limit
Output high voltage
Output low voltage
Note 7:100 to 5000 reads / writes per second, typical, on a local network (Note 7)
All bits are input unless the temperature alarm functionality is enabled for them.
2.0 V min
5.5 V absolute max
0.8 V max
–0.5 V absolute min
0 V recommended min
4.4 V min (IOH = –50 µA)
3.76 V min (IOH = –24 mA)
0.1 V max (IOL = 50 µA)
0.44 V max (IOL = 24 mA)

This is the typical throughput when the device and host are both connected by Ethernet to the same
local network. Throughput can vary significantly, and typical throughput is not guaranteed, if awireless connection is involved or data is sent over the internet.

21

E-TC User's Guide

Specifications

Temperature alarms
Table 6. Temperature alarm specifications
Parameter

Specification

Number of alarms

8 (one per digital I/O line)
Each alarm controls its associated digital I/O line as an alarm output. When an alarm isenabled, its associated I/O line is set to output and 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
T1 and T2 may be independently set for each alarm.
 Alarm on temperature reading only
 Alarm on temperature reading or open thermocouple error
 Alarm on open thermocouple error only Disabled, digital I/O line may be used for normal operation
 Enabled, active high output (DIO line goes high when alarm condition is met) Enabled, active low output (DIO line goes low when alarm condition is met)
1 second

Alarm functionality

Alarm input modes

Alarm error modes

Alarm output modes
Alarm latency (Note 8)
Note 8:

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.

CounterTable 7. Counter specifications
Parameter

Specification

Counter type
Number of channels
Input type
Resolution
Schmitt trigger hysteresis

Event counter
1
Schmitt trigger; fixed 47.5 kΩ pull-down resistor
32 bits
0.6 V min
1.7 V max
1.9 V min
3.6 V max
5.5 V absolute max
1.0 V min2.3 V max
–0.5 V absolute min
0 V recommended min
10 MHz max
50 ns min
50 ns min

Input high voltage threshold
Input high voltage limit
Input low voltage threshold
Input low voltage limit
Input frequency
High pulse width
Low pulse width

MemoryTable 8. Memory specifications
Parameter

Specification

EEPROM

4,096 bytes

22

E-TC User's Guide

Specifications

Power
Table 9. Power specifications
Parameter

Conditions

Specification

External power supply
Supply current
User output voltage range

Quiescent current
Available at +VO terminal

User output current
Isolation

Available at +VO terminal
Measurement system to chassis ground

Note 9:5 V ±5% required
5 V, 1 A supply provided (PS-5V1AEPS)
177 mA typical (Note 9)
4.40 V min to 5.25 V max; assumes
supplied AC adapter is used
10 mA max
500 VDC min

This is the total quiescent current requirement for the device that includes the LEDs. This value does
not include any potential loading of the digital I/O bits or +VO terminal.

Network
Ethernet connection
Table 10. Ethernet connection specifications
Parameter
Ethernet typeCommunication rates
Connector
Cable length
Additional parameters

Specification
100 Base-TX
10 Base-T
10/100 Mbps, auto-negotiated
RJ-45, 8 position
100 meters (328 feet) max
HP Auto-MDIX support

Network interface
Table 11. Factory default specifications
Parameter

Specification

Protocols used

TCP (IPv4 only) and UDP
UDP: 54211 (discovery)
UDP: 6234 (bootloader only)
TCP: 54211 (commands)
DHCP + link-local, DHCP, static, link-local
E-TC-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

Network ports used
Network IP configuration
Network name
Network name publication

Network factory default settings
Table 12. Factory default specifications
Parameter

Specification

Factory default IP address
Factory default subnet mask
Factory default Gateway
Factory default DHCP
setting

192.168.0.101
255.255.255.0
192.168.0.1
DHCP + link-local enabled23

E-TC User's Guide

Specifications

Network security
Table 13. Factory default specifications
Parameter
Security implementation
Number of concurrent sessions
Vulnerabilities

Specification
TCP sockets are not opened unless application sends the correct PIN connection
code; stored in non-volatile memory; may be changed by user; default value is 0000
1
TCP Sequence Number Approximation Vulnerability

LED displays and the factory reset button
Table 14. LED and button configurations
Parameter

Specification
On: 4.2 V < Vext < 5.6 V
Off: Vext < 4.2 V, Vext > 5.6 V (power fault)
Power and Activity LEDs blink continuously in firmware update mode
 On: A valid host connection is established.
 Blinks: A command is received.
Power and Activity LEDs blink continuously in firmware update mode
 Left (green): Link/activity indicator; on when there is a valid Ethernet link, andblinks when network activity is detected.
 Right (yellow): Speed indicator; on for 100 Mbps, off for 10 Mbps or no link.
Resets network and alarm configuration settings to factory default values.
 Press and hold for 4 seconds. The Power and Activity LEDs will both blink twice
and turn off to indicate that network settings have been restored to default values.
Release the button to allow the device to reset and use the default settings.
If the reset button is released before the two LEDs blink, settings are not affected.
 Holding the reset button at power on forces the device into firmware update modein case of a failed firmware update. In this mode, both LEDs blink together
constantly. The device may be returned to normal operation by cycling the power.
Power LED (top)Activity LED (bottom)
Ethernet connector LEDS

Factory reset button

Environment
Table 15. Environmental specifications
Parameter

Specification

Operating temperature range
Storage temperature range
Humidity

0 °C to 55 °C–40 °C to 85 °C
0 °C to 90% non-condensing

Mechanical
Table 16. Mechanical specifications
Parameter

Specification

Dimensions (L × W × H)

117.9 × 82.8 × 29.0 mm (4.64 × 3.26 × 1.14 in.)24

E-TC User's Guide

Specifications

Screw terminal connector
Table 17. Screw terminal connector specifications
Parameter

Specification

Connector type
Wire gauge range

Screw terminal
16 AWG to 30 AWG

Table 18. Screw terminal pinout
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

Signal Name
CH0H
CH0L
CH1H
CH1L
CH2H
CH2L
CH3H
CH3L
CH4H
CH4L
CH5H
CH5L
CH6H
CH6L
CH7H
CH7L

Pin Description
CH0 sensor input (+)
CH0 sensor input (–)
CH1 sensor input (+)
CH1 sensor input (–)
CH2 sensor input (+)
CH2 sensor input (–)
CH3 sensor input (+)
CH3 sensor input (–)
CH4 sensor input (+)
CH4 sensor input (–)
CH5 sensor input (+)
CH5 sensor input (–)
CH6 sensor input (+)
CH6 sensor input (–)
CH7 sensor input (+)
CH7 sensor input (–)

Pin
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

25

Signal Name
DIO0
DIO1
DIO2
DIO3
GND
DIO4
DIO5
DIO6
DIO7
+VO
GND
GND
GND
CTR
GND
CHGND

Pin Description
DIO channel 0
DIO channel 1
DIO channel 2
DIO channel 3
Digital ground
DIO channel 4
DIO channel 5
DIO channel 6
DIO channel 7
User voltage output
Digital ground
Digital ground
Digital ground
Counter input
Digital ground
Chassis ground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
Norton, MA 02766
USAElectrical equipment for measurement, control and laboratory use.
September 12, 2014, Norton, Massachusetts USA
EMI6836.16

Measurement Computing Corporation declares under sole responsibility that the product

E-TC
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

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