Peak MU-Thermocouple1 CAN User manual

MU-Thermocouple1 CAN
Temperature Measurement Unit with CAN
Connection
User Manual

MU-Thermocouple1 CAN – User Manual
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Products taken into account
Product Name Model Item Number
MU-Thermocouple1 CAN
(MU-TC1 CAN)
Metal-cased measuring unit
with 8 measuring channels
IPEH-002205
The cover page shows the product MU-TC1 CAN with thermocouple connectors for
the type J (black). Versions with assemblies for other thermocouple types have an
identical casing design.
Attention! Follow the safety instructions in section 3.1 on page
10 that also refer to the warning sign printed on the unit casing.
Product names mentioned in this manual may be the trademarks or registered
trademarks of their respective companies. They are not explicitly marked by “™” and
“®”.
© 2009 PEAK-System Technik GmbH
PEAK-System Technik GmbH
Otto-Roehm-Strasse 69
64293 Darmstadt
Germany
Phone: [phone]
Fax: [phone]
www.peak-system.com
[e-mail]
Issued 2009-02-16

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Contents
1Introduction 4
1.1 Properties at a Glance 4
1.2 Prerequisites for the Operation 5
1.3 Scope of Supply 5
2Connectors 6
2.1 Thermocouple Sockets 6
2.2 CAN (D-Sub Connector) 7
2.3 Supplying External Devices via the CAN
Connector 7
2.4 Power Supply Socket 9
3Use 10
3.1 Safety Instructions 10
3.2 Operation with Default Configuration 10
4Configuring the Measuring Unit 12
4.1 Prerequisites for Configuring via CAN 12
4.2 Simple Configuring 13
4.3 Advanced Configuring 14
5Technical Specifications 15
Appendix A CE Certificate 17
Appendix B Dimension Drawings 18

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1Introduction
The measuring unit Thermocouple1 MU-CAN (short: MU-TC1 CAN)
provides terminals for 8 thermocouples for various temperature
ranges. The readings are preprocessed by a microcontroller and
then transmitted via CAN bus. The corresponding configuring is
done with a Windows program on a computer that is connected to
the same CAN bus.
1.1 Properties at a Glance
8 sockets for thermocouple types J, K, and T (depending on
assembly at delivery)
4 galvanically isolated measuring modules, each with 2
thermocouple sockets of the same type
Measurement accuracy: 0.2 %
Precision of the reference sensors: ±0.5 K at +25 °C
Temperature resolution at CAN communication: 1/16 K
Preprocessing of readings possible with integrated
microcontroller, e.g. with hysteresis curve, characteristic curve,
or mathematical functions (software available on application)
High-speed CAN connection (ISO 11898-2) for data transfer and
configuring
Metal casing with attachment grooves and connectors on the
front panel

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1.2 Prerequisites for the Operation
The following prerequisites must be given, so that the measuring
unit can be used properly:
Power supply 12 V DC nominal (6 - 32 V possible), connected via
supplied mating connector
For configuring of the measuring unit via CAN:
Computer with Windows Vista, XP SP2, or 2000 SP4
CAN interface of the PCAN series for the computer (e.g. PCAN-
USB or PCAN-PCI)
Installed device driver for the CAN interface
CAN connection between the computer and the measuring unit
1.3 Scope of Supply
The scope of supply normally consists of the following parts:
Measuring unit MU-TC1 CAN in an aluminum casing
Mating connector for the power supply
CD with software and documentation

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2Connectors
This chapter deals with all connectors on the measuring unit.
2.1 Thermocouple Sockets
The measuring unit MU-TC1 CAN supports the following types of
thermocouples (according to the assembly of the measuring unit):
Type Color (IEC 584) Temperature range
J black -210 - +1121 °C
K green -200 - +1370 °C
T brown -200 - +400 °C
The connection is done with a 2-pin standard thermocouple
connector according to DIN EN 50212. The color of the
thermocouple socket shows the thermocouple type to be used
according to the standard IEC 584 (see table above).
Note: Connecting the wrong type of thermocouple leads to
measurement errors.
Due to the different sizes of pins on a thermocouple connector a
reverse polarity protection is ensured.
Figure 1: Standard connector for a thermocouple

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2.2 CAN (D-Sub Connector)
A High-speed CAN bus (ISO 11898-2) is connected to the 9-pin
D-Sub connector. The pin assignment corresponds to the CiA
recommendation 102 DS.
Figure 2: Pin assignment High-speed CAN bus
(view onto the male D-Sub connector of the measuring unit)
2.3 Supplying External Devices via the CAN
Connector
A 5-Volt supply can be routed to pin 1 of the D-Sub CAN connector
by setting a solder bridge on the controller board of the measuring
unit. Thus external devices with low power consumption (e.g. bus
converters) can be directly supplied via the CAN connector.
The 5-Volt supply is connected to the power supply of the
measuring unit and is not fused separately. For galvanic isolation
the measuring unit contains an interconnected DC/DC converter.
Therefore the current output is limited to 100 mA.

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Attention! Risk of short circuit! The measuring unit's
electronics or connected electronics may be damaged.
If the option described in this section is activated, you may only
connect or disconnect CAN cables or peripheral devices (e.g.
bus converters) to or from the measuring unit while it is
disconnected from the power supply (de-energized).
Do the following to activate the 5-Volt supply at the CAN
connector:
1. Take off any connected cable from the measuring unit.
2. Remove the four screws on the front panel in order to
detach it.
3. Pull out the right board (has the D-Sub connector) of the
casing.
4. On the bottom side of the board set a solder bridge on the
position as marked in the following figure. During this
procedure take especially care not to produce unwanted
short circuits on the board.
Figure 3: Position of the solder bridge on the bottom side of the controller board

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2.4 Power Supply Socket
The measuring unit is operated with 12 V DC, 6 to 34 V are possible.
The connection is done with the supplied mating connector for
fastening cable strands. The polarity is as follows:
Figure 4: Connection for the power supply
at the lower right part of the front panel

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3Use
3.1 Safety Instructions
Attention! Danger due to electric shock! Risk of destroying the
measuring unit!
You may only measure temperatures on energized parts, when
these are not directly connected with the mains voltage (mea-
suring category CAT I). The measuring unit must not be used in
the measuring categories CAT II, CAT III, or CAT IV.
Never apply a voltage higher than 30 V between thermocouples
or between a thermocouple and earth.
Attention! Risk of burns!
At ambient temperatures of +70 °C (+158 °F) and above a pro-
tection against contact must be ensured for the measuring unit,
i.e. the surface may no longer be tangible.
3.2 Operation with Default Configuration
At delivery the measuring unit is provided with a default configura-
tion which allows you to start measuring and acquire the measuring
data via CAN instantly without further adaptations.
Tip: If you have advanced demands, you can reconfigure the
measuring unit (see chapter 4 on page 12).

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3.2.1 CAN Data
With the default configuration the measuring values of the eight
measuring channels are transmitted via CAN as follows:
Property Value
CAN IDs 100h, 101h
Data bytes 2 per measuring channel (8 per CAN message)
Contents per measuring channel 16-bit value: 16th °C
Data mode Intel (Little Endian) signed
CAN transfer rate 500 kBit/s
Transmission period 300 ms
Data byte
in ID 100h
Measuring
channel
1 - 2 1A
3 - 4 1B
5 - 6 2A
7 - 8 2B
Data byte
in ID 101h
Measuring
channel
1 - 2 3A
3 - 4 3B
5 - 6 4A
7 - 8 4B
3.2.2 Status LEDs
LED position The LED … Meaning
Thermocouple
socket
shines red An intact thermocouple is connected. If
despite an connected thermocouple the
corresponding LED should not shine, the
cable or the thermocouple may not be all
right.
Power supply
connector
blinks green (1 Hz) Normal operation of the microcontroller
unit
blinks green
quickly (2 Hz)
Missing configuration. Send a
configuration to the measuring unit via
CAN (see chapter 4 Configuring the
Measuring Unit on page 12).

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4Configuring the Measuring
Unit
If the default configuration for measuring data transmission as des-
cribed in section 3.2 doesn't fit your needs, you can configure the
measuring unit MU-TC1 CAN with Windows software via a CAN
connection.
Two kinds of configuring are possible:
Simple configuring with the program Thermocouple
Configuration
Advanced configuring (software available on request)
The possible settings are described in the corresponding sections.
4.1 Prerequisites for Configuring via CAN
The following prerequisites must be given, so that you can use a
configuration program:
Computer with Windows Vista, XP SP2, or 2000 SP4
CAN interface of the PCAN series for the computer (e.g. PCAN-
USB or PCAN-PCI)
Installed device driver for the CAN interface
CAN connection between the computer and the measuring unit

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4.2 Simple Configuring
With the help of the supplied Windows program Thermocouple
Configuration you can easily change the following settings regar-
ding the measuring data:
Block-wise assignment of CAN IDs to the measuring channels
1A to 2B and 3A to 4B
Transmission periods for both CAN IDs
Data type and format for each measuring channel
(signed/unsigned, Intel/Motorola)
Scaling of measuring values for each measuring channel (scale,
offset)
Similar options for the four measuring values of the reference
sensors in the measuring unit
4.2.1 Starting Thermocouple Configuration
The program doesn't require an extra installation and can directly
be started from the supplied CD.
Do the following to start Thermocouple Configuration:
1. Insert the supplied CD into the appropriate drive of the
computer.
2. The navigation program starts automatically after a short
moment. If not, start the program Intro.exe from the root
directory of the CD manually.
3. Under English > Tools > Thermocouple Configuration select
the command Start.
Alternatively, you can copy the contents of the CD directory
\Tools\Thermocouple to an arbitrary place of a local hard disk
and execute the program TConfig.exe there.

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4.2.2 Doing Simple Configuring
The program Thermocouple Configuration guides you through the
configuring procedure step by step. The created configuration may
not only be sent to the measuring unit but also saved on a data
carrier (CANdb format). Further more you can use a saved configu-
ration as basis for a new one, or send it without any changes to the
measuring unit.
4.3 Advanced Configuring
Some functions of the measuring unit may also be configured more
detailed. For example, you can apply hysteresis functions, characte-
ristic curves, and other simple as well as more complex conversion
and composition functions to the measuring values of the thermo-
couple inputs and the reference sensors. Further more there are
options for individually activating the LEDs and for adapting the
transmission parameters of the CAN bus to special applications.
The required software is not part of the delivery scope but available
on request (contact data:see on page 2).

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5Technical Specifications
Measuring modules
Supported thermocouple types
(IEC 584)
J (-210 - +1121 °C)
K (-200 - +1370 °C)
T (-200 - +400 °C)
(according to equipment)
Connectors Thermocouple socket with standard size (DIN EN
50212)
Reference sensors 4 (1 per measuring module having 2 sockets)
Measuring category CAT I (only electric circuits that are not
connected to the mains)
Measurement accuracy ±0,2 %
Accuracy of the reference
sensors
±0,5 K at +25 °C
±1 K at 0 - +70 °C
±2 K at -20 - +85 °C
±3 K at -40 - +125 °C
Controller module
Microcontroller Philips/NXP LPC2364
Temperature resolution at CAN
transmission
1/16 K
CAN
Specification ISO 11898-2
High-speed CAN (up to 1 MBit/s)
2.0A (standard format) and 2.0B (extended
format)
Transceiver NXP (Philips) TJA1040T
Connection D-Sub (m), 9 pins, pin assignment according to
CiA recommendation 102 DS
Optional 5-Volt supply at pin 1 for external
devices (e.g. bus converters), max. 100 mA
Galvanic isolation up to 500 V
Continued on the next page

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Supply
Supply voltage Nominal 12 V DC (6 - 34 V possible)
Current consumption ca. 100 mA at 12 V
Measures
Size
(incl. mounting plate and
connectors)
130 x 60 x 73 mm (5 1/8 x 2 3/8 x 2 7/8 inches)
(W x H x D)
See also dimension drawings, Appendix B on
page 18
Weight 420 g (14.8 oz.)
Environment
Operating temperature -40 – +85 °C (-40 – +185 °F)
Temperature for storage and
transport
-40 – +100 °C (-40 – +212 °F)
Relative humidity 15 – 90 %, not condensing
EMC DIN EN 61326-1
EC directive 2004/108/EG
Safety EN 61010-1 + Amendments 1 and 2

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Appendix A CE Certificate

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Appendix B Dimension Drawings
Figure 5: Front panel size
Figure 6: Mounting plate size
All data in millimeters (mm). The figures don't show the original size.