THOMSON Electrak MD Series User manual

Thomson Electrak®MD
Electric Linear Actuator
Installation Manual
Edition 2020-02
www.thomsonlinear.com

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-022
Version history
Edition Reason for revision
2020-02 First edition
Warranty
The Thomson Electrak®MD is warranted to be free from defects in materials and workmanship for a
period of twelve (12) months from date of delivery. The application of this product is the responsibility
of the buyer and Thomson makes no representation or warranty as to the suitability of the product for
any particular use or purpose. For a copy of the entire warranty for this product that is contained in our
standard terms and conditions of sale, please go to http://www.thomsonlinear.com/website/com/
eng/support/terms_and_conditions.php.
Disclaimer
Technical changes to improve the performance of the equipment may be made without prior notice!
All rights reserved. No part of this work may be reproduced in any form (by printing, photocopying,
microlm or any other method) or processed, copied or distributed by electronic means without the
written permission of Thomson.

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-02 3
Contents
1. General ...................................................................................................... 4
1.1 About this manual .................................................................................................. 4
1.2 Target group........................................................................................................... 4
1.3 Symbols used ........................................................................................................ 4
1.4 Transport and storage............................................................................................ 4
1.5 Packaging .............................................................................................................. 4
1.6 Disposal ................................................................................................................. 4
1.7 Support .................................................................................................................. 4
2. Safety......................................................................................................... 5
2.1 Safety notes........................................................................................................... 5
3. Standards.................................................................................................. 5
3.1 EC Declaration of conformity ................................................................................. 5
4. Installation ................................................................................................ 6
4.1 Product label.......................................................................................................... 6
4.2 Terminology ........................................................................................................... 6
4.3 Operation environment ......................................................................................... 6
4.4 Mechanical installation........................................................................................... 7
4.5 Electrical installation ............................................................................................ 10
4.6 Control options installation and operation............................................................ 12
5. CANBUS information ............................................................................. 20
5.1 Introduction to CANBUS SAE J1939 ................................................................... 20
5.2 CANBUS SAE J1939 communications protocol .................................................. 20
6. Troubleshooting ..................................................................................... 24
6.1 Troubleshooting ................................................................................................... 24
7. Technical specications ........................................................................ 25
7.1 Technical data...................................................................................................... 25
7.2 Ordering key ........................................................................................................ 26
Contents

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-024
1. General
1.1 About this manual
This manual contains mechanical and electrical installation instructions for the Thomson Electrak®MD
electric linear actuator. It also contains, among other things:
• technical data
• installation data
• type designation key.
It is important to carefully read this manual before installing the actuator and to have the correct
qualications needed to perform the installation.
1.2 Target group
This manual addresses qualied mechanical and electrical personnel.
1.3 Symbols used
This symbol is shown to highlight a general warning, general instruction or as a warning for a
mechanical hazard.
1.4 Transport and storage
The actuator may only be transported and stored in the original packaging supplied by Thomson. The
temperature during transportation and storage must be between -40 to +85° C (-40 to +185° F). Avoid
shocks to the package. If the package is damaged, check the actuator for visible damage and notify the
carrier, and if appropriate also Thomson.
1.5 Packaging
The packaging consists of a cardboard box. The box contains the actuator and this manual. For large
quantity orders bulk packaging may be used in which case the packaging and the content will vary
depending on the order agreement.
1.6 Disposal
Where required by law, used packaging and actuators are taken back by Thomson for professional
disposal if the transportation cost is paid by the sender. Please contact Thomson for shipping information.
1.7 Support
If technical support or information is needed for this product, please contact the nearest Thomson
Service Center. See the back of this manual. You can also visit www.thomsonlinear.com for information
on this product and how to contact us.

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-02 5
2. Safety
2.1 Safety notes
• Only properly qualied personnel are permitted to perform mechanical and electrical
installation of this product. Properly qualied personnel are familiar with mechanical or electrical
installation work and have the appropriate qualications for their job.
• Read this manual and any other available documentation before working on the equipment
that the actuator is or shall be a part of.
• Conform strictly to the information contained in this manual and on the actuator product label
on the actuator. Never exceed the performance limits stated herein.
• Never work on the actuator or its installation with the power on.
• Never unplug any cables or connectors during operation or with power on.
• Immediately stop using the actuator if it seems faulty or damaged in any way and notify an
appropriate person so that corrective actions can be taken.
• Never open the actuator as that will compromise the sealing and the function of the
actuator. There are no serviceable components inside.
• Grease may be present on the extension tube. Contact is non-hazardous. Film should not be
removed.
3. Standards
3.1 EC Declaration of incorporation of partly completed machinery
We, Thomson Linear
declare that this product corresponds with the International Standard ISO 13766:2006-05 2nd Edition
(Earth Moving Machinery, Electromagnetic Compatibility). The directive (MD) 2006/42/EC annex 2.1.B,
RoHSII directive 2011/65/EU, and that the standard EN ISO 12100:2010, Safety of machinery, have been
applied.
Thomson Electrak®MD Linear Actuator MDxxAxxx-xxxxxxxxxxxx
Product Description
Can be used when the machine or the system, which it shall be, a part of is in accordance with the
demands in the EEC Machinery Directive and/or other relevant regulations.
Kristianstad 2020-02-12
Date
Håkan Persson Business Unit Manager
Name Title Signature

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-026
4. Installation
4.1 Product label
The product label can be found on the side of the actuator.
It will tell you which model of actuator you have, its basic
performance data and where it is manufactured.
Please study the product label to determine actuator type
before starting any installation or service on the actuator.
If you need any assistance from Thomson, please provide
the serial number, manufacturing date and the designation
of the actuator(s) in question. You can also use the QR code
on the label to directly access Electrak MD information
on www.thomsonlinear.com.
4.2 Terminology
4.3 Operation environment
1. Operation temperature range is -40 to +85° Celsius (-40 to +185° Fahrenheit).
2. Protection degree against the ingress of water and particles is IP67 / IP69K.
3. Relative humidity range is 10 - 90 % non-condensing.
Min. -40° C (-40° F) Max. +85° C (+185° F) IP67 / IP69K
a. power cable b. housing c. cable connector cover plate
d. rear adapter e. product label f. cover tube
g. extension tube h. front adapter

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-02 7
4.4 Mechanical installation
4.4.1 General installation safety notes
• Never work on the actuator with the power switched on!
• Do not hold the extension tube while the unit is energized.
• Failure modes of the actuator should be considered to ensure it does not create harm.
4.4.2 Basic installation considerations
1. Only mount the actuator using the holes in the rear (a) and front (b) adapters. Check the model
number on the actuator product label (section 4.1) and then look at the ordering key (section 7.2)
to nd out your adapter type conguration.
2. Make sure that the actuator mounting position allows access to the cable connector cover plate (c), so
that it can be removed to allow access to the cable connector (section 4.4.4).

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-028
4.4.3 Mounting orientation and forces
1. The actuator can be mounted in any orientation and handle both pushing and pulling loads.
2. Always install actuator so that the force of the load acts in the center of the extension tube and the
rear adapter.
3. Only mount the actuator to the rear and front adapter mounting holes.
4. Only use solid mounting pins and support them at both ends.
5. The mounting pins must be parallel to each other both radially and axially.
4.4.4 Cable connector cover plate
1. The cover plate is held in place by a screw (M2.5 with Torx T8 head) that can be accessed through
the hole in the top of the cover plate (a). Keep in mind to mount the actuator so that there is enough
clearance to access the screw with a tool!
2. Once the cover plate is released it needs to be pushed about 20 mm (0.8 inch) in the direction of
the arrow symbol on the cover plate before it can be removed from the actuator (b). The connectors
are a part of the backside of the cover plate and can be accessed once the cover plate is removed.
3. Make sure to put the cover plate back correctly and torque the screw to 0.45 Nm (4 in-lb) to ensure
that the actuator cover plate and connectors are properly sealed.
YES NO

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-02 9
4.5 Electrical installation
4.5.1 General notes
• Make sure the leads/cables leading to the motor can handle the maximum motor current.
• An emergency stop is recommended to reduce the chance of a crushing hazard.
• Never work on the actuator or the wiring with the power switched on!
4.5.2 Fuse size
Protect the actuator and the wiring by using a slow blow fuse between the actuator and the power source.
4.5.3 Electrical connections
The actuator is supplied with a cable (a) to which all connections are done. The cable has ying leads in
one end for customer connections. In the other end the cable is integrated in to the cable connector cover
plate (b) (section 4.4.4). The plug in connector allows replacing the actuator without disconnecting the ying
leads.
4.5.4 Lead cross sections
To avoid malfunction due to voltage drop the cross section of the leads between the actuator power
leads and the power source must be of su󰀩cient size. For longer cables than stated in the table,
calculations based on the supply voltage, the current draw, the length of the cables and the ambient
temperature must be done.
Power Lead Cross Sections
Length of cable (L) Min. allowed cross section (X)
0 - 3 m 1.5 mm2[AWG 16]
3 - 6 m 2.5 mm2[AWG 14]
Recommended Fuse Size
Actuator supply voltage Fuse size
12 VDC 10 A
24 VDC 5 A
Power leads
0.75 mm2[AWG 18]
Cable
X
Signal leads
0.35 mm2[AWG 22]

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-0210
4.5.5 Inrush current
At the start of the actuator there is an inrush current to the motor that will last between 75 to 150
milliseconds. See below table to determine the inrush current for the control option being used.
If using an AC powered power supply it must be sized to handle the inrush current (batteries
typically have no problem delivering the inrush current). Also contacts, switches and relays must
be sized appropriately to be able to handle the inrush current.
Control Option Inrush Current Level
Option Inrush current
EXX, ELX, EXP up to 4 × rated current for the actuator model and load in question
XXX, XXP, LXX, LLX, LXP, LLP, CNO up to 2 × rated current for the actuator model and load in question

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-02 11
4.6.1 General notes
• Avoid placing signal cables along power cables to reduce the risk of interference.
• Do not use vehicle earth as the return conductor. Instead use a two wire system to reduce
the risk of interference.
• In very sensitive applications or where there is a risk of interference we recommend using
shielded signal cables.
• Keep in mind that long cables in combination with small lead cross sections and low voltages
may lead to undervoltage and malfunction due to voltage drop.
• Relays or other coil operated devices should have spark protection to avoid interference.
• Never work on the actuator or the wiring with the power switched on!
4.6.2 Speed control by adjusting the input voltage
Only Electrak MD actuators equipped with control option XXX or XXP can be speed controlled
adjusting the input voltage (including by means of Pulse Width Modulation (PWM)). All other
control options cannot. Instead, depending on type of control and voltage adjustment method
attempted to use, the control will either keep the speed, stop or be permanently damaged and
cause malfunction.
4.6.3 How to determine the control option
Electrak MD is equipped with one of the control options in the table below. To determine the option
your actuator has, check the model number on the product label on the actuator (section 4.1) and then
check the ordering key (section 7.2). Use the table below and go to the corresponding section for further
information.
4.6 Control options installation and operation
Control Options
Option Functions Section
XXX Internal End-of-Stroke Limit Switches 4.6.4
XXP Internal End-of-Stroke Limit Switches + Analog Position Output 4.6.5
EXX Electrak Monitoring Package 4.6.6
EXP Electrak Monitoring Package + Analog Position Output 4.6.7
LXX Electrak Monitoring Package + Low Level Signal Motor Switching 4.6.8
LLX Electrak Monitoring Package + Low Level Signal Motor Switching + End of Stroke Indication Output 4.6.9
LXP Electrak Monitoring Package + Low Level Signal Motor Switching + Analog Position Output 4.6.10
LLP Electrak Monitoring Package + Low Level Signal Motor Switching + End of Stroke Indication Output +
Analog Position Output 4.6.11
CNO CAN Bus J1939 Control + Open Loop Speed Control 4.6.12

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-0212
4.6.4 Control option XXX
Utilizing the internal control system the actuator will:
• Stop the actuator immeditately at each end of mechanical travel.
To extend the actuator apply +Vdc to red and -Vdc to black. To retract apply -Vdc to red and +Vdc to black.
4.6.5 Control option XXP
Control option XXP works as option XXX (section 4.6.4) but also has an analog (potentiometer) output
that will provide feedback on the extension tube position.
To extend the actuator apply +Vdc to red and -Vdc to black. To retract apply -Vdc to black and +Vdc to red.
red
black
not used
white
blue
orange
violet
brown
grey
red/white
black/white
XXX Control Option Specications
Input voltage
MD12
MD24
[Vdc]
9 - 16
18 - 32
Max. actuator current draw [A] see product label
F Fuse
S1 Double pole double throw switch
F Fuse
S1 Double pole double throw switch
not used
+ Vdc
- Vdc
potentiometer output
red
black
white
blue
orange
violet
brown
grey
red/white
black/white
XXP Control Option Specications
Input voltage
HD12
HD24
[Vdc]
9 - 16
18 - 32
Max. actuator current draw [A] see product label
Potentiometer type wirewound
Potentiometer max.
input voltage
[Vdc] 32
Potentiometer max.
power
[W] 1
Potentiometer linearity [%] ± 0.25
Potentiometer output
resolution
[ohm/mm]
MDxxA025, all strokes
MDxxA100, all strokes
MDxxA050, 50 - 250 mm stroke
MDxxA200, 50 - 250 mm stroke
MDxxA050, 300 mm stroke
MDxxA200, 300 mm stroke
16.67
16.67
33.33
33.33
16.67
16.67

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-02 13
not used
4.6.6 Control option EXX
Utilizing the internal control system the actuator will:
• Stop the actuator immeditately at each end of mechanical travel and throughout the stroke anytime
current exceeds a factory preset value for the rated load (over load condition). This value is adjusted
during operation automatically to provide consistent force. Resetting the actuator requires motion in
opposite direction to continue normal operation.
• Stop the actuator when the current move is nished in the situation where voltage or temperature
are outside their normal operating ranges. Once within the normal operating range the actuator will
automatically reset and normal operation can be continued.
Always turn power o󰀨 to the actuator before working on it to eleminate the risk of the actuator
making unplanned moves after it has carried out the automatic reset.
To extend the actuator apply +Vdc to red and -Vdc to black. To retract apply -Vdc to red and +Vdc to black.
EXX Control Option Specications
Input voltage
MD12
MD24
[Vdc]
9 - 16
18 - 32
Max. actuator current draw [A] see product label
F Fuse
S1 Double pole double throw switch
red
black
white
blue
orange
violet
brown
grey
red/white
black/white

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-0214
4.6.7 Control option EXP
In addition to all of the features included in the EXX version (section 4.6.46, the EXP adds a
potentiomenter providing a voltage signal for the customer to use to determine position, speed and
direction.
To extend the actuator apply +Vdc to red and -Vdc to black. To retract apply -Vdc to red and +Vdc to black.
EXP Control Option Specications
Input voltage
MD12
MD24
[Vdc]
9 - 16
18 - 32
Max. actuator current draw [A] see product label
Potentiometer type wirewound
Potentiometer max.
input voltage
[Vdc] 32
Potentiometer max.
power
[W] 1
Potentiometer linearity [%] ± 0.25
Potentiometer output
resolution
[ohm/mm]
MDxxA025, all strokes
MDxxA100, all strokes
MDxxA050, 50 - 250 mm stroke
MDxxA200, 50 - 250 mm stroke
MDxxA050, 300 mm stroke
MDxxA200, 300 mm stroke
16.67
16.67
33.33
33.33
16.67
16.67 F Fuse
S1 Double pole double throw switch
not used
+ Vdc
- Vdc
potentiometer output
red
black
white
blue
orange
violet
brown
grey
red/white
black/white

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-02 15
4.6.8 Control option LXX
In addition to all of the features included in the EXX version (section 4.6.6), the LXX option allows the
end user to extend, retract or stop the actuator using low current (<22 mA) input signals instead of
switching the polarity of the input power voltage.
It also includes:
• An automatic soft start capability reducing the inrush current (section 4.5.5).
• A “sleep” mode function is activated when no motion is commanded for 15 seconds. In sleep mode
the current draw is less than 1 mA for a 12 Vdc actuator and less the 2 mA for a 24 Vdc actuator. The
sleep mode will exit and return to normal operation when the next move command is received.
• Dynamic braking throughout the entire stroke length whenever a motion command is removed.
Power the actuator by connecting red to + Vdc and black to - Vdc in the power cable. To extend the
actuator apply +Vdc to violet and to retract apply +Vdc to orange in the signal cable while applying -Vdc
to grey.
LXX Control Option Specications
Input voltage
MD12
MD24
[Vdc]
9 - 16
18 - 32
Max. actuator current draw [A] see product label
Extend / retract input voltage [Vdc] 9 - 32
Extend / retract input current [mA] 6 - 22
F Fuse
S1 Extend switch
S2 Retract switch
not used
not used
not used
- Vdc
red
black
white
blue
orange
violet
brown
grey
red/white
black/white
ext/ret + Vdc

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-0216
4.6.9 Control option LLX
In addition to all of the features included in the LXX version (section 4.6.8), LLX also includes end of
stroke indication. These outputs can be used to provide feedback that the actuator has reached it’s
mechanical minimum or maximum stroke.
Since these outputs are current sinking open collector type of outputs, they will each require an external
pull-up resistor to operate e󰀨ectively.
Power the actuator by connecting red to + Vdc and black to - Vdc in the power cable. To extend the
actuator apply +Vdc to violet and to retract apply +Vdc to orange in the signal cable while applying -Vdc
to grey.
F Fuse
S1 Extend switch
S2 Retract switch
R1 Pull-up resistor
R2 Pull-up resistor
LLX Control Option Specications
Input voltage
MD12
MD24
[Vdc]
9 - 16
18 - 32
Max. actuator current draw [A] see product label
Extend / retract input voltage [Vdc] 9 - 32
Extend / retract input current [mA] 6 - 22
End-of-stroke output type open collector
End-of-stroke output max. [Vdc]
voltage
32
End-of-stroke output max. [mA]
current
25
not used
fully extended
indication output
fully retracted
indication output
not used
- Vdc
red
black
white
blue
orange
violet
brown
grey
red/white
black/white
ext/ret + Vdc

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-02 17
4.6.10 Control option LXP
In addition to all of the features included in the LXX version (section 4.6.8), LXP also includes a
potentiometer providing a voltage signal for the customer to use to determine position, speed and
direction.
Power the actuator by connecting red to + Vdc and black to - Vdc in the power cable. To extend the
actuator apply +Vdc to violet and to retract apply +Vdc to orange in the signal cable while applying -Vdc
to grey.
F Fuse
S1 Extend switch
S2 Retract switch
LXP Control Option Specications
Input voltage
MD12
MD24
[Vdc]
9 - 16
18 - 32
Max. actuator current draw [A] see product label
Potentiometer type wirewound
Potentiometer max.
input voltage
[Vdc] 32
Potentiometer max.
power
[W] 1
Potentiometer linearity [%] ± 0.25
Potentiometer output
resolution
[ohm/mm]
MDxxA025, all strokes
MDxxA100, all strokes
MDxxA050, 50 - 250 mm stroke
MDxxA200, 50 - 250 mm stroke
MDxxA050, 300 mm stroke
MDxxA200, 300 mm stroke
16.67
16.67
33.33
33.33
16.67
16.67
Extend / retract input voltage [Vdc] 9 - 32
Extend / retract input current [mA] 6 - 22
not used
not used
ext/ret + Vdc
- Vdc
pot. + Vdc
pot. - Vdc
pot. output
red
black
white
blue
orange
violet
brown
grey
red/white
black/white

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-0218
4.6.11 Control option LLP
In addition to all of the features included in the LLX version (section 4.6.9), LXP also includes a
potentiometer providing a voltage signal for the customer to use to determine position, speed and
direction.
The end-of-stroke indication ouputs are current sinking open collector type of outputs, they will each
require an external pull-up resistor to operate e󰀨ectively.
Power the actuator by connecting red to + Vdc and black to - Vdc in the power cable. To extend the
actuator apply +Vdc to violet and to retract apply +Vdc to orange in the signal cable while applying - Vdc
to grey.
LLP Control Option Specications
Input voltage
MD12
MD24
[Vdc]
9 - 16
18 - 32
Max. actuator current draw [A] see product label
Potentiometer type wirewound
Potentiometer max.
input voltage
[Vdc] 32
Potentiometer max.
power
[W] 1
Potentiometer linearity [%] ± 0.25
Potentiometer output
resolution
[ohm/mm]
MDxxA025, all strokes
MDxxA100, all strokes
MDxxA050, 50 - 250 mm stroke
MDxxA200, 50 - 250 mm stroke
MDxxA050, 300 mm stroke
MDxxA200, 300 mm stroke
16.67
16.67
33.33
33.33
16.67
16.67
Extend / retract input voltage [Vdc] 9 - 32
Extend / retract input current [mA] 6 - 22
End-of-stroke output type open collector
End-of-stroke output max. [Vdc]
voltage
32
End-of-stroke output max. [mA]
current
25
ext/ret + Vdc
- Vdc
pot. + Vdc
pot. - Vdc
pot. output
red
black
white
blue
orange
violet
brown
grey
red/white
black/white
F Fuse
S1 Extend switch
S2 Retract switch
R1 Pull-up resistor
R2 Pull-up resistor
fully extended
indication output
fully retracted
indication output

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-02 19
CAN CAN Bus device in actuator or other equipment
R Resistor
4.6.12 Control option CNO
This document assumes the reader is familiar with the SAE J1939 standard. Terminology
from the standard is used, but not described in detail. See section 5 for information on the
CAN Bus operation and communication protocol.
4.6.12.1 General installation data
Voltage is to be directly connected to the actuator. All motion and protection on the CAN Bus option is
handled through the CAN messages including overload protection. Please see section 5 for more details
on the messages. The actuator can also be manually forced to extend by applying + Vdc to pin 6 (violet
wire) and to retract by by applying + Vdc to pin 5 (orange wire). When this is done the actuator will move
with its maximum allowed settings.
4.6.12.2 CAN Bus SAE J1939 installation data
Follow wiring guidelines per ISO-11898 Standard CAN 2.0B, Protocol SAE J1939. Proper termination
resistors (120 Ohm) should be placed in mating wire harness, see below. Please refer to section 5 for
more communication details.
CNO Control Option Specications
Input voltage
MD12
MD24
[Vdc]
9 - 16
18 - 32
Max. actuator current draw [A] see product label
Forced extension / retraction
input voltage
[Vdc] 9 - 32
Forced extension / retraction
input current
[mA] 6 -22
F Fuse
S1 Manual retraction switch (optional)
S2 Manual extension switch (optional)
CAN high
CAN low
address select 3
address select 1
address select 2
+ Vdc
- Vdc
red
black
white
blue
orange
violet
brown
grey
red/white
black/white

Thomson
Thomson Electrak®MD Actuator - Installation Manual - 2020-0220
5. CAN Bus information
5.1 Introduction to CANBUS SAE J1939
This document assumes the reader is familiar with the SAE J1939 standard. Terminology from the
standard is used, but not described in detail. The Electrak®MD actuator is compliant with the standard
J1939, and supports the following PGNs (Parameter Group Number) from the standard.
J1939-21 – Data Link Layer
• Proprietary A 61184 (0x00EF00)
• Proprietary A2 126720 (0x01EF00)
J1939-81 – Network Management
• Address Claimed/Cannot Claim 60928 (0x00EE00)
• Commanded Address 65240 (0x00FED8)
5.2 CANBUS SAE J1939 communications protocol
5.2.1 J1939 NAME
The Electrak MD has the following defaults for the J1939 NAME. Please refer to the SAE J1939/81
standard for more information on these parameters.
5.2.2 Address
The Electrak MD uses a default address value of 27 (0x1B). In applications where the default address is
not available, there are three additional methods in choosing a new address.
1. The Electrak MD device is arbitrary address capable, if another device with a higher priority NAME
contends for the selected address, the actuator will continue to request other addresses until it nds
one that it can claim.
2. The Electrak MD device can also use the commanded address PGN to select a specied address.
See J1939/81 for more details about address claiming.
3. In some applications it may be more convenient to select an address through hardware switches.
Activate the desired address select input by connecting it to positive and address select common
to negative. This allows the user to change the default address using the address select inputs
as dened in section 4.6.12. Activating individual select pins will create a binary adder to the default
address. This method can allow up to 8 individual actuator addresses on a single bus. The below
chart shows some examples on how this can be implemented. Note that conicting messages
produce arbitrary execution.
J1939 NAME Defaults
Arbitrary Address Capable Yes
Industry Group 0, Global
Vehicle System Instance 0
Vehicle System 0, Non-specic system
Function 255, Not available
ECU Instance 0, First instance
Manufacture Code 547, Thomson Linear LLC
Identity Number 1
Address Select
Address select common Address select 3 Address select 2 Address select 1 Binary adder Default address
Gnd 0 0 0 0 27 (0x1B)
Gnd 0 0 1 1 28 (0x1C)
Gnd 0 1 0 2 29(0x1D)
...
Gnd 1 1 1 7 34(0x22)