Linak LA12 User manual

LINAK.COM/TECHLINE
Actuator LA12
User manual

Page 2 of 36
Contents
Preface ................................................................................................................................................. 4
LINAK application policy........................................................................................................................ 5
Chapter 1
Safety instructions.............................................................................................................................. 6-7
Chapter 2
Mounting guidelines........................................................................................................................... 8-9
Electrical installation:........................................................................................................................... 10
Recommended fuse................................................................................................................... 10
Actuator without feedback........................................................................................................ 11
Actuator with:
Absolute positioning - Mechanical potentiometer feedback ............................................. 12
Absolute positioinng - Analogue feedback....................................................................... 13
Reed - Relative positioning 4 wires ................................................................................. 14
Reed - Relative positioning 3 wires ................................................................................. 15
IC (no EOS out).......................................................................................................... 16-17
IC and endstop signals............................................................................................... 18-20
Correct wiring of Power GND and Signal GND........................................................................... 21

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Contents
Chapter 3
Troubleshooting ............................................................................................................................. 22-23
Chapter 4
Specifications...................................................................................................................................... 24
Usage ................................................................................................................................................. 24
Actuator dimensions............................................................................................................................ 25
Speed and current curves:............................................................................................................... 26-27
12V motor................................................................................................................................... 26
24V motor................................................................................................................................... 27
Test of conducted and radiated emission (EMC) ................................................................................... 28
Label for LA12 .................................................................................................................................... 29
Key to symbols .................................................................................................................................... 29
LA12 Ordering example....................................................................................................................... 30
Chapter 5
Maintenance....................................................................................................................................... 31
Repair................................................................................................................................................. 31
Main groups of disposal ...................................................................................................................... 31
Warranty ............................................................................................................................................ 32
Declaration of conformity .................................................................................................................... 33
Declaration of incorporation of partly completed machinery.................................................................. 34
Addresses ........................................................................................................................................... 36

Page 4 of 36
Preface
Dear User,
We are delighted that you have chosen a product from LINAK®.
LINAK systems are high-tech products based on many years of experience in the manufacture and development
of actuators, electric control boxes, controls, and chargers.
This user manual does not address the end-user, but is intended as a source of information for the manufacturer
of the equipment or system only, and it will tell you how to install, use and maintain your LINAK electronics. It
is the responsibility of the manufacturer of the end-use product to provide a User Manual where relevant safety
information from this manual is passed on to the end-user.
We are sure that your LINAK product/system will give you many years of problem-free operation. Before our
products leave the factory they undergo full function and quality testing. Should you nevertheless experience
problems with your LINAK product/system, you are always welcome to contact your local dealer. LINAK
subsidiaries and some distributors situated all over the world have authorised service centres, which are always
ready to help you.
LINAK provides a warranty on all its products. This warranty, however, is subject to correct use in accordance with
the specifications, maintenance being done correctly and any repairs being carried out at a service centre, which
is authorised to repair LINAK products.
Changes in installation and use of LINAK products/systems can affect their operation and durability. The products
are not to be opened by unauthorised personnel.
The User Manual has been written based on our present technical knowledge. We are constantly working on
updating the information and we therefore reserve the right to carry out technical modifications.
LINAK A/S

Page 5 of 36
LINAK application policy
The purpose of the application policy is to define areas of responsibilities in relation to applying a LINAK product
defined as hardware, software, technical advice, etc. related to an existing or a new customer application.
LINAK products as defined above are applicable for a wide range of applications within Medical, Furniture, Desk,
and Industry areas.Yet, LINAK cannot know all the conditions under which LINAK products will be installed, used,
and operated, as each individual application is unique.
The suitability and functionality of the LINAK product and its performance under varying conditions (application,
vibration, load, humidity, temperature, frequency, etc.) can only be verified by testing, and shall ultimately be the
responsibility of the LINAK customer using any LINAK product.
LINAK shall be responsible solely that LINAK products comply with the specifications set out by LINAK and it
shall be the responsibility of the LINAK customer to ensure that the specific LINAK product can be used for the
application in question.

Page 6 of 36
Chapter 1
Safety instructions
Please read this safety information carefully:
Be aware of the following three symbols throughout the user manual:
Warning!
Failing to follow these instructions can cause accidents resulting in serious personal injury.
Recommendations
Failing to follow these instructions can result in the actuator suffering damage or being ruined.
Additional information
Usage tips or additional information that is important in connection with the use of the actuator.
Furthermore, ensure that all staff who are to connect, mount, or use the actuator are in possession of the necessary
information and that they have access to this user manual.
Persons who do not have the necessary experience or knowledge of the product/products must not use the
product/products. Besides, persons with reduced physical or mental abilities must not use the product/products,
unless they are under surveillance or they have been thoroughly instructed in the use of the apparatus by a person
who is responsible for the safety of these persons.
Moreover, children must be under surveillance to ensure that they do not play with the product.
Before you start mounting/dismounting, ensure that the following points are observed:
• The actuator is not in operation.
• The actuator is free from loads that could be released during this work.
Before you put the actuator into operation, check the following:
• The actuator is correctly mounted as indicated in the relevant user instructions.
• The equipment can be freely moved over the actuator’s whole working area.
• The actuator is connected to a mains electricity supply/transformer with the correct voltage and which is
dimensioned and adapted to the actuator in question.
• Ensure that the voltage applied matches to the voltage specified on the actuator label.
• Ensure that the connection bolts can withstand the wear.
• Ensure that the connection bolts are secured safely.

Page 7 of 36
During operation, please be aware of the following:
• Listen for unusual sounds and watch out for uneven running. Stop the actuator immediately if anything
unusual is observed.
• Do not sideload the actuator.
• Only use the actuator within the specified working limits.
• Do not step or kick on the actuator.
When the equipment is not in use:
• Switch off the mains supply in order to prevent unintentional operation.
• Check regularly for extraordinary wear.
Classification
The equipment is not suitable for use in the presence of a flammable anaesthetic mixture with air or with oxygen
or nitrous oxide.
Warnings
• Do not sideload the actuator.
• When mounting the actuator in the application ensure that the bolts can withstand the wear and that they
are secured safely.
• If irregularities are observed, the actuator must be replaced.
• For actuators with a stroke length below 130mm, the extended position of the mechanical endstop will
always be at 130mm. That means, if an actuator has a stroke of 80mm and the endstop switch in outwards
direction fails, the actuator will travel additional 50mm before reaching mechanical endstop.
Recommendations
• Do not place load on the actuator housing and do prevent impact or blows, or any other form of stress to
the housing.
• Ensure that the cable cover is mounted correctly. Use 1.5Nm torque.
• Ensure that the duty cycle and the usage temperatures for LA12 actuators are respected.
• Ensure that the cable cannot be squeezed, pulled or subjected to any other stress.
• Furthermore, it will be good practice to ensure that the actuator is fully retracted in the ”normal” position.
The reason is that there will be a vacuum inside the actuator if it is extended which over time can lead to
water entering the actuator.
• If the actuator (without integrated controller) is mounted in an application where a mechanical stop prevents
the endstop switches in the actuator from being activated, the actuator must be equipped with an electrical
safety device (current monitoring) or external limit switch.
• The cable should not be used for carrying the actuator.
• We recommend to take some precaution and design the wire connection in a way, where the cable end is kept
inside a closed, protected area to guarantee the high IP protection.

Page 8 of 36
Chapter 2
Mounting guidelines
LINAK®linear actuators are quickly and easily mounted by slipping pins through the holes on each end of the units
and into brackets on the machine frame and the load.
Figure 2
Right WrongWrong Wrong
Figure 1
The mounting pins must be parallel to each other as
shown in Figure 1. Pins, which are not parallel to each
other, may cause the actuator to bend and be damaged.
The load should act along the stroke axis of the actuator
as off-centre loads may cause bending and lead to
premature failure. See Figure 2.
Make sure the mounting pins are supported in both ends.
Failure to do so could shorten the life of the actuator.Also,
avoid applying a skew load on the actuator.
The actuator can rotate around the pivot point in the front and rear end. If this is the case it is of high importance
that the actuator is able to move freely over the full stroke length,both during the development and daily operation.
Please pay special attention to the area around the housing where parts can be trapped and cause damage to the
application and actuator.
In applications with high dynamic forces LINAK recommends not to use the fully extended or retracted position
over longer time, as this can damage the endstop system permanently.

Page 9 of 36
Mounting guidelines
• The mounting pins must have the correct dimension.
• The bolts and nuts must be made of a high quality steel grade (e.g. 10.8).
No thread on the bolt inside the back fixture or the piston rod eye.
• Bolts and nuts must be protected so there is no risk for them to fall out.
• Do not use a torque that is too high when mounting the bolts for the back fixture or he piston rod
eye.This will stress the fixtures.
Please note:
The piston rod eye is only allowed to turn 0-90 degrees.
Instruction concerning the turning of the piston rod eye and inner tube:
• When mounting and taking into use, it is not permitted to make excessive turns of the piston rod
eye. In cases where the eye is not positioned correctly, it is permitted to first screw the eye down to
its bottom position, at a maximum torque of 2Nm (1), and thereafter a maximum 90 degrees turn
outwards again (2).
• As the piston rod eye can turn freely, it is important to ensure that the eye cannot rotate if the
actuator is used in a pull application. If this happens, the actuator will be pulled apart and destroyed.
030618/DS
Instruktion vedr. uddrejning af inderrør – LA27 + LA27C
Til salesbackup, brugsanvisning og datablad.
Ved montage og ibrugtagning, er det ikke tilladt at dreje unødvendigt mange gange på
stempelstangsrøret. Hvis øjet ikke er positioneret korrekt, er det tilladt først at skrue
røret i bund (1), og derefter skrue det maksimalt ½ omgang ud igen (2).
Warning!
If the actuator is used for pull in an application where personal injury can occur, the
following is valid:
It is the application manufacturer’s responsibility to incorporate a suitable safety arrangement, which
will prevent personal injury from occurring, if the actuator should fail.
Warning!
LINAK’s actuators are not designed for use within the following fields:
• Offshore installations • Explosive environments
• Aeroplanes and other aircraft • Nuclear power generation

Page 10 of 36
Electrical installation
Recommended fuse for actuators without integrated controller
• To ensure maximum self-locking ability, please be sure that the motor is shorted when stopped.
Actuators with integrated controller provide this feature, as long as the actuator is powered.
• When using soft stop on a DC-motor, a short peak of higher voltage will be sent back towards the
power supply. It is important when selecting the power supply that it does not turn off the output,
when this backwards load dump occurs.
The power supply for actuators without integrated controller must be monitored externally and cut off
in case of current overload.
Type Spindle Pitch
(mm)
Thrust max.
Push/Pull
(N)
Typical Amp.
at full load
(A)
24V - 12V
Recommended
fuse
24V - 12V
12xx00-1xxx12xx 2 750 -4.6 -9.2
12xx00-1xxx24xx 2 750 2.2 -4.4 -
12xx00-2xxx12xx 4 300 - 2.5 - 5.0
12xx00-2xxx24xx 4 300 1.5 - 3.0 -
12xx00-3xxx12xx 6 200 - 2.2 - 4.4
12xx00-3xxx24xx 6 200 1.0 - 2.0 -