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11. LA34 (MEDLINE
CARELINE
®
Options:
• Mechanical spline: When using the actuator in a vertical position, the force needed to activate the mechanical spline is maximum 60 N + the
weight of the application . To reengage the spline function, a force of maximum 60 N is needed . Same installation dim . as standard actuator .
• A modified Bowden cable holder is available (as a special article), with better cable alignment and improved guidance of the cables .
• Electric spline: When using the actuator in a vertical position, the force needed to activate the electric spline is maximum 100 N + the weight of
the application . To reengage the spline function, a force of maximum 100 N is needed .
Usage
• Duty cycle:
2/18 – 2 minutes continuous use followed by 18 minutes not in use
• Ambient temperature:
+ 5 °C to + 40 °C
• Compatibility:
Compatible with LINAK control boxes . Please contact LINAK
• Approvals:
IEC60601-1, ANSI / AAMI ES60601-1 and CAN / CSA-22 .2 No 60601-1 for LA34 24V zinc and composite versions .
Recommendations
• Power supply without current cut-off can cause serious damage to the actuator if mechanical stop is encountered or the actuator movement is
blocked in another way .
• LINAK control boxes are designed so that they will short-circuit the motor terminals (poles) of the actuator(s) when the actuator(s) are not running .
This solution gives the actuator(s) a higher self-locking ability . If the actuator(s) are not connected to a LINAK control box the terminals of the motor
must be short-circuited to achieve the self-locking ability of the actuator .
Warning
An LA34 actuator is not designed for repeated dynamic push-to-pull movements . This cause extra strain to the actuator and can give safety
considerations, the consequence being possible damage to the actuator . Therefore, if repeated dynamic push-to-pull movements are essential
for the application, perform tests to validate the performance and use a steel piston rod eye (contact LINAK A/S) .
LA34 actuators for patient hoists are marked with a label to ensure the user is aware that it is not permitted to handle the patient hoist by
pulling the actuator or otherwise expose it to side forces .
Tests show that uneven running can occur when retracting the LA34 composite actuator with a low load below 500N .
This has no impact on the safety of the actuator and is caused by internal frictions .
If the LA34 actuator is used in connection with a non-LINAK power supply the system must be equipped with current trip cut-off .
Adjustment of the installation dimension N
As standard the installation dimension on the LA34 actuator can be manually adjusted by +4 / -0 mm (not possible for mechanical splines) . The
adjustment of the installation dimension must only be made without use of tools only, or hand) . It is not allowed to use tools to adjust the installation
dimension of the LA34 actuator as there is a risk that the inner tube may be unscrewed .
Hall
The Hall principle is very similar to the Reed principle . It is a control box, which based on Hall signals, can decide whether the actuator runs out or in .
Hall, however, can detect whether the actuator runs in or out . The number of pulses is like Reed . Hall and Reed are placed opposite the potentiometer
on the actuator's worm wheel . Therefore, it is not suitable for use in quick release /free wheelingactuators . see figure 10 .
)
®
LA34 is a technological state-of-the-art actuator that, due to its innovative construction
can push up to 10,000 N at a speed of 5 mm/sec . and with a current consumption of
approx . 7 Amp . The strong LA34 actuator is made in a low weight composite material .
Its compact design, the outstanding performance and a wide range of safety options
makes LA34 the right choice for a variety of medical and industrial applications .
The LA34 24V actuator is approved according to IEC 60601-1, ANSI / AAMI ES60601-1,
and CAN / CSA-22 .2 No 60601-1 .
Reed-switch:
The Reed-switch gives a number of pulses for each rotation of the motor . These pulses are
used to calculate the piston rod's position as well as to control several actuators running
in parallel .
Your nearest LINAK dealer can inform the number of pulses per stroke length .
Regarding Reed-switch connection, see Figure 6.10 .
Page 65 of 295
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