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Electrical linear actuators

Electro-mechanical linear actuators for linear adjusting procedures in automotive engineering, industrial technology, medical engineering as well as agro-industry

voltage supply: 12 or 24 VDC

max. lifting force: 300 to 6000 N
stroke: 100 up to 600 mm
protection class: IP66 or IP69K

Series Data sheet Technical data
L1.101
L1.101
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L1.101 Linear actuators RA 600

 

max. lifting force 1000 to 6000 N

stroke from 100 to 600 mm

version with limit switches or stroke measuring system

max. push force: 1000 .. 6000 N
max. pull force: 80% of the push force
stroke: 100 up to 600 mm
max. duty cycle: 15%
code class: IP66 or IP69K
voltage: 24 VDC
connection: 2 fork eyes Ø 12 mm

L4.202
L4.202
 
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L4.202 Linear actuators RA 60 K

 

Max. lifting force 300 to 600 N

stroke from 100 to 200 mm

version with limit switches or stroke measuring system

max. push force: 300 .. 600 N
max. pull force: 100% of the push force
stroke: 100 up to 200 mm
max. duty cycle: 15%
code class: IP69K
voltage: 12 VDC
connection: 2 fork eyes Ø 10 mm

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figure 1: Linear actuator RA 600










































































 
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figure 2: Linear Actuator RA 60 K
 

RA linear actuators

RA linear actuators are used for electrically-operated adjustments and as actuating elements in applications with control-oriented demands in short-time service.

Linear actuators RA 600 (figure 1)

Description
Linear actuators RA 600 consist of a 24 VDC direct current drive, whose drive energy is transferred over a snail transmission and a spindle stroke transmission to the pushing rod.
The self-locking spindle lifting gear stops the actuator in case of power failure and maintains it safely in the reached position.
Features of the sturdy design are the generous dimensioning of the actuator and the solid design of the housing.
As an alternative to the code class IP 66 also a press and splash water protection as per code class IP 69K is available.
Linear actuators RA600 are protected against corrosion and function without any troubles also in rough operating and environmental conditions. Since they are maintenance-free, this is permanently guaranteed.

The version with limit switches is equipped with 2 sensors, that prevent an unintentional movement to the mechanical stroke ends and thus the overload of the mechanics.
The version with stroke measuring system allows the realisation of control-oriented applications and the operation of several linear actuators in synchronism. The stroke ends are freely definable by means of the digital signal.

Operation
Linear actuators RA 600 can optionally be operated by hand panel or foot switch and supply units of the accessory programme as per data sheet M8.200 with touch control or by an external control with 24 V output.
The version with stroke measuring system delivers the user incremental signals of the stroke measuring system.

Version with limit switches
The version with limit switches has 2 integrated Hall-effect sensors, which automatically switch off the motor brake as soon as the upper or lower stroke end position is obtained. This guarantees that the linear actuator does not mechanically push against the stop. At the plug-type connector of this version the pins 3 and 4 have to be connected to 24 VDC. By changing the polarity, switching over from retracting to extending is effected.

Version with stroke measuring system
The stroke of linear actuators is transmitted by potential-free square wave signals, which are generated by the rotating spindle, to an external control. An additional reference point, that initialises the stroke measuring system, is in the retracted stroke end position. This reference point can also be used to switch off the retracted stroke end position.
With the incremental stroke measuring system control-oriented applications and the compound of several linear actuators in synchronism can be realised. Due to the incremental acquisition of the position, faults of linearity are excluded.
Supply units as per page M8.200 treat the actuators and the user's connecting construction with care due to a special control and thus contribute to the increase of the service life.

Material
body: polyamide, black, glass fibre reinforced
guiding tube: aluminium, naturally anodised
pushing rod: stainless steel

Available variants
Linear actuators RA 600 are optionally available in the variants:
• 12 V supply voltage
• absolute stroke measuring system (up to 200 mm stroke)
• reinforced for high vibration load
• especially protected against corrosion
• LIN-BUS control


Linear actuators RA 60 K (figure 2)

Description
Linear actuators RA 60 K consist of a 12 V DC direct current drive, whose drive energy is transferred over a planetary gear and a spindle stroke actuator to the pushing rod. The generated lifting force is available as push and pull force.
The sturdy design with code class IP69k guarantees a trouble-free function also in rough operating conditions.
Linear actuators RA 60 K are maintenance free and can be operated with a duty cycle of up to 15%.
The version with limit switches is equipped with 2 sensors, that prevent an unintentional movement to the mechanical stroke ends and thus the overload of the mechanics. The end positions of the RA 60 K with stroke measuring system are definable by the signal of the stroke measuring system.

Operation
Linear actuators RA 60 K are supplied and operated with 12 V board supply of the vehicle electronics.
The version with stroke measuring system provides the absolute position values of the actuator to the control. Referencing is not required.
RA 60 K can be integrated on request into existing BUS systems and controlled by LIN or CAN bus.
Please contact us.

Version with limit switches
The version with limit switches has 2 integrated sensors, which automatically switch off the motor as soon as the upper or lower stroke end position is obtained. This guarantees that the linear actuator does not mechanically push against the stop.
The wires brown and white of this version are to be connected to 12 V DC. By changing the polarity, switching over from retracting to extending is effected.

Version with stroke measuring system
The version with absolute stroke measuring system is equipped with a linear potentiometer. A slider at the pushing rod produces a signal at the potentiometer, that is proportional to the position of the pushing rod. This signal can easily be evaluated by a priority control and is permanently available. Referencing is not required.
Due to the direct connection of the absolute stroke measuring system to the pushing rod, one gets a precise stroke information with slight backlash. With the stroke measuring system control-oriented applications and the compound of several linear actuators in synchronism can be realised.

Material
Body: polyamide, black, glass fibre reinforced
Guiding tube: aluminium, anodized and powder coated
Pushing rod: stainless steel

 

 

 
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figure 1: Electrical supply unit
 
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figure 2: Hand panel
 
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figure 3: Foot switch
 
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figure 4: Plug to connect RA 600
 
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figure 5: Kit of plug-type connectors - Superseal 5 Pol to connect RA 60
 

Control Modules for RA 600 and RA 60 K
as per data sheet M8.200

 

Electrical accessories for RA 600 and RA 60 K
• hand panel with connecting cable 1.6 m (figure 2)
• foot switch with connecting cable 3.0 m (figure 3)
• mains cable
• extension cable
as per data sheet M8.203

 

 

 

 

 

 

 

 

 
to connect RA 600
Plug (figure 4)
for control provided by the user
with 5 solded strands and blade receptables

 

 

 

 

to connect RA 60 K
Kit of plug-type connectors - Superseal 5 Pol (figure 5)
complete kit of plugs and bushing with seals.
For crimping of the plug contacts, the user has to remove the wire bushs of the cable.
The bushing is suited for wire diameters of 0.75 mm2 bis 1.5 mm2

to connect RA 600
Bearing sleeve for fork eyes
DU bushing Ø12 / Ø10

 

Application videos:

Video reportage "Following the traces of the ROEMHELD actuator"