2 Product Specification
Linear actuators MC220 • MC223
Operating Manual Version 1.0 - September 2021 9
2.4.4 Actuating time
The time required for the rotary gurad to travel a defined distance is called
actuating time. Actuating time is specified in s/mm.
2.4.5 Hysteresis
Hysteresis equals the difference of the input signal (Y) that is required after a
reversal of signal direction in order to move the rotary gurad.
It serves to prevent permanent oscillation of the actuator motor around a certain
hoisting position during minor input signal alterations.
5.3 Setting the hysteresis on page 24
2.4.6 Manual mode and response signal
In manual mode it is possible to change the lift without supply voltage.
• Motor and control electronics are turned off in manual mode to make hoisting
movements of the control impossible.
• The moment you set the linear actuator to manual mode the control switches
a signal to terminal R, provided supply voltage is applied.
6.1 Changing between manual and automatic mode on page 30
2.4.7 Auto test
If a valve is not actuated for a long time the valve cone may get stuck. The auto
test function acts as a preventative measure. When you turn on the auto test
function for the linear actuator, the linear actuator will automatically move after
c. 10 days without actuation to the limit position set by encoding switch S6 and
return to initial position.
5.5 Setting auto test and auto pause on page 25
2.4.8 Auto pause
This function is used by the actuator to count the traverse commands per minute
that involve a change of direction. If there are more than 20 direction varying
traverse commands per minute this will result in a compulsory pause of 3 s.
5.5 Setting auto test and auto pause on page 25
2.4.9 Potential-free limit switch (accessory)
The optional path switch PCB allows you (106) to set two actuating positions
within which a potential-free contact is opened or closed.
5.7 Setting a potential-free path switch on page 26
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