PI M-228 Series, User Manual, Page: 17 / 49

3 Product Description
M­­228 / M­­229 Linear Actuators MP86E Version: 2.0.0 13
3.8 Technical Features
3.8.1 Limit Switches
The M-228 / M-229 is equipped with noncontact, Hall effect limit switches.
Each limit switch sends an overrun signal on a dedicated line to the controller. The controller
then stops the motion. If the controller does not stop the motion in time, the linear actuator
runs into the hard stop.
Refer to "Limit Switch Specifications" (p. 37) for more information.
3.8.2 Reference Switch
The M-228 / M-229 is equipped with a reference switch positioned at approx. the midpoint of
the travel range. The reference switch transmits an index pulse (TTL) when being passed.
In order to use the reference switch signal for reference moves, the controller must support the
reference signal type "index pulse" (refer to the user manual for the controller).
For more information, see "Reference Switch Specifications" (p. 37).