FL2 LIMIT SWITCH & CNTRLNG UNT

The FL2 LIMIT SWITCH and CONTROLLING UNIT makes it possible to set the actuator for the desired stroke length. It also protects the actuator from running against the mechanical end stops, thereby avoiding damage. It is durable and can be used in most environments. It includes the aluminum profile tube, in which is mounted to the protection tube of the actuator. Two limit switch units are attached to the profile tube and can be adjusted to any position. The magnet rod is attached to the end of the adjustment tube and runs in a groove in the profile tube. When the magnet, which is attached to the free end of the rod, approaches the switch unit, the latter is activated. The switches are connected to the control unit, from which the relays disconnect the power to the motor. Dimensions: Overall Length: 210 mm, Extended 360 mm. Width: 86 mm, Motor Diameter: 140mm.

• FL1 ACTUATOR 12 VOLT P/N: 05-66223
• FL1 ACTUATOR 24 VOLT P/N: 05-66224

What is the function of part 05-66225 (FL2 LIMIT SWITCH & CNTRLNG UNT)? Is it included in FL1-actuator 24V or does it need to be purchased separately? Are these parts obliogatory for actuator operation?
Per the supplier: The FL2 is used to set the limit switches and is not mandatory for operation of the FL1 actuator. It is sold separately and not included with the FL1.