Samson 3374 - Installation

EB 8331-3 EN 6-1
Start-up
6 Start-up
Once the actuator has been mounted cor-
rectly and the wiring has been performed as
described in the 'Installation' section, the
electric actuator is ready for use and can be
controlled by a three-step signal according
to the technical data (see the 'Design and
principle of operation' section).
6.1 Adjusting the limit contacts
1. Unscrew screws on housing cover and
take the cover off the actuator.
2. Connect supply voltage.
3. Use the motor or manual override to
move the actuator stem to the point at
which the contact should react.
4. Usethe4mmhexwrenchtoturnspindle
of the adjustment gears (18) for the up-
per limit contact or for the lower limit
contact until the associated contact cam
on the cam holder (20) triggers the
switch contact of the upper or lower mi-
croswitch on the terminal board (17).
5. Replacecover.Brieyturnthefastening
screws counterclockwise with a screw-
driver to center them. Then fasten down
the cover by tightening the screws.
Actuator stem re-
tracted
Actuator stem
extended
19 1920
Fig.6-1: Contact cams and cam holder
B
18 21 1
When actuator stem retracted
B
18 21 1
When actuator stem extended
Fig.6-2: Contact cam unit
Fig.6-3: Terminal board · Limit contact (17)
1 Intermediate gear
18 Adjustment gear
19 Contactcam
20 Cam holder
21 Contact cam