Adjusting The Limit Contacts - Samson 3374 Mounting And Operating Instructions

Actuators with resistance transmitters
1. Unscrew screws on housing cover and
take the cover off the actuator.
2. Move the actuator stem to the end posi-
tion depending on the fail-safe action
"actuator stem extends" or "actuator
stem retracts" (see the 'Operation' sec-
tion).
3. Remove serrated ring (6) and shim (10)
from spindle 2 (11.2).
4. Continue as described in item 8 on
page 5-7.
5.3.2 Adjusting the limit con-
tacts
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. Briefly turn the fastening
screws counterclockwise with a screw-
driver to center them. Then fasten down
the cover by tightening the screws.
EB 8331-3 EN
Installation
5-9