Retrofitting (When Resistance Transmitters Are Already Installed); Adjusting The Limit Contacts - Samson Type 3374 Mounting And Operating Instructions

Additional functions
6.1.2 Retrofitting (when re-
sistance transmitters are
already installed)
1. Unscrew screws on housing cover and
take the cover off the actuator.
2. Move the actuator stem to the end positi-
on depending on the fail-safe action
"Actuator stem extends" or "Actuator
stem retracts". Refer to section 3.3.
3. Remove serrated ring (6) and shim (10)
from spindle 2 (11.2).
4. Continue as described in item 8 on pa-
ge 24.
6.1.3 Adjusting the limit cont-
acts
1. Unscrew screws on housing cover and
take the cover off the actuator.
2. Connect power supply.
3. Use the motor or manual override to mo-
ve 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
microswitch on the terminal board (17).
5. Replace cover. Briefly turn the fastening
screws counterclockwise with a screwdri-
ver to center them. Then fasten down the
cover by tightening the screws.
26
Legend for Fig. 12 to Fig. 14:
1 Intermediate gear
6 Serrated ring
11.2 Spindle 2
10 Shim
12 Actuator board
18 Adjustment gears
19 Contact cam
20 Cam holder
21 Contact cam unit
EB 8331-3 EN