Samson 3374 - Testing the Regulator

EB 8331-3 EN 7-1
Operation
7 Operation
After connecting the supply voltage, the ac-
tuator is ready for use.
7.1 Three-step mode
In three-step mode, the actuator stem is
moved in the corresponding direction by ap-
plying a signal to the terminal eL or aL (see
Fig.7-1).
Actuators with fail-safe action additionally
require a constant supply voltage (see the
'Installation' section).
eL
aL
Fig.7-1: Three-step control
7.2 Mechanical override
To operate the manual override, place a
4mmhexwrenchontheredactuatorshaft
located at the side of the housing (see
Fig.7-2).Turnthehexwrenchclockwiseto
move the actuator in 'aL' direction and
counterclockwise to move it in the 'eL'
direction(seeFig.7-1).Thehexwrenchis
included in the scope of delivery. It is
attached to the bottom of the housing.
Fig.7-2: Actuating shaft for manual override
Manual override is only possible in actuators
with fail-safe action when the supply voltage
(terminals L and N) is connected.
Note